Chemical Quantities

How many moles of Na are in 46 g of Na?

• 0.2 moles

• 2 moles

• 20 moles

• 0.02 moles

What is the mass of 1.5 moles of CO₂?

• 66 g

• 0.66 g

• 6.6 g

• 660 g

How many molecules are in 0.5 moles of NaCl?

• 6.02 x 10²³

• 3.01 x 10^-23

• 6.02 x 10^-23

• 3.01 x 10²³

What is the molar mass of sulfuric acid: H₂SO₄?

• 98 g/mol

• 49 g/mol

• 980 g/mol

• 490 g/mol

The Avogadro's Number is?

• 6.022 x 10^-23

• 3.011 x 10²³

• 6.022 x 10²³

• 3.011 x 10²³

The molar volume at standard temperature and pressure (STP) is?

• 2.24 L

• 22.4 L

• 224 L

• 0.224 L

How many liters (L) of O₂ occupy 0.5 moles?

• 11.2 L

• 1.12 L

• 112 L

• 0.112 L

The amount of substance that contains exactly 6.022 x 10²³ particles is?

• 0.5 moles

• 1.5 moles

• 0.1 mol

• 1 mol

How many moles occupy a volume of 11.2 L of N₂?

• 1 mol

• 0.1 mol

• 0.5 mol

• 5.0 mol

Standard Temperature (T) and Pressure (P) is?

• T = 0^o C or 273K and P = 1.00 atm

• T = 25^oC and P = 1.00 atm

• T = 0^oC or 273K and P = 0 atm

• T = 25^oC and P = 0 atm