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Chemical calculations
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Questions (138)
a. What is the molecular weight of aspirin (C9H8O4)?
180.1574 amu b. What is the mass of 0.00785 mol of aspirin? 1.41 g c. How
3 answers
asked by
krystal
768 views
A sample of a compound of mercury and bromide with a mass of .389 was found to contain .111g bromine. Its molar mass was found
5 answers
asked by
sam
1,499 views
i don't understand any of this !
I'm doing the STP & stuff like that . The question is; How Many Molecules are contained in each
3 answers
asked by
Anonymous
962 views
How do I convert the following quantity to moles?
44.0g of H2O
4 answers
asked by
Brittany
533 views
hellppp please i have a test on this on mondayy im so screwed
A solid mixture contains MgCl2 and NaCl. When 0.5000 g of this
4 answers
asked by
yvonne
1,246 views
Please help me with these chemistry questions🙏
1. Calculate the pOH of 0.093 M LiOH. 2. Calculate the hydroxide ion
1 answer
asked by
Max
228 views
How do I calculate 220grams of c-14 to 55 grams of c-4?
1 answer
asked by
Rhonda
309 views
Calculate the weight of 6.022*10^23 molecules of caco3.
2 answers
asked by
Ajay marandi
477 views
How many particles are in 9.22 x 10^–37 mol of iron(III) oxide (Fe2O3)?
A. 5.54 x 10^12 mol Fe2O3 B. 1.60 x 10^23 mol Fe2O3 C.
6 answers
asked by
Michael
641 views
how would your calculation of the molarity of KMnO4 be affected if you had added twice as much sulfuric acid and water as was
2 answers
asked by
Anonymous
608 views
What is the volume of 454 grams of Ferrous sulphate heptahydrate?
1 answer
asked by
Will
352 views
calculate normality oh hcl ? given specific gravity 1.18 and w/w 36.5
2 answers
asked by
saabiq
457 views
Science: calc.the mass in gram of ammonium chloride with formulae mass 53.49g/mol that will be mixed in 1litre of distilled
1 answer
asked by
oluchi
437 views
How can I convert a rate constant from mol to t/M.I have 0.00012 mol of AcH
present at 5min .Know I want to calculate the
1 answer
asked by
becky
398 views
hi..can someone hwlp me out here on how we can calculate the moles of H2T(phthalic acid)?? its urgent for my lab this evening
1 answer
asked by
marcus
449 views
How many milligram of lysozyme (MW=14,600 g/mol) are needed to make 3 liters of a 10^-6 M solution?
1 answer
asked by
Kris
346 views
Calculate the molar mass of potassium hydroxide (KOH). How many atoms
would we find in a 100 mL solution of 1 µM KOH?
2 answers
asked by
Dermot
487 views
Calculate the pH of the resultant solution of mixing together two solutions of 2 L of 1.0 M acetic acid, 0.5 L of 1.0 M sodium
2 answers
asked by
Dre
799 views
I originally asked you the first question and I got the answer 7.7 but theres other parts to the problem but Im not sure what to
1 answer
asked by
Kelli
480 views
A freshman is currently enjoying the Arts Studio program she is pursing at a well-know university. In her free time, she like to
2 answers
asked by
Kameesha
631 views
5.82 g of CuNO3 is dissolved in water to make a 0.240 M solution. What is the volume of the solution?
2 answers
asked by
Anonymous
577 views
Calculate the pH of an aqueous solution of 0.15 M potassium carbonate.
I know that pH = -log(H30+) but I am not sure how to start
3 answers
asked by
Hannah
472 views
I need to calculate the molecular mass of ehtylene glycol based on the freezing point depression.
The teacher said that for
5 answers
asked by
Hannah
437 views
Posted by anne on Wednesday, February 15, 2012 at 3:20pm.
How to prepare 1L of 96% v/v ethanol from 99% v/v ethanol? Can you show
1 answer
asked by
anne
416 views
Hi, how do I calculate how many grams of unknown diprotic acid are needed to make 150mL of 0.750N (normal) solution?
and to make
2 answers
asked by
Ashley
556 views
Calculate Percent Composition of the Unknown Mixture :
Methanol BP 64.7 Toluene Bp 110.6
1 answer
asked by
john
488 views
I need to convert 0.17mg of NaCl to formula mass units. How would I go about that?
