Mass of empty Erlenmeyer Flask (g) 30.46 g Mass of flask 100 ml 10% vinegar (g) 85.56 g Mass of flask 100 ml NaOH (g) 90.23 g Mass of flask after mixing the NaOH with 10% vinegar (g) 175.79 g Mass of the flask after the reaction (g) 145.33 g Temperature of the solution before it is mixed 21.9oC Temperature of the solution after it is mixed 23.1oC 1. Find the combined mass of the two reactions that have taken place. 2. Calculate the combined mass of the contents of the flasks after the reaction has taken place. 3. Finally, calculate the percent deviation within the lab. If the percent deviation was not 0%, what do you think might have happened in the lab that caused it to not be zero? (hint: remember, matter cannot be destroyed).

Answers

Answer 1

The combined mass of the two reactions that have taken place is 145.33 g.

The combined mass of the contents of the flasks after the reaction has taken place is 114.87 g.

The percent deviation is 20.9 % and is not zero because some products escaped as gas.

What is the law of conservation of mass?

The law of conservation of mass states that matter cannot be created nor destroyed.

This means that for a given chemical reaction, the total mass of the reactants will equal the total mass of the products.

The masses in the reaction are:

Mass of empty Erlenmeyer Flask (g) 30.46 g

Mass of the combined reactants =  (175.79 - 30.46) g

Mass of the combined reactants = 145.33 g

Mass of the contents of the flask after the reaction has taken place = 145.33 - 30.46) g

mass of the contents after the reaction = 114.87 g

Percent deviation = (145.33  - 114.87) / 145.33 * 100%

Percent deviation = 20.9 %

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Related Questions

why do you think printing a document on basic paper will help to ensure that it will last for a very long time

Answers

Answer:

So there is a physical version of it.

The relative atomic Mass of boron is 9. What do you mean by this statement?

Answers

Answer:

Boron has different isotopes with different atomic masses. The relative atomic mass of boron, which is 9, is the average of the atomic masses of the isotopes

Explanation:

The relative atomic mass is indicated in terms of its heaviness compared to the parts of mass of carbon-12. The relative mass of boron is 9 means its mass relative to the mass of carbon -12 is 9 amu.

What is relative atomic mass ?

The relative atomic mass of an element is the mass relative to the mass of carbon-12 or it can be defined as the number which indicates how many times the mass of one atom of the element is heavier in comparison to (1/12)th part of the mass of one atom of carbon-12.

Usually the mass number of an atom is the sum of number of protons and number of neutrons. But the actual mass or average atomic  mass is not calculated in this way.

The actual mass is determined using mass spectroscopy. The relative atomic mass of every element is computed based on the mass of C-12 obtained from spectroscopic technique.

Thus the relative atomic mass of boron is calculated in a similar way and it is 9 amu.

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a cylinder contains 30.0 l of oxygen gas at a pressure of 1.9 atm and a temperature of 310 k. part a how much gas (in moles) is in the cylinder? express your answer to two significant figures. view available hint(s)

Answers

The moles of the gas when a cylinder contains 30.0 l of oxygen gas at a pressure of 1.9 atm and a temperature of 310 K is 2.2

The ideal gas equation is PV=nRT. P is the pressure, V is the volume, n is the number of moles and T is the temperature

Substituting the values, we get

1.9x30=nx0.0821x310

n=2.2(two significant figures)

An ideal gas is one that follows the ideal gas equation.It is also called the equation of state of a hypothetical ideal gas.It is an extension and generalization of Boyle's and Charles's law.

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Is more or less heat needed to raise the temperature of 30 grams of gold from 25°C to 50°C compared to the 10 grams of water?

Answers

Answer:55*

Explanation:55*

What is the main idea of the excerpt chemistry in centuries

Answers

The main idea of the excerpt chemistry in centuries is all the matter present are composed of the atoms.

Aristotle declared that only four element exist in nature. They are -

Air, water, earth, fire.

He stated that all matter are composed of these four elements only.

When the atoms reacts, they form a chemical bond. It is defined as a force of attraction which holds the atoms together to form a compound.

Force of attraction is defined as a type of force which keeps two or more objects close to each other, or together no matter how far or close they are in distance.

Two major categories of forces of attraction are - intramolecular forces and intermolecular forces. Intramolecular is the type of forces in atoms which are present internally. While intermolecular is the type of force which is present in two or more elements.

