1. what is the gram formula mass of ca(
(1) 29g
(3) 56 g
(2) 34 9
(4) 74 g

Ca=40 and 2(OH)=34. Then the answer is 74 grams per mol

Explanation:

Ca= 40 gram

O= 16 gram

H=1 gram

OH=17 gram

1 Ca= 40 gram

2 OH=2*17 gram

Sum these up = 74 grams per mole

answer; i believe the correct answer is (solid gold);

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l