Tuesday
October 21, 2014

Homework Help: chem 3A

Posted by shylo on Friday, July 25, 2008 at 8:40pm.

please help me with these homework problems from chemistry because the teacher did not give enough information to some of these chemistry work problems.

1) 50.0 g of aluminum is reacted with excess sulfuric acid. The chemical equation for the reaction is:
2Al + 3H2SO4 --> Al2(SO4)3 + 3H2
If 58.7 L of H2 are collected over water at 20 degree C and 785 torr, what is the mass percent yield?
(Vapor pressure of water at 20 degree C is 17.5 torr.)

2) What is the density of hydrogen, in g/L, under lab conditions? Under STP conditions?

3) Carbon monoxide can be reacted with hydrogen to produce methanol. The chemical equation for the reactions is:
CO(g) + 2H2 --> CH3OH(g)
If 52.10 L of hydrogen gas at STP is completely reacted with excess carbon monoxide gas,what volume in liters of methanol st STP will be produced?

4) The 4.25 grams of sugar (C6H12O6) reacts with sufficient oxygen to produce 3340 mL of carbon dioxide collected over water at 751.9 mm Hg at 24 degree C. Vapor pressure of water at 24 degree C is 22.4 mm Hg. What is the percent yield?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

fractions - my teacher gave us some fraction problems for homework, but I'm ...
math - So I've been having trouble solving some problems. Mainly problems that ...
Math - Kenneth has 22 math problems to do for homework. He has 12 problems done....
Statistics - I'm looking for some help with my statistics homework...I'm good ...
problems faced in conserving kalimantan rainforest - i need to know what are ...
Chemistry - Okay, in this prolem i need to balence this equation. Even our ...
Algebra - Here is the problem: A two-digit number is eight times the sum of its ...
Algebra - Here is the problem: A two-digit number is eight times the sum of its ...
chemistry - atoms of the same element with different atomic masses are called ...
Social Studies - Please Help I know but please I'm the parent and my son tell me...

Search
Members