1) Chemical equation
H2 (g) + Br2 (g) ---> 2 HBr
2) molar ratios
1 mol H2 : 1 mol Br2 : 2 moles HBr
3) convert 30.0 g of H2 to number of moles
moles = mass in grams / molar mass = 30.0 g / 2.02 g/mol = 14.85 moles
4) calculate theoretical yield
2 moles HBr / 1 mol H2 = x / 14.85 moles H2
=> x = 14.85 moles H2 * 2 moles HBr / 1 mol H2 = 29.7 moles HBr
5) convert 59.52 moles HBr to mass
mass = number of moles * molar mass = 29.7 moles * 80.91 g /mol = 2403.03 g
6) percent yield = (actual yield / theoretical yield) * 100 = (85.00g / 2403.03g)*100 = 3.54%
Answer: 3.54%
Electricity from renewable resources such as solar, geothermal, and wind generally does not contribute to climate change or local air pollution since no fuels are combusted.
Answer:
i was thinking it would be best to use dish cloth
Explanation:
if u just use a plastic scrubber to wash dishes than it would be most likely to make it more duty than using a cloth however it is clean only problem for dish cloth is after using it for 2 or 3 months most likely two you would have to wash i know this because I've done it before and i found out that dish cloth is much better and safer to use. i pray i got the right answer if not hey i was just trying to help y'all its alright with me
Answer:
components of a nucleotide - DNA and RNA
Answer:
its B. O3 + ClO → 2O2 + Cl
Explanation:
I just took the test and got it right