The Mole

Click on the correct answer


1	What is Avogadro's number?
		6.64 x 10^-34
		3.00 x 10^8
		6.02 x 10^-23
		6.02 x 10^23
		1

2	What type of compound does the term formula mass refer to?
		Ionic
		Covalent
		Acid
		Molecular
		Base

3	How many moles of magnesium are there in 3.01 x 10^22 atoms of magnesium?
		0.500
		5.00
		0.0500
		0.00500
		50.00

4	How many molecules are there in 4.00 mol of calcium carbonate?
		1.66 x 10^-24
		6.02 x 10²³
		4.00
		100
		2.40 x 10²⁴

5	What is the percent of oxygen in ammonium nitrate
		40%
		60%
		20%
		10%
		28%

6	What is the mass of 1 mol of sodium?
		23 g
		11 g
		44 g
		12 g
		6.02 x 10^23

7	What is the molecular weight of diphosphorous dioxide?
		48 g
		51 g
		20 g
		94 g
		39 g

8	What is the molecular weight of one mole of oxygen gas?
		16 g
		32 g
		48 g
		100 g
		6.02 x 10²³

9	What is the name of a compound that is 25.9% nitrogen and 74.1% oxygen?
		dinitrogen monoxide
		nitrogen dioxide
		dinitrogen pentoxide
		nitrogen pentoxide
		pentanitrogen dioxide

10	*What is the name of the CuSO₄ 3H₂O hydrate**
		copper sulfate trihydrate
		copper(II) sulfate trihydrate
		copper(III) sulfate trihydrate
		copper sulfate hexahydrate
		copper sulfate