According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
∴ B is the Answer
Answer:
0.069moles
45.65%
Explanation:
Firstly, we need to calculate the number of moles of CO2 produced. We can use the ideal gas equation for this.
PV = nRT
n = PV/RT
according to the question,
P = 746torr
V = 1.73L
T = 26 = 26 + 273.15 = 299.15K
n = ?
R = 62.364 L. Torr/k.mol
n = (746 * 1.73)/(62.364 * 299.15) = 0.069moles
B. To get this, we can use their molar masses. The molar mass of calcium carbonate is 100g/mol while for magnesium carbonate, molar mass is 84g/mol
The percentage by mass is (84)/(84 + 100) * 6.53g = 2.98g
= 2.98/6.53 * 100 = 45.65%
Explanation:
There are quite a number of ways to increase the solubility of substances.
Solution is a homogeneous mixture formed by dissolving a solute in a solvent.
Here are some things that can increase the rate of dissolution;
- Grinding/pulverizing - helps to increase the surface area for the solvent to react.
- Stirring - to bring more solvent in contact with the solute intimately.
- Heating - to facilitate dissolution of solute in solvents.
learn more:
Chemical reaction brainly.com/question/6281756
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0.000345 in scientific notation is 3.45*10^-4
