Questions LLC
Login
or
Sign Up
Ask a New Question
Percentage composition
Page 3
Questions (131)
the mass of a certain mixture of BaO and CaO is found to be exactly one half that of the mixed sulfates formed from it by the
2 answers
asked by
jane
694 views
A 1.994 g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temp. above 170 C in a crucible until a
3 answers
asked by
neha
681 views
A 2.5g sample of impure Copper was analyzed by allowing it to react with 45mL of 5M Nitric Acid to form Copper (II) Nitrate,
2 answers
asked by
Delila
649 views
what is the percent (m/m) of argon gas in a mixture containing 45.0 grams of argon gas and 85.0 grams of helium gas
2 answers
asked by
Allisyn
610 views
3.0g of a mixture of potassium carbonate and potassium chloride were dissolve in a 250cm standard flask. 25cm of this solution
2 answers
asked by
CEO
619 views
A 1.27-g sample of a mixture of AgNO3 and NaNO3 is treated with excess Na2S(aq). The precipitate is filtered off, dried and
2 answers
asked by
martha
608 views
The theoretical percent of Copper (II)Oxide is 79.9%. What are two reasons why the percent of Copper in Copper (II) may vary
2 answers
asked by
Shaun
591 views
A solution contains H2O2 in water. Complete decomposition of the H2O2 in 170 g of this solution yields 5.6 L of O2(g), measured
2 answers
asked by
anon
587 views
Determine the percentage composition of each of the following compounds
a) NaCl b) AgNO3 c) Mg(OH)2 for NaCl i got na=23/135=0.17
2 answers
asked by
john
577 views
treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl.
how
2 answers
asked by
Martha
582 views
1.) A 3.000gram sample of a hydrate compound containing Co, C2O4, and H2O was combusted to give 1.316g of Co3O4. What is the
2 answers
asked by
Robert
568 views
A solution prepared by dissolving 20.2 mL of CH3OH in 100mL of water @ 25 celcius. The final volume of the solution is 118 mL.
2 answers
asked by
rita
553 views
Copper (II) fluoride contains 37.42% F. Given this information, determine the mass of fluoride in 70.23 g of copper (II)
4 answers
asked by
Anonymous
523 views
A sample of impure Limestone weighing 0.3440 g was treated with 50 mL of HCl 0.1363 mol/l. after elimination of all CO2 by
2 answers
asked by
Kelly
557 views
A student actually used 0.847g sample of impure KHP and the endpoint was reached after 19.82 ml of sodium hydroxide solution was
3 answers
asked by
BEE
530 views
I need to determine the "percentage composition unknown" whatever that is. My current data: a) mass of test tube and foil cover:
2 answers
asked by
Selina
509 views
In the chlorine titration of a solution prepared by the dissolution of 0.2110 g of commercial hypochlorite was spent 19.50 ML of
4 answers
asked by
kelly
502 views
what is the percent composition by mass of water in a compound with a gram formula mass of 4905 g/mol
4 answers
asked by
mike
492 views
calculate the percentage by mass of ozygen in trioxnitrate5 acid H-1, N-14, O-16
3 answers
asked by
Anonymous
450 views
What is the mass percent of oxygen in sodium bicarbonate (NaHCOĆ)?
1 answer
asked by
Anonymous
454 views
Find percentage composition of K2SO4 in alum.
3 answers
asked by
Raj
426 views
If 24.3 grams of an aqueous solution of aluminum iodide, AlI3, contains 6.56 grams of aluminum iodide, what is the percentage by
1 answer
asked by
Ebony
470 views
express this mass as a percentage of the weight of your sample of plant food. this is the % of elemental phosphorous in the
4 answers
asked by
Buzz
448 views
a solution of an unknown metal chloride (0.8870 g) was treated with silver nitrate to yield (1.9132 g). calculate the percentage
1 answer
asked by
TROUBLED
456 views
What is the percent of H in H2O2?
Responses 3% 3% 97% 97% 94% 94% 6%
1 answer
asked anonymously
12 views
What is the percent of Cu in CuBr2
1 answer
asked anonymously
7 views
A sample with a mass of 3.698 g consists of 64.93% tin and 35.07% sulfur. What is the molar ratio of sulfur to tin in the
1 answer
asked anonymously
28 views
What us the mass percent of hydrogen in water?
1 answer
asked anonymously
6 views
A commercial mouthwash contains 12.4 g of ethanol and 0.049 g of antiseptic in each 65. -mL portion. Calculate the
component. Be
1 answer
asked anonymously
40 views
A sample of a compound has a mass of 41.13 g. The sample is found to contain 37.28 g of carbon and 3.85 g of hydrogen. What is
1 answer
asked anonymously
14 views
Find the percentage composition of calcium in the following compound, round to the nearest hundredth of a percent.
1 answer
asked anonymously
6 views
Pages
1
2
3
Parent Categories (21)
Analytical Chemistry
Chemical Analysis
Chemical calculations
Chemical Composition
Chemical Compounds
Chemical Reactions
Chemical Reactions and Equations
Chemical Reactions/Calculations
Chemistry
Composition of Substances
Compound Composition
Concentrations and Solutions
elements and compounds
Gas Mixtures
Gases and Mixtures
Laboratory Techniques
Solutions
Solutions and Mixtures
Stoichiometry
Stoichiometry or Chemical Composition
Stoichiometry/Chemical Reactions