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Dominik [7]
3 years ago
13

Question 3(Multiple Choice Worth 3 points) When a substance freezes, what happens to the mass? A-There is no mass once the subst

ance becomes a solid. B-The mass stays constant as it changes from a liquid to a solid. C-The mass decreases as it changes from a liquid to a solid. D-The mass increases as it changes from a liquid to a solid.
Chemistry
1 answer:
Dominik [7]3 years ago
4 0
The answer is D) The mass increases as it changes from a liquid to a solid.
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Which type of stoichiometric calculation does not require the use of the molar mass?
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The choices can be found elsewhere and as follows:

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3 years ago
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Calculate the amount of heat needed to boil 159.g of water
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Chemists use the periodic table to organize the elements. What are some ways in which this organization is useful? Select all th
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Answer: Another useful feature of the periodic table is that most tables provide all the information you need to balance chemical reactions at a glance. The table tells each element's atomic number and usually its atomic weight. The typical charge of an element is indicated by its group.

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What is the molecular formula of a compound with the empirical formula
ipn [44]

Answer:  C_2H_2O_2

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

The empirical formula is CHO

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Now we have to calculate the molecular formula:

n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}=\frac{60}{29}=2

The molecular formula will be=2\times CHO=C_2H_2O_2

Thus molecular formula will be C_2H_2O_2

5 0
3 years ago
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