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Percent Composition
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Questions (169)
1.30 grams of chromium reacts with 9.5 grams of iodine. What is the percent of chromium in this compound? How do I work out this
3 answers
asked by
Quick chem question
794 views
a mixture containing only bao and cao weighs 2.00 g the oxides are converted to the corresponding mixed sulfates, which weigh
2 answers
asked by
Anonymous
112 views
36.) Suppose a chemistry student discoveres that a block of pure ice is left on her porch as she goes to school one day. What
1 answer
asked by
Sam
396 views
need help on a lab
here are the results Mass of empty beaker and glass rod(62.62) Mass of beaker, glass rod, hydrated copper
5 answers
asked by
Katherine
668 views
Find the percent composition of a compound containing sodium and chlorine if 24.34g of the compound contains 13.45g of sodium.
My
4 answers
asked by
Christina
676 views
What is the mass percent of sodium in NaCl?
3 answers
asked by
Anonymous
305 views
A student wanted to determine the amount of copper in a sample of copper ore. The student
dissolved a 2.500 ± 0.001 g piece of
2 answers
asked by
Anonymous
1,145 views
you are given a solid that is a mixture of na2s04 and k2s04. A 0.215g sample of the mixture is dissolved in water. An excess of
4 answers
asked by
Ken Hung
513 views
0.224g sample the contained only bacl2 and kbr required 19.7ml of 0.1M agn03 to reach the end point. Calculate the percent of
3 answers
asked by
Fai
409 views
A 37.2 g of iron ore is treated as follows. The
iron in the sample is all converted by a series of chemical reactions to Fe2O3.
2 answers
asked by
Anonymous
542 views
a .2280g sample contained only NaCl and KBr. it was dissolved in water and titrated with a 0.04799M of AgNO3. complete titration
2 answers
asked by
Lana
537 views
1. Identify the percent composition of sodium carbonate.
2. Determine the percent composition of calcium in calcium carbonate.
3 answers
asked by
jezzaD.
625 views
What is the percent mass of KClO3 in a mixture if the original starting material weighted 3.58(g) and the mass of KClO3 in
2 answers
asked by
Kim Jones
649 views
Help Please?
In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass
1 answer
asked by
Kelli
463 views
Calculate Percent Composition of the Unknown Mixture :
Methanol BP 64.7 Toluene Bp 110.6
1 answer
asked by
john
488 views
A 1.25-g sample contains some of the very reactive compound Al(C6H5)3. On treating the compound with aqueous HCl, 0.951 g of
5 answers
asked by
Jen
2,158 views
What is the percent bromine in a compound made of 1g of hydrogen and 80g bromine?
1 answer
asked by
nique
432 views
What is the composition of 21 g NaCl in 500 ml solution (density 1.12 g/ml) in % (w/w)?
1. 0.375% 2. 21.25% 3. 3.75% 4. 4.75% 5.
1 answer
asked by
Anonymous
417 views
Do my answers look correct for these? Thanks
Calculate the mass percent of a solution containing 45.6 grams ethanol (C2H6O) in
1 answer
asked by
Matt
871 views
I figured out this percent composition problem and I got REALLY close answers, so I wanted to check in with someone to confirm
1 answer
asked by
Jenn
438 views
I figured out this percent composition problem and I got REALLY close answers, so I wanted to check in with someone to confirm
1 answer
asked by
Jenn
397 views
A compound contains 60.0 grams carbon and 12.0 grams hydrogen
1) what is the percent of carbon in compound? 2) what is the
1 answer
asked by
Gianna
365 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
Sarah
1,139 views
A 46.9 g of iron ore is treated as follows. The iron in the sample is all converted by a series of chemical reactions to Fe2O3.
3 answers
asked by
Anonymous
3,427 views
what is the percent by mass of oxygen in propanal, CH3CH2CHO?
the answer is 27.6 %. but i need to know why, please help !
