Hey there!
In order to solve for the percentage of water in the compound, you will first need to find its total molar mass. You can do this by adding up the molar masses of each individual element in the compound. Then, you will divide the mass that you find of the water molecules by the total mass to get the percentage.
→ Na₂CO₃ ×<span> 10 H</span>₂<span>O
</span>→ Na₂ = 22.9898 × 2 = 45.9796
→ C = 12.0107
→ O₃ = 15.999 × 3 = 47.997
→ 10 H₂O = 18.015 × 10 = 180.15
Now, just add all of those numbers up for the total molar mass.
→ 45.9796 + 12.0107 + 47.997 + 180.15 = <span>286.1373
</span>
The last step is to divide the molar mass of the 10 water molecules by the total mass.
→ 180.15 ÷ 286.1373 = <span>0.62959 </span>≈ 0.63
Your answer will be about 63%.
Hope this helped you out! :-)
Answer:
Theoretical yield of C8H8BrNO:
In moles
0.000945
In grams
0.204
Explanation:
Theoretical yield of a reaction is defined as the quantity of the product obtained from the complete conversion of a limiting reactant in a chemical reaction. Theoretical yield can be expressed as grams or moles.
Equation of reaction:
C8H9NO + Br2 --> C8H8BrNO + HBr
Since C8H9NO is the limiting reagent, 1 mole of C8H9NO reacted to form 1 mole of C8H8BrNO
Mass of C8H9NO = 129 mg
= 0.129 g.
Molar mass of C8H9NO = 135.17 g/mol.
Number of moles of C8H9NO = mass/molar mass.
= 0.129/135.17
= 0.00095 moles of C8H9NO
Since 1 mole of C8H9NO yielded 1 mole of C8H8BrNO
Therefore, 0.000954 moles of C8H8BrNO
Theoretical yield (in grams) = molar mass * number of moles
= 214.06 * 0.00095
= 0.204 of C8H8BrNO
Answer:
C.
Explanation:
if I am wrong I am so sorry
A decrease in the amount of gas in a container will mean a decrease in pressure.
Answer:
European Union was on grand committee
