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leva [86]
3 years ago
13

In order to separate two substances by fractional crystallization, the two substances must differ in which of the following?

Chemistry
1 answer:
aalyn [17]3 years ago
8 0

I would say vapor pressure, but I could be wrong. Good luck ^^
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When using the ideal gas constant value, R = 0.0821, in an ideal gas law calculation, the units of temperature may be expressed
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The statement "When using the ideal gas constant value, R = 0.0821, in an ideal gas law calculation, the units of temperature may be expressed as degrees Celsius or <span>Kelvin" is false. It must be Kelvin only not celsius</span>
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Does the mass number of an atom change when the atom forms a chemical bond?
cupoosta [38]
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Read the temperatures shown to the nearest 0.5°C.<br> I’ll mark you as brainlister
Ilya [14]

Answer:

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3 0
3 years ago
Starting with the partially balanced equation, C2H5OH(l)+?O2(g)→2CO2(g)+3H2O(l) what coefficient should be placed in front of O2
SpyIntel [72]

<u>Answer:</u> The coefficient '3' should be placed infront of oxygen gas to balance the oxygen atoms.

<u>Explanation:</u>

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This also means that total mass on the reactant side must be equal to the total mass on the product side.

A balanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.

For the given chemical reaction, the balanced equation follows:

C_2H_5OH(l)+3O_2(g)\rightarrow 2CO_2(g)+3H_2O(l)

By Stoichiometry of the reaction:

1 mole of ethanol reacts with 3 moles of oxygen gas to produce 2 moles of carbon dioxide gas and 3 moles of water molecule

Hence, the coefficient '3' should be placed infront of oxygen gas to balance the oxygen atoms.

5 0
3 years ago
Where do all humans get their food?
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If this helps, can you mark me as brainliest please?
3 0
3 years ago
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