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3. many electrophilic aromatic halogenations require the presence of an aluminum halide (aluminum chloride or aluminum bromide) as a catalyst. why is it unnecessary to include an aluminum halide in the electrophilic aromatic bromination reaction of acetanilide with molecular bromine.

Answers

The aluminum halide is used to increase the electrophilicity of the halogen, in electrophilic aromatic substitutions which is unnecessary because acetanilide is a very good nucleophile.

In electrophilic aromatic substitutions, the aromatic ring acts as the nucleophile, while the other component (halogen, alkyl halide, acyl halide, etc.) acts as the electrophile. The halogen molecules are not great electrophiles, so aluminum halide is added to facilitate the reaction.

However, the nucleophilicity of the aromatic ring can be increased through resonance and inductive effects of the substituents, and in acetanilide the electron-donating amide group is effective enough to make the aromatic ring a good enough nucleophile to, in turn, make the use of aluminum halide unnecessary.

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Raiderium (Cv) has three naturally occurring isotopes. Raiderium is 74.655% 44^Cv, which has an atomic mass of 4.064 amu, 24.958% 46^Cv, which has a mass of 46.125 amu, and 0.387% 48^Cv, which has an atomic mass of 47.982 amu. Calculate the average atomic mass of Raiderium. Please show your work.
I really need help on this one it’s a major part of my grade and I’m super stuck. I’ll mark brainliest answer if it’s correct. Thank you SO MUCH in advance.

Answers

The average atomic mass of Raiderium = 43.847amu

Average atomic mass = f1M1 + f2M2 + f3M3

where,

f is the fraction representing the natural abundance of the isotope

M is the mass number (weight) of the isotope.

(0.74655)(43.064amu) + (0.24958)(46.125amu) + (0.00387)(47.982amu)  = 43.847amu

What is at Atomic Mass ?

Atomic mass (ma or m) is the mass of an atom. Although the SI unit of mass is the kilogram (symbol: kg), atomic mass is often expressed in the non-SI unit Dalton (symbol: Da) – the equivalent of the unit atomic mass unit (u). 1 Da is defined as 1⁄12 of the mass of a free carbon-12 atom at rest in the ground state. Protons and neutrons in the nucleus make up almost all of the total mass of atoms, and the ratio of electron binding energy and nuclear force is small. Thus, the numerical value of atomic mass expressed in Daltons is almost the same as the mass number.

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The function group COOH is found in 1) esters 2)aldehydes 3)alcohols 4) organic acids

Answers

The functional group with the COOH setting is called Carboxylic acid, which is a type of organic acid, whereas Esters will have COOR representation, Aldehydes wl l be OCH and Alcohols OH, therefore the answer will be number 4

When a 6.00 g sample of KSCN is dissolved in water in a calorimeter that has a total heat capacity of 5.34 kJ⋅K−1, the temperature decreases by 0.280 K. Calculate the molar heat of solution of KSCN.

Answers

The amount of energy that must be supplied in the form of heat to 1 mole of substance to raise the temperature by 1 unit is -26.805kJ/mol.

Solution:

= 5.34 kJ/K * 0.31 K

= 1.655 joules kJ

mol of KSCN = mass/MW = 6.00/97.181

mol of KSCN = 0.0617404

= -Qsolutoin/mol = -1.655 /0.0617404 = -26.805kJ/mol.

Molar heat capacity is the amount of energy required to raise the temperature of one mole of a substance by one degree. to find the molar heat capacity of a compound or element, simply multiply the specific heat by the molar mass. The molar heat of the solution is the total energy change when a substance dissolves. KJ/MOL Measured in kilojoules/mole. Molar heat capacity is the amount of heat required to heat 1 mole of a substance to 1 Kelvin.

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Draw the Lewis dot diagram for lithium (p.180)

Answers

the Lewis dot diagram for lithium is

What is the nuclide symbol for an atom with 26 protons 31 neutrons and 24 electrons

Answers

The nuclide symbol for an atom with 26 protons 31 neutrons and 24 electrons is X⁵⁷₂₆ .

What is Nuclide symbol?

This scientific model is expressed in the form ᵃₙX, where a denotes the total number of protons and neutrons and is also referred to as the mass number, n represents the number of protons which is the atomic number.

Since the number of proton given is 26, then n which is the atomic number is 26. The mass number is the total number of protons and neutrons.

26 + 31 = 57.

Since therefore means that a which is the mass number is 57.

