1) HF is not a strong acid
2) Fe3(PO4)2
3) Combustion reaction
4) 25 * 0.135 / 175 = 0.0193
5) Mg(NO3)2 ---> Mg2+ + 2NO3 -
[Mg(NO3)2] = [Mg2+] = 1.25 M
6) V = 3.75 * 150 / 12 = 46.9 ml
7) Neutralization reaction
8) net ionic;
CO3 2-(aq) + Co2+(aq) ----> CoCO3(s)
9) Most sulfates are soluble.
10) FePO4
11) Ni(s) is reducing agent
12) moles of KCl = 2/74.5 = 0.0268
Molarity = 0.0268/0.250 = 0.107 M
13) Gives relatively small percentage of ions when dissolves in water
14) Oxygen is balanced by adding H2O to one side
15) Spectator ions
16) increases with increase in temperature
17) H2SO4 + 2CsOH ---> Cs2SO4 + 2H2O
6 oxygen
18) % of C = 12*100/28 = 42.8%
19) Limiting reactant
20) Moles of O2 = 2.8/32 = 0.0875
Balanced chemical reaction;
2H2 + O2 ----> 2H2O
From reaction;
1 mole O2 produces 2 mole H2O
So, 0.0875 mole O2 will produce = 2 * 0.0875 = 0.175 mole of H2O
Mass of H2O = 0.175 * 18 = 3.15 g
% yield = 2.4*100/3.15 = 76.2 %
Please answer all multiple choice All questions need to be answered! Questions 1-20 are multiple choice...
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