Review for chem test

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

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


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