Review for chem test

How many moles are in 32.7 grams of ethanol (C2H6O)?

0.710 moles C2H6O

How many atoms are in 24g of Carbon?

1.2x10^24 atoms

What is the molar mass of Ca(NO3)2?

164.10g/mol

How many moles are in 58.6L of Nitrogen gas (N2) at STP?

2.62 Moles

How many atoms are in 5.5 moles of atoms?

3.3x10^24 atoms

What is the percent Composition by mass of Hydrogen in H20?

11.2%

What is the molar mass of (NH4)3PO4

149.12g/mol

Calculate the percent by mass of iron in FeCl3-.

34.43%

Determine the percent by mass of Carbon in C6H10O4-.

49.29%

What is the mass of 0.850 moles of sulfur dioxide (SO2)?

54.5g SO2

What is the molar mass of SO2?

64.07g/mol

How many moles is 4.6x10^24 Sulfur atoms?

7.6 Moles

What is the volume in liters of 3.80 moles of CO2 gas at STP?

85.1L

Determine the molecular formula of a compound with the empirical formula CF2 and a molar mass of 200.04 g/mol.

C4F8

A compound has a empirical formula C2H5N and a molar mass of 86.16g/mol. What is its molecular formula?

C4H10N2

Whats the empirical Formula of C18H12O9?

C6H4O3

Calculate the molecular formula of a compound with the empirical formula C2H2O and a molar mass of 126.12g/mol.

C6H6O3