3 answers
asked by
lisa
2,749 views
Hi, I'm doing a chem lab of the Percent Composition of Potassium Chlorate-A Gas Law Experiment and we need to calculate the
4 answers
asked by
Katelyn
2,293 views
The percentage composition of chlorine, by mass, in the compound K2PtCl4 is
3 answers
asked by
christine
2,014 views
An 0.850 g sample of a mixture of LiH and CaH2 was reacted with H2O and the H2 gas produced, 1.20 L, was collected at STP. What
4 answers
asked by
ayo
1,819 views
A 2.914 gram sample of gypsum, a hydrated salt of calcium sulfat, CaSO4, is heated at a temperature greater than 170 degrees
4 answers
asked by
Sara
1,726 views
Thanks in advance.
A student prepared a solution of NaCl by dissolving 55.0 grams of sodium chloride in 570 mL of water. What is
2 answers
asked by
Dalal
1,303 views
Calculate the percent composition by mass of each element in Al(OH)3
Use at least 3 significant figures. %Al = %O = %H=
2 answers
asked by
Jerry
1,189 views
9.03 of Mg combine completely with 3.48g of N to form compound. what is the percent composition of each element in this
2 answers
asked by
kim
1,156 views
calculate the percent water in CaSO4*2H20
20.9%?
2 answers
asked by
c
1,094 views
A mixture of KCI and KClO3 weighing 1.80g was heated. The dry O2 generated occupied 140ml at STP. What percent of the original
2 answers
asked by
Lisa
1,052 views
please check my answers. THANK YOU.
1) The percent by mass of carbon in acetone, C3H6O is. Answer: 62.1% 2) What is the percent
1 answer
asked by
anonymous
1,068 views
If 32.3 grams of KCl are dissolved in 192 grams of water, what is the concentration of the solution in percent by mass?
5.94% KCl
2 answers
asked by
Acasia
1,005 views
what is the percent by mass of nitrogen in (NH4)2CO3? how do you do this ?
2 answers
asked by
natalia
984 views
Describe how you could find the % by mass of water in the hydrate CuSO4Ÿ5H2O assuming that you
did not already know the
2 answers
asked by
Susan
952 views
I'm trying to figure out the percent composition of a mixture of an unknown (a combination of NaHCO3 and NaCl).
Here's my data:
2 answers
asked by
Liam
919 views
In a previous experiment, 0.800 g of the green complex iron salt was placed in an Erlenmeyer flask and heated with concentrated
2 answers
asked by
Linda
910 views
Calculate the percent by mass of the solute in each of the following aqueous solutions.
(a) 5.10 g of NaBr in 78.2 g of solution
2 answers
asked by
katiy
894 views
A compound is formed when 12.2 g Mg combines completely with 5.16 g N. What is the percent composition of this compound? Please
7 answers
asked by
Anonymous
837 views
Calculate %tage by mass of all component element NaNo3 given,(Na=23,N=14,o=16)
4 answers
asked by
Elijah
829 views
A 1.00 g sample of enriched water, a mixture of H2O and D2O, reacted completely with Cl2 to give a mixture of HCl and DCl. The
2 answers
asked by
Adam
826 views
An ore contains Fe3O4 and no other iron. The
iron in a 51.98 gram sample of the ore is all converted by a series of chemical
2 answers
asked by
Anonymous
780 views
What is the percent by weight of a solution prepared by dissolving 25 g of NaCl in 150 g of water? What is the volume of water
2 answers
asked by
Hannah
763 views
An impure sample containing an unknown amount of gallium bromide, GaBr3, weighs 0.379 g. It was dissolved in water and treated
1 answer
asked by
Hannah
719 views
An 0.850 g sample of a mixture of LiH and CaH2 was reacted with H2O and the H2 gas produced, 1.20 L, was collected at STP.
What
1 answer
asked by
Benjamin
708 views
Determine the percent by mass of water in your sample of hydrated copper (II) sulfate - CuSO4. xH2O
My work I got 10% is this
2 answers
asked by
Kiki
726 views
A 18.2 g sample of an unknown compound contains 0.7 g of oxygen. What is the percent by mass of oxygen in the compound?
2 answers
asked by
lea
693 views
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Acid-base reactions
Acids and Bases
Analytical Chemistry
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