Hey there!:
density = mass / volume
1.84 g/mL = 12 g / V
V = 12 / 1.84
V = 6.521 mL
hope this helps!
Molarity= moles/ liters
first you need to calculate the moles using the molar mass of the molecule to convert grams to moles
molar mass MgO= 40.3 grams/ mole
62.5 gram MgO (1 mole/ 40.3 grams)= 1.55 mole
Molarity= 1.55 mole/ 1.50 Liters= 1.03 M
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Answer:
The anwer is not D the anwer is A
Explanation:
<u>Given:</u>
Mass of H2O2 solution = 5.02 g
Mass of H2O2 = 0.153 g
<u>To determine: </u>
The % H2O2 in solution
<u>Explanation:</u>
Chemical reaction-
2H2O2(l) → 2H2O(l) + O2(g)
Mass % of a substance in a solution = (Mass of the substance/Mass of solution) * 100
In this case
% H2O2 = (Mass H2O2/Mass of solution)* 100 = (0.153/5.02)*100 = 3.05%
Ans: % H2O2 in the solution = 3.05%
