Answer:
- <em><u>% of calcium carbonate = 28.8%</u></em>
Explanation:
The <em>percentage </em>of a substance in a mixture is calculated with the formula:
- % of substance = (mass of substance / mass of mixture) × 100
In this case we have:
- mass of substance = mass of <em>calcium carbonate</em> = 1.73 g
- mass of<em> mixture</em> = mass of <em>calcium carbonate</em> + mass of <em>sodium carbonate</em> + mass of <em>magnesium sulfate</em>
- mass of <em>mixture</em> = 1.73 g + 2.34 g + 1.93 g = 6.00 g
Now you can substitute the values in the formula for percentage:
- % of substance = (1.73g / 6.00g) × 100 = 28.8%
The balanced equation is:
Then proceed with the following equations.
The answer is
.
Answer:
Explanation: Ethanol, CH3CH2OH, has the highest of the three boiling points because it has the strongest dipole–dipole forces between molecules due to hydrogen bonding. ... Dimethyl ether, CH3OCH3, has the second- highest boiling point because it has dipole–dipole forces between molecules.
Multiply first the mass given in kilograms by 1000 in order to convert it to grams.
(0.23 kg) (1000 g / 1kg) = 230 g
Then, divide the mass in gram by the molar mass of SO2
molar mass of SO2 = 64.044 g/mol
Solving for the number of moles,
(230 g)(1 mol/64.044g) = 3.59 moles
Thus, there are approximately 3.59 moles of SO2 present in 0.23 kg of SO2.