Which option is a mixture? a.carbon dioxide b. air c. oxygen d. carbon
Answer:
Air
Explanation:
Did test 100
find the oxidation number of carbon in MgCO3
Answer: +2
Explanation: Formula of oxide is MgO, because oxidation state of Mg in MgCO3 is +2.
Explain in your own words what chemical change is
Answer:
A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust.
Explanation:
Answer: when one chemical substance is transformed into one or more different substances.
Explanation:
What form of energy is stored once glucose is from
o A. light energy
O B. kinetic energy
O C. chemical energy
O D. mechanical energy
Answer:
The form of energychemical energy
energy is lost due to
Answer:
Friction
Explanation:
Energy is lost to heat as the object overcomes kinetic friction as it slides up the ramp. The energy loss is equal to the work done by the friction force.
2 Examples of solid, liquid and gas
Answer:
Solid
1. Stone
2. Brick
Liquid
1. Water
2. Oil
Gas
1. Oxygen
2. Nitrogen
Answer:
rock and sand, water and steam, smoke and hydrogen
Explanation:
rock and sand are solids, water and steam are liquids, smoke and hydrogen are gases. trust me i know this
why hot water is hot on touching?
Thermal Energy
When a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.
Billy is trying to figure out what type of wood to use for building a model boat. He has a block of wood with a volume of 8.0 cubic centimeters (cm3) and a mass of 4.0 grams (g). What is the density of the block of wood in g/cm3 to the nearest tenth?
A 0.5
B 2.0
C 4.0
D 32.0
Answer:
A; 0.5
Explanation:
To find the density, you have to do the Mass divided by the Volume; in this case, it's 8.0/4.0.
8/4 = 0.5
HURRY I NEED HELP!! Please answer!!
Answer:
I'm confused on what u need us to answer
An element that is in the same period as nitrogen is _________
Group of answer choices
helium
neon
argon
sodium
Answer:
Neon
Explanation:
Chemical element Chemical series Electron configuration
3 . Li -Lithium Alkali metal [He] 2s1
4 . Be-Beryllium Alkaline earth metal [He] 2s2
5. B -Boron Metalloid [He] 2s2 2p1
6. C-Carbon Reactive nonmetal [He] 2s2 2p2
7 . N -Nitrogen Reactive nonmetal [He] 2s2 2p3
8. O-Oxygen Reactive nonmetal [He] 2s2 2p4
9. F -Fluorine Reactive nonmetal [He] 2s2 2p5
10. Ne-Neon Noble gas [He] 2s2 2p6
CCl4(l) is placed in a previously evacuated container at 30°C , and some of the CCl4(l) evaporates. In the box below, draw a particulate diagram to show the species in the container after some of the CCl4(l) has evaporated. The phases of the species should be indicated by the spacing and distribution of the particles in the diagram. Some of the species shown in the legend will not be used.
Answer:
The phases of the species should be indicated by the spacing and distribution of the particles in the diagram
Explanation:
Evaporation would be a phase change from liquid to gas where intermolecular forces are broken CCl4 (l) -> CCl4 (g)
Diagram is attached below
We have that from the diagram that when CCl4(l) is placed in a previously evacuated container at 30°C , and some of the CCl4(l) evaporates that the molecules of CCl4(g) becomes loosely held and apart from while in its closely held in its liquid state.
From the question we are told
CCl4(l) is placed in a previously evacuated container at 30°C , and some of the CCl4(l) evaporates. In the box below, draw a particulate diagram to show the species in the container after some of the CCl4(l) has evaporated. The phases of the species should be indicated by the spacing and distribution of the particles in the diagram. Some of the species shown in the legend will not be used.
Generally
We will see from the diagram that when CCl4(l) is placed in a previously evacuated container at 30°C , and some of the CCl4(l) evaporates that the molecules of CCl4(g) becomes loosely held and apart from while in its closely held in its liquid state
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Summarize why error is important.
Answer:
To say to you that you've made a mistake
Explanation:
what is homogeneous mixture?
A mixture is a portion of matter made up of two or more substances called constituents. Mixtures are the product of the mechanical joining of substances without change in chemical nature, and therefore, each constituent retains its properties.
the option 4
Can y’all look at this and help please
Answer:
2, 3, 4, 5
Explanation:
Pretty sure protons matter a lot unless in acid and bases but ignore this. Atoms mostly empty space as electrons are reeeeeeeeeeaaaallllllyyyy far apart. number of electrons change it is an ion and neutrons change pretty sure its an isotope. Electrons are stupidly small and fast so they don't really count towards the weight. Most mas comes from neutrons and protons in the nucleus
Answer:
2,3,4,5
1st is wrong cuz if u change the number of proton it would change the atomic number which results in different element
6th is wrong because most mass of the atoms come from neutrons and protons collectively so if it would have said THE ATOMS MASS MOSLTY COMES FROM NUCLEONS then u could mark it right
1. An atom has 6 protons, 6 neutrons, and 6 electrons. What is the charge of the
atom's nucleus?
A.+6
B.+12
C.-6
D.-18
Answer:
+6
+6
+6
+6
+6
+6answer given
thanks
*PLEASE HELP*
How do carbon radiometric dating utilize isotopes?
Answer:
Radiocarbon dating works by comparing the three different isotopes of carbon. Isotopes of a particular element have the same number of protons in their nucleus, but different numbers of neutrons. This means that although they are very similar chemically, they have different masses.
