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Recent questions tagged chemistry

+1 vote
1 answer
Given the following equation.

8 Fe +S_8 \rightarrow 8 FeS

What mass of iron is needed to react with 16 g of sulfur?

asked Jul 21, 2015 in Chemistry by jan (1,600 points)
+1 vote
1 answer
Given the following equation

Na_2O + H_2O \rightarrow 2NaOH

How many grams of NaOH is produced from 1.2 x 102 grams of Na2O?

asked Jul 21, 2015 in Chemistry by jan (1,600 points)
0 votes
1 answer
Given the following equation.

2 K +Cl_2 \rightarrow 2KCl

How many grams of KCl is produced from 2.5 g of K and excess Cl2?

asked Jul 21, 2015 in Chemistry by jan (1,600 points)
0 votes
1 answer
Given the following equation.

2 KClO_3 \rightarrow 2KCl +3O_2

How many moles of O_2 can be produced by letting 12.00 moles of KClO3 react?

asked Jul 21, 2015 in Chemistry by jan (1,600 points)
0 votes
1 answer
asked Jul 20, 2015 in Chemistry by sterling (1,560 points)
0 votes
1 answer
Which of the following molecules has a dipole moment of zero?

A) C6H6 (benzene)

B) NO

C) SO2

D) NH3

E) H2S

asked Jul 20, 2015 in Chemistry by sterling (1,560 points)
0 votes
0 answers
Which of the following is lower for a 1.0-molar aqueous solution of any solute than it is for pure water?
A) pH B) Vapor pressure C) Freezing point D) Electrical conductivity E) Absorption of visible light
asked Jul 19, 2015 in Chemistry by sterling (1,560 points)
0 votes
1 answer
0 votes
2 answers
Stoichiometry: Balance the following equation.

_ BCl3(g) + _ H2(g)  → _ HCl(g) + _ B(s)

asked Jul 11, 2015 in Chemistry by george (1,640 points)
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