Question

It is necessary to know the formula of a compound in order to calculate its percent composition

AT


If the percent by mass of carbon in methane, CH4, is 75 percent, then 100 grams of methane contain 25 grams of hydrogen
ST


The formula for methane, CH4, is both a molecular and an empirical formula
ST


The empirical formula for glucose, C6H12O6 is C2H4O2
NT


percent composition
the percent by mass of each element in a compound


empirical formula
A formula showing the lowest whole number ratio of atoms in a compound. Can't be reduced.


molecular formula
describes the actual number of atoms of each element in a molecule of a compound

Answer 1

Step-by-step explanation:

1. If the percent by mass of carbon in methane, CH4, is 75 percent, then 100 grams of methane contain 25 grams of hydrogen.

YES

2. The formula for methane, CH4, is both a molecular and an empirical formula

YES

3. The empirical formula for glucose, C6H12O6 is C2H4O2

NO. The empirical formula is CH2O. C2H4O2 contains multiples of 2 atoms for each element. Divide each atom count by 2 to reach CH2O.

4. percent composition: the percent by mass of each element in a compound

YES

5. empirical formula

A formula showing the lowest whole number ratio of atoms in a compound. Can't be reduced.

YES

6. molecular formula

describes the actual number of atoms of each element in a molecule of a compound

YES