3 answers
asked by
Lindsey
320 views
Using the molarity of fromic acid (HCOOH): 0.1033
Calculate the percent by mass of fromic acid in unknown solution. Assume the
1 answer
asked by
Thao
478 views
An enzyme has one iron atom per molecule and contains .335% iron by mass. Calculate the molar mass of the enzyme
1 answer
asked by
Kamila
416 views
how to calculate the mole fraction to hexan.
Thanks
1 answer
asked by
Jan
404 views
how to I figure how much copper is in 2.154 gram of copper sulfide?
3 answers
asked by
Donna
359 views
what is the molar mass of a gaseous organic compound with a density of 3.38 g/L at 40oC and a pressure of 1.97 atm?
Ok, I am
1 answer
asked by
Michelle
458 views
How mush CaCl2, in grams, is needed to make 2.0 L of a 3.5M solution?
g CaCl2 = (2.0L) *( 3.5 mol Cl-/1L) * (1mol CaCl2/ 2mol
3 answers
asked by
Sydney
2,739 views
A chemistry student weighs out 0.123 grams of chloroacetic acid (HCH2ClCO2) into a 250. milliliter volumetric flask and dilutes
4 answers
asked by
Deborah
1,406 views
Calculate the mass in g of each of the following.
a. 2.3×10^22 H2O molecules b. 6.16×10^20 SO3 molecules c. 5.0×1025 O3
2 answers
asked by
Mely
1,308 views
What is the molar mass of KI(Potassium iodide)?
Here is a site for all your molar mass calculations.
1 answer
asked by
Bryan
1,295 views
A sample of lithium sulfate, LiSO4, contains 6.78 x 10^23 formula units.
a) How many moles of Li+ ions are there in the sample?
2 answers
asked by
Mimi
1,148 views
calculate the molecular weight of a substance which freezes forms a 7.00% by mass solution in water which freezes at -0.89°C.
2 answers
asked by
iain
1,052 views
How do you calculate the molar masses for Strontium Phosphate and Chromium(III)Nitride using significant figures correctly?
2 answers
asked by
Katie
1,010 views
calculate the mass percent of the following solutions 1.25 g CaCL2 in 35.0 g H2O
I am not sure if i have the correct set up
2 answers
asked by
ashley
1,003 views
Calculate the [H3O
+ ] for 0.42 M HCl. Answer in units of M.
2 answers
asked by
Brian
953 views
1. Convert 1.2 X 10^24 molecules of chlorine to grams.
Ans: 70.67 gms
2 answers
asked by
Anonymous
926 views
What volume of carbon tetrachloride (density = 2.71 g/mL) contains 2.46x10^25 chlorine atoms?
3 answers
asked by
Charles
898 views
How many grams of solid silver nitrate would you need to prepare 240.0mL of a 0.160M AgNO3 solution?
2 answers
asked by
Isa
889 views
What is the hydroxide ion concentration in mol/L of a solution if 0.080 grams of NaOH are dissolved in 2.0 liters of solution?
2 answers
asked by
Confused person
858 views
Commercial vinegar usually has a concentration of 5%, per volume.
a) Calculate the [H3O+] , if the density of acetic acid is
3 answers
asked by
Andrea
853 views
A sample of lithium sulfate, Li2SO4, contains 6.78 x 10^23 formula units.
a) How many moles of Li+ ions are there in the sample?
2 answers
asked by
Secila
866 views
How do I solve this?
How many grams of solid NaOH are required to prepare 200 mL of a 0.05 M solution? What will be the
2 answers
asked by
stew
777 views
Calculate the volume of 2 M acetic acid needed to prepare 50 ml of 0.1 M acetate buffer.
4 answers
asked by
Allie
675 views
Calculate the molar mass of baking powder (NH4)2CO3
2 answers
asked by
Tracey
646 views
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Parent Categories (4)
Chemistry
Science (or Chemistry)
Science and Chemistry
Stoichiometry