426 Answered Questions for the topic stoichiometry

Stoichiometry Math Chemistry Biochemistry

09/21/20

need help with a homework problem, very advanced
Guanine is an essential component of DNA. It contains the elements carbon, hydrogen,nitrogen and oxygen. When 615 mg of guanine is burned, 895 mg of carbon dioxide and 183 mgof water are formed. In... more
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09/21/20

why do you assume 100 g of a substance when given percentages?
when given a problem and the elements of a compound are given in percentages, i don't understand why you can just assume that it's 100g of the compound. why couldn't it be 200g or 700g of the... more
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Stoichiometry Science Chemistry Homework

09/11/20

If you burn 33.7g of hydrogen and produce 301g of water, how much oxygen reacted?
In the combustion of hydrogen gas, hydrogen reacts with oxygen from the air to form water vapor.Hydrogen + Oxygen —> WaterIf you burn 33.7g of hydrogen and produce 301g of water, how much... more
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Stoichiometry Chemistry

09/11/20

8 stoichiometry questions

1) Sulfur burns in excess air to form sulfur dioxide according to the equation: S(s)+O2(g)-> SO2(g)What volume of sulfur dioxide is produced (at room temperature and pressure) from 24g of... more
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Stoichiometry Chemistry

06/28/20

How many grams of barium salt are produced when a solution containing 42.3 g of Barium nitrate is mixed with a solution containing excess sodium chloride?
Barium nitrate (Ba(NO3)2) reacts with sodium chloride (NaCl) in a double replacement (displacement) reaction, shown below. Ba(NO3)2(aq)+NaCl(aq)-->???Use 261.34 as the molar mass for barium... more
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Stoichiometry Chemistry

06/17/20

What is the mass of NaCl produced when 2.0 moles of chlorine gas are reacted with excess sodium? 2 Na + Cl2 -> 2 NaCl

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Stoichiometry Chemistry

06/16/20

What is the mass of hydrogen produced when 8.0 g of sodium reacts with an excess water to produce hydrogen and sodium hydroxide? 2 Na + 2 H2O -> 2NaOH + H2 (Please help, thank you!)
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Stoichiometry Chemistry

06/16/20

What is the mass of NaCl produced when 2.0 moles of chlorine gas are reacted with excess sodium? 2 Na + Cl2 -> 2 NaCl (Please help, thank you!)
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Stoichiometry Chemistry

06/16/20

How many moles of oxygen are required to burn 3.0 mole of C10H8 (naphthalene)? (Please help, thank you!)
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Stoichiometry Science Chemistry

05/30/20

what would the right answer be

Gold dissolves in the acid mixture known as aqua regia according to the following balanced reaction: Au + HNO3 + 3 HCl --> AuCl3 + NO + 2H2O If... more
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Stoichiometry Chemistry

05/16/20

How many mL of 1 M HNO3 are needed to neutralize 500 mL of 2.0 M Ca(OH)2?
HNO3****Ca(OH)2********
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Stoichiometry Chemistry Grams To Grams

05/12/20

URGENT!! TELL ME THE FORMULA

on a glass of 20g of copper oxide(II) is added 0.2dm3 h2so4,caclulatr the amount of CuSO4 formed by this reaction?
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Stoichiometry Chemistry Moles

05/02/20

Calculate mass in g of Cu(OH)2 left behind after incomplete heating?
12.07g of CuSO4*5H2O is reacted with enough NaOH to completely precipitate Cu(OH)2. The Cu(OH)2 is not heated long enough, so exactly 35.27 percent of Cu(OH)2 is converted to CuO. How much Cu(OH)2... more
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Stoichiometry

05/01/20

How many grams of mgcl2 will be produced from 12g of mg(oh)2 and 42g of hcl
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Stoichiometry Chemistry

04/28/20

How much sodium hydroxide must you start with to yield 145 g of aluminum hydroxide
given the equation: Al2(SO3)3+ 6NaOH ----> 3Na2SO3 + 2Al (OH)3 and you start with 389.4 g of Al2(SO3)3 and isolate 212.4 g of Na2SO3 How much sodium hydroxide must you start with to yield 145 g... more
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Stoichiometry Chemistry Limiting Reagent

04/27/20

How many grams of Fe2O3 will be produced from 24 g of Fe and 5g of O2
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Stoichiometry Chemistry

04/25/20

How many grams of water are produced when 3.56 grams of pentane (C5H12) burn with excess oxygen?
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Stoichiometry Chemistry

04/23/20

Chem Stoichiometry multiple choice question

How many moles of potassium iodide, KI, are required to precipitate all of the lead (II) ion from 25.0 mL of a 1.6 M Pb(NO3)2 solution?a.) 0.64 molb.) 0.080 molec.) 0.040 moled.) 064 mole.) 0.020 mole more
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Stoichiometry Chemistry

04/23/20

Theoretical yield

What is the theoretical yield of H2O (MM=18) produces by burning 150g of C2H6 (MM=30) and enough O2 to allow for complete reaction. If the actual yield of H2O was found to be 135g of H2O, what is... more
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Stoichiometry

04/23/20

STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEMICAL REACTIONS
Ammonia gas can be prepared by the reaction of a metal oxide such as calcium oxide with ammonium chloride.CaO(s) + 2NH4CI(s) --> 2NH3(g) + H2O(g) + CaCl2(s)If 269g of CaO and 415g of NH4Cl  are... more
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Stoichiometry

04/23/20

STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEMICAL REACTIONS
What volume of 0.124 M NaOH , in milliliters, contains 30.0 g of NaOH ?Volume= ___ mL
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Stoichiometry Chemistry Gas Concepts

04/22/20

In the reaction between Al and HCl, if 1.32 g Al were reacted with excess hydrochloric acid, how many mL of Hydrogen gas could theoretically be emitted at STP?
In the reaction between Al and HCl, if 1.32 g Al were reacted with excess hydrochloric acid, how many mL of Hydrogen gas could theoretically be emitted at STP?the balanced equation should be:2 Al +... more
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Stoichiometry Science Chemistry

04/22/20

What mass of iron(III) chloride is produced when 100.0 mL of 0.100 M solution of barium chloride is reacted with 50.00 mL of 0.150 M solution of iron(III) sulfate?What's the limiting, excess reactant?
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Stoichiometry Science Chemistry Moles

04/22/20

How many atoms are there in 0.228 moles of water?
using dimensional analysis?
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Stoichiometry Science Chemistry Moles

04/22/20

How many molecules of nitrogen are there in 7.55 moles of N₂?
using dimensional analysis?
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