Question 1
What mass of Na
2SO
4 is needed to prepare 350. mL of a solution having a sodium ion concentration of 0.125 M?
◦ 3.11 g
◦ 24.9 g
◦ 12.4 g
◦ 6.21 g
◦ 8.88 g
Question 2
What type of reaction is the following?
C
2H
4(g) + 3 O
2(g) → 2 CO
2(g) + 2 H
2O(g)
◦ Combination reaction
◦ Acid-base neutralization reaction
◦ Hydrogen displacement reaction
◦ Disproportionation reaction
◦ Combustion reaction