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carbonic anhydrases are a class of that catalyze . please choose the correct answer from the following choices, and then select the submit answer button. answer choices

Answers

Carbonic anhydrases are a class of zinc containing enzymes that catalyze the conversion of carbon dioxide into bicarbonate ions.

Carbonic anhydrases are a kind of enzyme that catalyzes the interconversion of carbon dioxide, water, and carbonic acid dissociated ions. Most carbonic anhydrases have a zinc ion in their active site. As a result, they are classed as metalloenzymes. Carbonic anhydrase is an enzyme that aids in the quick interconversion of carbonic acid, protons, and bicarbonate ions from carbon dioxide and water.

Carbonic anhydrase is present in the blood, gastrointestinal mucosa, and a trace amount in plasma. Carbonic anhydrase enzymes catalyze the conversion of water and carbon dioxide to carbonic acid dissociated ions. This results in the formation of bicarbonate anions, which dissolve in the blood plasma.

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What is the number of atoms in 12.00 g of carbon-12?
How many atoms are there in a mole (mol) of carbon-12?

Answers

Answer: The number of atoms = Avogadro's number = 6.022 × 10²³

Number of atoms in a mole = Avogadro's number = 6.022 × 10²³

Explanation:

1.

Mole = [tex]\frac{given mass}{molar mass}[/tex]

Also, Mole = [tex]\frac{Number of atoms/molecules/ions}{Avagadro's Number}[/tex]

∴  [tex]\frac{given mass}{molar mass}[/tex]  = [tex]\frac{Number of atoms/molecules/ions}{Avagadro's Number}[/tex]

[tex]\frac{12}{12}[/tex] = [tex]\frac{number of atoms}{Avogadro's number}[/tex]

number of atoms = Avogadro's number

number of atoms = 6.022 × 10²³

2.

Mole = [tex]\frac{Number of atoms/molecules/ions}{Avagadro's Number}[/tex]

1 =  [tex]\frac{Number of atoms/molecules/ions}{Avagadro's Number}[/tex]

number of atoms = Avogadro's number

number of atoms = 6.022 × 10²³

Which reaction is responsible for the production of lipids when glycerol is bonded to three fatty acids by the removal of a water molecule? question 10 options: dehydration synthesis hydrolysis hydrophilic hydrophobic

Answers

Dehydration Synthesis is the reaction which is responsible for the production of lipids when glycerol is bonded to three fatty acids by the removal of water molecule.

Dehydration synthesis is the creation of larger molecules from smaller monomers and a removal of water molecule takes place .This type of reaction is also classified as condensation reactions.

During this process, the hydrogen of one monomer combines with the hydroxyl group of another monomer releasing a molecule of water. In the attached image, glycerol and fatty acid combine to release water and a lipid molecule is formed.

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at 25 oc the solubility of magnesium fluoride is 1.17 x 10-3 mol/l. calculate the value of ksp at this temperature. give your answer in scientific notation to 2 significant figures (even though this is strictly incorrect).

Answers

The solubility constant is[tex]$6.4 \times 10^{-9}$[/tex].

The equilibrium for the solubility of the salt, [tex]$\mathrm{MgF}_2$[/tex] is,

[tex]$$\mathrm{MgF}_2(s) \stackrel{\mathrm{H} \cdot \mathrm{O}}{\rightleftharpoons} \mathrm{Mg}^{2+}(a q)+2 \mathrm{~F}^{-}(a q)$$[/tex]

The solubility product constant for [tex]$\mathrm{MgF}_2$[/tex] is,

[tex]$$K_{\text {吶 }}=\left[\mathrm{Mg}^{2+}\right]\left[\mathrm{F}^{-}\right]^2$$[/tex]

The molar solubility of [tex]$\mathrm{MgF}_2$[/tex] is taken as x, the x moles of [tex]$\mathrm{MgF}_2$[/tex]is dissolved in one litre water to produce x moles of [tex]$\mathrm{Mg}^{2+}$[/tex]and 2x moles of [tex]$\mathrm{F}^{-}$[/tex].

