In these equations, figure out which atom loses electrons and which atom gains the electrons. Use net ionic equations when possible.

a. Mg(s) + Cu(NO3)2(aq) ---> Mg(NO3 )2(aq) + Cu(s)

b. Cl2(g) + S(s) ---> SCl2(g)

c. CuO(s) + H2(g) ---> Cu(s) + H2O(l)

d. 2 PbS(s) + 3 O2 ---> 2 PbO(s) + 2 SO2(g)

e. 6 Li(s) + N2(g) ---> 2Li3N(s)

f. 3 CuCl2(aq) + 2 Al(s) ---> 2 AlCl3(aq) + 3 Cu(s)

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

here is table 2-2:

country

percent of eligible voters that voted

rank

united states

44.9%

138

canada

60.1%

107

costa rica

84.6%

14

hungary

66.9%

82

japan

57.0%

118

egypt

27.7%

159

south africa

85.5%

10

ans is no, the data set cannot be plotted as a single circle graph

12 is it do you think so