<span>a. 0.325 g / 63.55 g/mol = 5.11 X 10^-3 moles Cu. SHould form 5.11 X 10^-3 mol Cu2+
b. Should form 5.11 X 10^-3 mol Cu(OH)2
c. 1 g Zn / 65.4 g/mol = 0.0153 mol Zn
Excess Zn = 0.0153 - 0.0051 = 0.0102 moles excess zinc
d. 5.11 X 10^-3 mol Mg X 24.3 g/mol = 0.124 grams Mg</span>
Explanation :
Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.
The rule apply for the multiplication and division is :
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
The rule apply for the addition and subtraction is :
The least precise number present after the decimal point determines the number of significant figures in the answer.
(a) 628 × 342
The correct answer is,
(b) (5363 × 102) × (7.4 × 103)
The correct answer is,
(c) 28.0 ÷ 13.483
The correct answer is, 2.08
(d) 8119 × 0.000023
The correct answer is,
(e) 14.98 + 27,340 + 84.7593
The correct answer is,
(f) 42.7 + 0.259
The correct answer is,
<span>Salt disappears in water because it dissolves in water, but pepper doesn't disappear. You mix faster and so the salt disappears.</span>
I actually do not know the answer can I help tommorow if you are fine with it tooo sleeeepy have 14 exams tommorow have to prepare.
Sorry:(
Answer:
The solubility curve helps us to predict which substance will crystallize out first from a solution containing two or more solutes. The solubility curve helps us to compare the solubilities of different substances at the same temperature.