[tex]$\begin{array}{lccc} & \mathrm{MgF}_2(s) & \stackrel{\mathrm{H}_2 \mathrm{O}}{\rightleftharpoons} \mathrm{Mg}^{2+}(a q)+2 \mathrm{~F}^{-}(a q) \\ \text { Initial } & x & 0 & 0 \\ \text { Change } & & +x & +2 x \\ \text { Equilibrium } & x & 2 x\end{array}$[/tex]

The solubility product constant for[tex]$\mathrm{MgF}_2$[/tex] is,

[tex]$$\begin{aligned}K_{u p} &=\left[\mathrm{Mg}^{2+}\right]\left[\mathrm{F}^{-}\right]^2 \\&=(x)(2 x)^2 \\&=4 x^3\end{aligned}$$[/tex]

Substitute the solubility of [tex]$\mathrm{MgF}_2$[/tex] as [tex]$1.17 \times 10^{-3} \mathrm{~mol} / \mathrm{L}$[/tex]in the above equation as shown below:

[tex]$$\begin{aligned}K_{i p} &=4 x^3 \\&=4\left(1.17 \times 10^{-3}\right)^3 \\&=6.41 \times 10^{-9}\end{aligned}$$[/tex]

The solubility constant is [tex]$6.4 \times 10^{-9}$[/tex].(using 2 significant figures).

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PLEASE HELP SOON AS POSSIBLE!!!! I have points and Brainly

Answers

To calculate density, the formula would be D = M/V

2. Grams = M, milliliters = V
So, 3 / 2 = 1.5
Density = 1.5 g

3. W x L x H = 40 x 80 x 18 = 57,600 cm
1 / 57,600 = 0.00001736 kg

consider the reaction when aqueous solutions of chromium(ii) sulfate and calcium nitrate are combined. the net ionic equation for this reaction is:

Answers

Molecular equation:

CrSO4(aq) + Ca(NO3)2 (aq) —> Cr(NO3)2(aq) + CaSO4(s)

Net ionic:

Ca2+(aq) + SO4(aq) —> CaSO4(s)

A balanced equation is another name for a chemical equation. Any ionic substances or acids are represented as neutral compounds in a molecular equation using their chemical formulae. Following the formula are parenthesis that describe each substance's condition.

A net ionic equation is often constructed using the fewest integer values for the stoichiometric coefficients. As a result, in order to obtain the net ionic equation's final form, it may occasionally be necessary to divide all of the stoichiometric coefficients by a single factor.

The spectator ions are also included in a complete ionic equation, whereas a net ionic equation just displays the chemical species that are engaged in a process. We are able to determine the net ionic equation for a specific

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Which transition in an excited hydrogen atom will emit the longest wavelength of light?
A. E5 to E1
B. E4 to E1
C. E3 to E1
D. E2 to E1

Answers

The transition in an excited hydrogen atom will emit the longest wavelength of light is E2 to E1. Thus option D is correct.

What is transition?

Transition is defined as a specific arrangement along the reaction coordinate.

It can also be defined as the condition corresponding to the maximum potential energy along this reaction coordinate is what is meant by this term.

d-block elements shows transition because they behave in a way that transitions between s-block and p-block components, the d-block elements are known as transition elements.

Transition in the elements occurs when the electrons come under excited state and travel form lower energy level to higher energy level.

Thus, the transition in an excited hydrogen atom will emit the longest wavelength of light is E2 to E1. Thus option D is correct.  

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Which two notations represent isotopes of the same element?
1.
2
3.
4
^14 7N and ^18 7N
^20 7N and ^20 10 Ne
^14 7N and ^17 10Ne
^19 7N and ^16 10 Ne

Answers

" 14/7 N and 18/7 N "

Isotopes are two or more different atom types that share the same atomic number and place in the periodic table but have different quantities of neutrons in their nuclei, resulting in various nucleon numbers.

Isotopy is a phenomenon in chemical element atoms defined by a difference in the mass number of an element's atoms, even if the atoms always have the same atomic number.

The variation in neutron counts is thought to be the cause of the variance in mass number. This is true because an element's atomic number, which determines how many protons are present in its nucleus, is constant for isotopes.The number of neutrons and protons in the atom's nucleus is represented by the mass number, on the other hand.The choice in this case corresponds to two nitrogen atoms that have the same atomic number but different masses.

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What is the reaction classification of the above reaction? A2B (l) → A2 (g) + B2 (g)

Answers

The reaction classification of the reaction, [tex]A_2B (l) -- > A_2 (g) + B_2 (g)[/tex], is a decomposition reaction.

What is a decomposition reaction?

In chemistry, a decomposition reaction is one in which a compound or a reactant decomposes to produce two or more chemically unique substances as the products.