Explanation:
Is the equation C2H4 —> 2C + 2H2 + 52.3 exothermic or endothermic?
Answer:
Exothermic
Explanation:
Which compound contains nitrogen with an oxidation number of +3?
Answer:
Nitrous Acid [tex]N_{2}O_{3}[/tex]
Nitrogen is in the +3 oxidation state in N2O3. Nitrous acid is a weak acid.
The compound contains nitrogen with an oxidation number of +3 is N₂O₃ and nitrous acid HNO₂. Nitrous acid is a weak acid.
What do you mean by oxidation state ?The term oxidation state is defined as the total number of electrons that an atom either gains or loses in order to produce a chemical bond with another atom. The oxidation state is also called as oxidation number.
The formula for calculating oxidation states would be : The Highest Oxidation State for a Transition metal = Number of Unpaired electrons + Two s-orbital electrons.
The compound contains nitrogen with an oxidation number of +3 is N₂O₃ because it can acquire three electrons to form a chemical bond and to complete its outermost orbit (octet).
Thus, The compound contains nitrogen with an oxidation number of +3 is N₂O₃ and nitrous acid HNO₂.
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What is a mixture meaning
Answer:
A mixture is a substance of different things combined together.
Explanation:
Hope this Helps!
Can yall plz help me!!!!!!!!!!!!
Define the terms below:
● Axis:
● Rotation:
● Revolution:
● Elliptical Orbit:
Answer:
Axis
Anatomy
In anatomy, the second cervical vertebra of the spine is named the axis or epistropheus. By the atlanto-axial joint, it forms the pivot upon which the first cervical vertebra, which carries the head, rotates.
Rotation
A rotation is a circular movement of an object around a center of rotation. A three-dimensional object can always be rotated about an infinite number of imaginary lines called rotation axis. If the axis passes through the body's center of mass, the body is said to rotate upon itself, or spin.
Revolution
In political science, a revolution is a fundamental and relatively sudden change in political power and political organization which occurs when the population revolts against the government, typically due to perceived oppression or political incompetence.
Elliptic orbit
In astrodynamics or celestial mechanics, an elliptic orbit or elliptical orbit is a Kepler orbit with an eccentricity of less than 1; this includes the special case of a circular orbit, with eccentricity equal to 0. In a stricter sense, it is a Kepler orbit with the eccentricity greater than 0 and less than 1.
:) gimme a crown plz
Which situation aUggeata that an experlment han rellable renultn?
A. The experiment use8 a very uimple procedure
B. The experiment generates ldeau for new experimenta
C. The experiment can be repeated with the aame outcome.
D. The experiment aupports the hypothesls.
Answer:
Shiny like a limousine
You're spending like a cash machine
Smile, show your golden teeth
That's how you cover up your cavities
You're glowing like a diamond ring
I saw you bought some other things
You're spending like a cash machine
To cover up your insecurities
Don't front, no need ty67t6767
Explanation:
What is the relationship between the atomic mass of an element and a mole of that element's atoms?
Answer:
Each ion, or atom, has a particular mass; similarly, each mole of a given pure substance also has a definite mass. The mass of one mole of atoms of a pure element in grams is equivalent to the atomic mass of that element in atomic mass units (amu) or in grams per mole (g/mol).
Explanation:
The relationship between the given terms is provided below throughout the below segment.
One mole of such a component's atomic weights is approximately equivalent to that component's atomic mass. This same atomic mass of the oxygen element, for example, is about 16g. As a result, one mole containing oxygen atoms equals 16g of oxygen ([tex]O_2[/tex]). 1 mole containing oxygen atoms weighs 16g.We can say that,
→ [tex]1 \ mole \ in \ gram \ of \ an \ element = Atomic \ mass \ of \ an \ element[/tex]
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What element is the only Noble Gas in the s-block?
Answer:
Helium
Explanation:
Answer:
helium i guess i m not sure
What is the frequency of an event?
Group of answer choices
Probability
Degree
Expected occurrence
Identification
Answer:
Probability
Explanation:
Which can change from one state of matter to another at the temperatures and pressures experienced at Earth’s surface?
oxygen
carbon dioxide
water
nitrogen
how long will take an object traveling at 25 m/s to reach a distance of 125 meters?
Answer:
5s
Explanation:
Where are earthquakes most likely to occur? A. Where Earth’s tectonic plates are sliding past each other. B. Where magma cools slowly beneath Earth’s surface. C. Where Earth’s lithosphere is in constant, slow motion. D. Where Earth’s seafloor is spreading into deep ocean trenches.
Answer:
d
Explanation:
Answer:
A
Explanation:
When the tectonic plates slide across each other they cause a huge vibration making the area around Shake if its a big enough of vibration it can breach the surface causing a huge crack.
What happens to energy when frequency
is reduced by one half?
Energy is doubled
Energy is squared
Energy is halved
Energy remains constant
Answer:
Energy is halved.
Explanation:
Energy and Frequency are directly proportional. If frequency decreases, energy increases. If frequency increases, energy increases. If frequency is halved, energy is also halved.
_________ change is a change in matter that results in a material changing from one state to another without any change in chemical properties. Example: solid ice changes to liquid water.
Answer:
Physical change
Explanation:
What kind of investigation are best for demonstrating cause and effect