426 Answered Questions for the topic stoichiometry

04/02/17

How much Al must be used to react with 652 g of NH4ClO4?
3Al(a) + 3NH4ClO4(s) = Al2O3(s) + AlCl3(s) + 3NO(g) + 6H2O (g)
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Stoichiometry Chemistry

04/02/17

How many grams of SiCl4 are needed to make 9.3 g of Si ?
SiCk4(g) +2Mg(a) =2MgCl2(aq) +Si(s)
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Stoichiometry Chemistry

04/02/17

How many liters of CO2 at STP are produced by completely burning 18.8 L of CH4?
CH4(g)+2O2(g)=CO2(g) +2H2O(g)
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Stoichiometry Chemistry

04/02/17

120 grams of magnesium are burned in a chlorine atmosphere (Mg + Cl2 -> MgCl2 )
how many moles of magnesium of present  a 0.20 b1.26 c2.50 d5.00    
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Stoichiometry Chemistry

04/02/17

76.68 grams of sodium chlorate are decomposed (2NaClO3->2NaCl +302)
how many moles of oxygen are formed? a. 0.36 b. 0.54 c. 1.06 d. 2.50
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Stoichiometry Chemistry Helpful Tips

04/02/17

How many liters of CO2 at STP are produced from the complete combustion of 23.2 g C4H10?
What volume of oxygen will be required ?
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Stoichiometry Chemistry Helpful Tips

04/02/17

How many liter of CH4 at STP are required to completely react with 17.5 L of O2
CH4(g)+2O2(g)=CO2(g)+2H2O(g)
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Stoichiometry Chemistry Stoichiometery

03/27/17

Got a Chemistry Stoichiometry Problem.. Please Help!
Question: The final step in manufacture of pure platinum (for use in automobile catalytic converters and other purposes) is the decomposition reaction of (NH4)2PtCl6. In addition to the solid... more
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Stoichiometry Chemistry

03/15/17

Show how mass is conservered in the following
Show how mass is conserved in the following equation. Show math. 3 Ag2SO4(aq) + 2 Ni(s) ---> Ni2(SO4)3(aq) + 6 Ag(s)
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Stoichiometry

02/15/17

"Mg(s) + 2HCl(aq)=MgCl2(aq) +H2(g)
so theres like 2 parts to this question,   a. How many grams of HCl are consumed by the reaction of 5.13 moles of magnesium? b. Whatis the mass in grams of H2 gas when 1.62 moles of Hcl is added to... more
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Stoichiometry

01/20/17

If 5.31 grams of H2 reacts according to the equation 3 H2 + N2 NH3, how many moles of NH3 are produced?
Answer in units of moles 
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Stoichiometry Chemistry

12/13/16

how many moles of O2 will react with 0.950moles of C3H6? 2C3H6+9O2=>6CO2+6H2O
this is stoichiometry and chemistry and is difficult. please show me how to find the answer
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Stoichiometry Chemistry

11/10/16

Engine Temperature
In an engine, air is at 1x102kpa and a temperature of 298.15K in a cylinder volume of 0.400L. The air is then compressed to 0.050L volume and pressure of 2.5x103kpa. Assume number of moles is... more
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Stoichiometry Chemistry

11/10/16

Octane and Carbon dioxide
a)   How many grams of CO2 would be produced if 12 grams of octane reacts with an excess of oxygen?  balanced  2C8H18 + 25O2 --> 16CO2 + 18H2O     b) What volume will the CO2 gas collected... more
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10/09/16

Stoiciometry
A solution was prepared by dissolving 4.75g of sodium chloride and 0.575g of calcium chloride in water and diluting to a volume of 500.0mL. What is the molarity of chloride ions in this solution?
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10/09/16

Stoiciometry
What volume of 0.100 M barium chloride contains 0.125g of barium chloride?
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Stoichiometry

09/20/16

how many moles of oxygen would react with .425 mol C4H10
use the equation 2C4H10+13O2----->8CO2+10H2O  
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Stoichiometry

08/02/16

What mass of acetic acid is produced by the reaction of 1.6g of oxygen gas?
 how do you do this problem?????????
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Stoichiometry Science Chemistry Chem

07/26/16

How much CaCl2 needs to be added to change the concentration of Ca from 100mg/L to 200mg/L?
Question: I have 275 gal of water. Ca concentration is 100mg/L. How much CaCl2 is needed to be added for Ca to become 200mg/L?   I understand that you should convert mg to grams, and doing so... more
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Stoichiometry Chemistry

06/01/16

What is the mass of 4.00 mol of Ca3(PO4)2
What is the mass of 4.00 mol of Ca3(PO4)2
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Stoichiometry Chemistry Molarity Molality

05/28/16

Stoichiometry
Molarity and molality of a solution (molecular weight=50) in aqueous solution is 9 and 10 respectively. What is its density?
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05/23/16

What is the % Sn and % Cu in the sample?
You are given a piece of metal alloy that is made of tin and copper. If the density of the sample is found to be 8.59 g/mL what is the % Sn and % Cu in the sample?
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04/07/16

How many moles of iron are needed to form 8 moles of iron lll oxide? With 4 Fe + 3 O2 = 2 Fe2O3
 i really just don't understand how to do these problems :/
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Stoichiometry Chemistry

04/07/16

Mg+2NaF=MgF2+2Na If there is 15.00 grams of magnesium in the reaction, what quantity of sodium will be produced
Chemistry lab i need help with and need the answer  a)14.18 g  b)22.99 g c)24.31 g d) 28.37 g   and help would be greatly appriciated thank uou so so much 
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Stoichiometry

04/06/16

How many moles of ca(oh)2 will be produced from 14.5 moles of caso4
I really need to know the answer and the work  shown 
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