Thus, a typical decomposition reaction can be written as:

AB ---> A + B

Decomposition reactions are the opposite of combination reactions. In combination reactions, two or more reactants combine to form a single product. A combination reaction can be written as:

A + B ---> AB

Considering the reaction in question:  [tex]A_2B (l) -- > A_2 (g) + B_2 (g)[/tex]

[tex]A_2B[/tex] is the reactant. It undergoes a reaction to produce [tex]A_2[/tex] and [tex]B_2[/tex] respectively. In other words, the reaction is a decomposition reaction.

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If you have a liquid that you suspect might be a mixture explain what you might do to find out if it is.

Answers

Answer:

add a substace devider

Explanation:

i forgot what it was called but there is a chemical that allows the substances to seperste and than you can test the substaces ph and what it is

at 20°c, a cell containing 0.6m glucose is in equilibrium with its surrounding solution containing 0.5m glucose in an open container. what is the cell’s ψp?

Answers

The cell’s pressure potential or ψp is 2.44 bars if the cell contains 0.6M glucose at 20°c with its surrounding solution containing 0.5M glucose.

As;

ψoutside = ψcell ( here ψ represents water potential)

Therefore;

ψp outside + ψs outside = ψp cell + ψs cell ( Since, ψ = ψp + ψs)

As ψs = -iCRT, therefore

0 + (-iCRT outside) = ψp cell + (-iCRT cell)

In iCRT, i represents the ionization constant

C represents the Molar concentration

R represents the Pressure constant 0.0831 liter bars/mole at degrees Kelvin

T represents temperature (degree kelvin)

Substituting the values;

(-1)(0.5M)(0.0831)(20 + 273) = ψp - (1)(0.6M)(0.0831)(20 +273)

-12.17 = ψp cell - 14.61

ψp cell = (-12.17) + 14.61

ψp cell = 2.44 bars

Therefore, the cell’s pressure potential (ψp) is calculated to be 2.44 bars if the cell contains 0.6M glucose at 20°c with its surrounding solution containing 0.5M glucose.

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50.0 mL of a Ba(OH)2 solution
were titrated with 66.90 mL of a
0.500 M HCl solution to reach the
equivalence point. What is the
molarity of the Ba(OH)2 solution?

Answers

According to the given statement 0.3345 M  is the molarity of the Ba(OH)₂ solution.

What is a molarity means?

The quantity of a substance in a specific solution volume is known as its molarity (M). The amount of moles of a solute every litre of a solution is referred to as molarity. The molecular concentration of a solution is another name for molarity.

Briefing:

Ba(OH)₂+  2HCl ⇒ BaCl₂ + H₂O

Ratio of moles Ba(OH)₂ ,  

HCl  = 1:2

Amount of HCl consumed

= 0.500/1000*66.90

= 0.03345 mol

So Ba(OH)₂ reacted = 1/2 * 0.03345 mol

If  molarity of Ba(OH)₂ is x then

x/1000*50 = 1/2 * 0.03345

x =  0.3345 M.

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The table below shows the densities of the elements in Group 0 of the periodic table. Noble Gas helium neon argon krypton xenon radon Density (kg/m³) 0.2 0.9 1.8 3.7 5.9 9.7 Use the data from the table to draw a graph to show the trend in density as you move down Group 0.​

Answers

The graph below shows the densities of the elements in Group 0 of the periodic table.

What is periodic table?
The chemical elements are shown in tabular form on the periodic table, commonly referred to as the periodic table of the (chemical) elements. It is frequently used in physics, chemistry, and other sciences and is frequently regarded as a symbol of chemistry. It is a visual representation of the periodic law, which claims that the atomic numbers of chemical elements have a roughly periodic relationship with their attributes. The table is divided into four blocks that are about rectangular in shape. The table's columns are referred to as groups and its rows are known as periods.

The trend in density is that the density increases as you move down Group 0. This is because the elements in Group 0 are all noble gases. The noble gases are all gases at room temperature and pressure. The reason for this is that the noble gases all have full outer shells of electrons. This means that the attractive forces between the nuclei and the electrons are very weak. The noble gases are all very unreactive because of this. The reason that the density increases as you move down Group 0 is because the atoms get larger as you move down the group. The larger the atom, the more massive it is. This means that the atoms are more likely to collide with each other, and so the density of the gas increases.

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A molecule that organisms get from the air or water around them is

Answers

Oxygen i think cause oxygen is a molecule you get from breathing

■ what quantity of heat is required to raise the temperature of 50.00 ml of water from 25.52 °c to 28.75 °c? the density of water at this temperature is 0.997 g/ml.

