MOLES, GRAMS AND PARTICLES QUESTIONS AND ANSWERS

MOLES, GRAMS AND PARTICLES
QUESTIONS AND ANSWERS

What is the mass, in grams, of 6.11 mol of sulfur trioxide?

A) 80.1 g
B) 48.6 g
C) 391 g
D) 489 g
E) 801 g - answer--489 g

One mol of particles of any substance contains how many particles?

A) 10⁶
B) 3 × 10⁻¹⁰
C) 3 × 10¹⁰
D) 6.022 × 10²³
E) 6.022 × 10⁻²³ - answer--6.022 × 10²³

Avogadro's number is the number of

A) particles in 1 mol of a substance
B) amu in 1 mol of a substance
C) grams in 1 mol of a substance
D) moles in 6.022 × 10²³ grams of an element
E) moles in 6.022 × 10²³ amu of an element - answer--particles in 1 mol of a
substance

What is the mass of 0.00100 mol of caffeine, C₈H₁₀N₄O₂?

A) 194 g
B) 87.0 g
C) 0.194 g
D) 0.870 g
E) 1.94 g - answer--0.194 g

What is the mass of 2.00 mol of bromine, a liquid element?

A) 16.0 g
B) 79.9 g
C) 70.0 g
D) 160. g
E) 320. g - answer--320. g

0.100 mol of lithium has a mass of