320 Answered Questions for the topic stoichiometry

10/15/15

Enthalpty stoichiometry problem?? PLEASE help??!!

The value of H for the reaction below is -72 kJ. _______kJ of heat are released when 1.0 mol of HBr is formed in this reaction. H2 (g) + Br2(g) => 2HBr (g) I tried to solve it.. 1.0 mol HBr (-72... more

10/10/15

Can you help me with this volumetric stoichiometry problem?

How many grams of chlorine has would be produced is 250 mL of 2.00M HCl was mixed with an excess of bleach, according to the equation below?    NaClO (aq) + HCl (aq) => Cl2 (g) + NaOH... more

A sample of nitrogen gas, N2, contains 1.33 x 10 ^24 total atoms of nitrogen, N. How many moles of nitrogen molecules are present?

Can you please show your work? I keep trying a variety of different conversions, but I don't really even know where to start and how to get the correct answer. I would greatly appreciate any help -... more
Stoichiometry

05/21/15

Stoichiometry help find Molarity of NaOH

you are reacting a 1M HCl solution with a sodium hydroxide solution of unknown concentration. if it takes 20.0 ml of the acid solution to react with 35 ml of the NaOH solution, what is the molarity... more
Stoichiometry

05/21/15

if 34.19 grams of sodium chloride reacts with excess silver nitrate, how many grams of silver chloride can be produced?

I need the balanced equation and type of reactio. Showing all work 
Stoichiometry College Chemistry

03/17/15

AgNO3(aq)+KCl(aq)?AgCl(s)+KNO3(aq)

Part AWhat mass of silver chloride can be produced from 1.19L of a 0.293M solution of silver nitrate?Express your answer with the appropriate units.mass of AgCl =Part BThe reaction described in... more
Stoichiometry

02/12/15

How many grams of water can be produced by the reaction of 2.16 mol C2H2 with 7.40 mol of oxygen gas?

The heat from an acetylene torch is produced by burning acetylene (C2H2) in oxygen:2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g)How many grams of water can be produced by the reaction of 2.16 mol C2H2... more
Stoichiometry

11/25/14

In the reaction: 2PbCl2+ O2 -----> 2PbO + 2Cl2, how many grams of PbO are produced when 4.5 moles of PbCl2 are reacted with excess oxygen?

Chemistry practice problem. Would like to know if I am right so far.

How many grams of Lithium Nitrate are needed to make 250 grams of Lithium Sulfate?

Could someone please look over my work?  I had to research Stoichiometry as a self-study and I'm not sure if I'm on the right track.   The question is: How many grams of Lithium Nitrate are... more
Stoichiometry Chemistry

11/07/14

how many grams of sodium sulfate will be formed if you start with 200 grams of sodium hydroxide and you have an excess of sufuric acid

I had this problem explained to me, I followed the instructions and I'm now checking for comprehension.   If someone could look this over and give me feedback it would be great.  One of the... more
Stoichiometry Chemistry

11/07/14

Why are we multiplying by eleven or why are we not multiplying 4.5 moles of heptane by 22??

Original question: In a particular reaction, 4.5 moles of heptane burn in the presence of oxygen. C7H16 + 11O2 -> 7CO2 + 8H2O How many moles of oxygen will burn?Answer:You have 4.5 moles of... more
Stoichiometry Chemistry

11/07/14

How many moles of oxygen will burn?

In a particular reaction, 4.5 moles of heptane burn in the presence of oxygen.   C7H16 + 11O2 -> 7CO2 + 8H2O How many moles of oxygen will burn?   REACTANTS: Carbon: 7 Hydrogen:... more
Stoichiometry Chemistry Chemistry Lab

10/31/14

Chemistry problem I am stuck! Please help!

If .240 g of an unknown triprotic acid (H3X) requires 18.00 mL of a .500 M NaOH solution for neutralization, what is the molecular weight of the acid? If it is a common phosphorous containing... more

08/22/14

Chemistry Problems

1.) Elemental phosphorus reacts with chlorine gas according to the equation: P4(s)+6Cl2(g)→4PCl3(l) A reaction mixture initially contains 45.09g P4 and 131.1g Cl2.   Once the reaction has... more
Stoichiometry Chemistry Problem

04/19/14

Equal weights of zinc and iodine react to form ZnI2 find the maximum weight ZnI2formed if 1gm of each was taken initially

Equal weights of zinc and iodine react to form ZnI2 find the maximum weight ZnI2formed if 1gm of each was taken initially. Please answer me fast.
Stoichiometry

02/23/14

if 5.67 moles of Fe were produced, how many moles of CO2 would be produced?

given the balanced equation of Fe2O3 + 3CO → 2Fe + 3CO2 If 5.67 moles of Fe were produced, how many moles of CO2 would be produced?
Stoichiometry

01/21/14

i need help with stoichemtry Li3N+3H2O-->NH3+3LiOH

how do you do stoichiometry
Stoichiometry

10/28/13

How many grams of water will be produced from 32 grams of oxygen gas

how do I set up the problem

02/07/13

what's the easiest way to balance chemical equations?

i need help♥
Stoichiometry Chemistry

12/06/12

Can someone please check my work and answers on these two titration problems?

1.)  If 16.45 mL of 0.135 M nitric acid neutralizes 26.0 mL of ammonium hydroxide, what is the molarity of the base? HNO3(aq) + NH4OH(aq) --> NH4NO3(aq) + H2O(l) I used stoichiometry to find... more

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