Answers

Answer:

So in this problem, were asked to calculate how much heat is required to raise the temperature of a certain amount of water from 25.52 degrees Celsius to 28.75 degree Celsius. So let's start with our equation that relates are variables que which is he is equal to mass proof. That is a rough em mass time specific heat times the change in temperature. So we're looking for heat and mass. We do not have mass, but we do have both the density and the volume of water. And so to find mass weaken knew our 50 milliliters that were given in the problems them times the density of water which is point nine 97 grams for one Miller Leader, Let me fix this night up here seven is well, that is our mess. Variable. We know just from looking at the table 6.1 in the chapter that the specific heat of water is four 0.184 Jules per gram killed in and finally we know that the change in temperature just gonna switch this down. Here is the final temperature 28 0.75 degrees Celsius minus our initial temperature, 25 0.52 degrees Celsius. And we can just plug this into a calculator really quickly. 28 2.75 I'm just going to start on this side of the equation. So the change in temperature is 3.23 degrees Celsius. Times are specific. Heat 4.184 and then times are mass, which is 50 times 500.997 And we get our final answer of 600 73 point.

tin has 10 stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occurring tin atoms. how many atoms of 124sn are present in 23.0 g of naturally occurring tin?

Answers

Atoms of 124sn are present in 23.0 g of naturally going on the tin: The average atomic mass of Sn is 118. seventy-one g/mole percentage.

This is explained as the Atomic mass of Tin (Sn) = 118.71 g/mol. 1 mol of Sn = 118.71 g.

An atom is the smallest unit of everyday count that bureaucracies a chemical detail. each solid, liquid, gas, and plasma consists of neutral or ionized atoms. Atoms are extraordinarily small, commonly around one hundred picometers throughout.

An atom is a particle of count that uniquely defines a chemical detail. An atom includes a principal nucleus that is surrounded by one or extra negatively charged electrons. Atoms are built of two kinds of elementary particles: electrons and quarks. Electrons occupy an area that surrounds an atom's nucleus. each electron has an electrical rate of -1. Quarks make up protons and neutrons, which, in flip, make up an atom's nucleus.

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the endpoint of the complexometric titration occurs when the solution color changes from yellow to select one: colorless absence of any green or yellow color. purple green pink

Answers

The colour of Variamine blue salt B, a redox indicator changes from yellow to colourless at the endpoint of the complexometric titration indicating alkalinity.

Complexometric titration (also known as chelatometry) is a type of volumetric analysis in which the creation of a coloured complex is utilized to determine the titration's end point. Complexometric titrations are extremely useful for estimating the concentration of a metal ion mixture in solution. EDTA, or ethylenediaminetetraacetic acid, is a frequent indicator for complexometric titration because it may function as a ligand, binding to coordination centers, which are generally metals, to produce colourful complexes. Organic dyes are the most commonly used indicators in complexometric titrations because they generate a colourful complex with the metal ion being titrated. EDTA replaces the indicator during the reaction to create a more stable complex with metal, and when the reaction is through, the colour changes.

The alkalinity of solution is indicated by a colour change from yellow to colourless in the complexometric titration using Variamine blue salt B as the indicator.

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How do I find an the isotope?

Answers

Among the given isotopes,  ³⁰X₁₅ and ³¹X₁₅ are isotopes of the same element and that element is phosphorous.

What is an isotope?

Isotopes are those atoms of an element that contains the same atomic number but a different mass number. Isotopes of an element contain an equal number of electrons and protons in their atom but the numbers of neutrons in their respective nucleus are different.

For example, the isotopes of oxygen element are given as oxygen- 16, oxygen - 17, and oxygen-18, these all isotopes have eight protons or electrons.

Given elements are ³⁰X₁₅, ³¹X₁₆, ³¹X₁₅, and ⁶⁰X₃₀. The atoms ³⁰X₁₅ and ³¹X₁₅  have the same atomic number but a different mass number, therefore they are isotopes of the same element. As their atomic number of them is 15 so they are isotopes of phosphorous and ³¹X₁₅ isotope of P has 100 % abundance.

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Raquel would like to describe the observable properties of water. What properties can she use?

A Colorless and rough
B Colorless and smooth
C Smooth and rough
D Soft and smooth


HELP ASAP

Answers

Answer:

b

Explanation:

water is generally transparent and smooth to the touch unless it is frozen, then it is rough

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