D - density: 0.5 g/mL
m - mass: 500g
V - volume: ???
________
d = m/V
V = m/d
V = 500/0,5
V = 1000 mL = 1 L
:)
Answer:
1. d. 84g
2. c. 77.4%
Explanation:
1. Based on the reaction 2 moles of Na produce 2 moles of NaCl.
The moles of Na (22.99g/mol) in 33g are:
33g * (1mol / 22.99g) = 1.435 moles Na = 1.435 moles NaCl must be produced.
The mass of NaCl is (Molar mass: 58.44g/mol):
1.435moles * (58.44g / mol) = 84g
d. 84g
2. Percent yield is defined as 100 times the ratio between actual yield (65g) and theoretical yield (84g). The percent yield is:
65g / 84g * 100 =
c. 77.4%
The law of conservation of mass States that mass in an isolation system is neither created nor destroyed by chemical reactions or physical transformations and the mass of the products in a chemical reaction must equal the mass of the reactants.
