145 Answered Questions for the topic Chemistry Conversion

Chemistry Conversion

06/03/16

what is the number of moles of solute in 250 ml of a 0.4 M solution

molarity mass for chemistry question 
Chemistry Conversion Chemistry Chemistry Lab Chemistry Math

05/27/16

Chemistry lab help

I'm working on a lab and I need someone to explain how to calculate some of the data. If you could give me an example for each one I don't understand I would appreciate it so I can work out the... more
Chemistry Conversion Science Chemistry Physical Science

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?
Chemistry Conversion

05/20/16

Calculate the heat required to raise the temperature of 28.6 g of sodium from 33.7 °C to 73.8 °C.

help please

05/14/16

If the temperature of argon gas is 400 K and the average velocity of argon is twice that of radon what is the temperature of radon gas?

The answer key says it is 555 K. How do I approach this question? 
Chemistry Conversion

04/26/16

Marla drives her car to school each day. If it takes 12 minutes to drive one way, how many hours a week does Marla drive?

I've tried to multiply and divide all the numbers, yet all the answers I get are wrong.
Chemistry Conversion Chemistry

04/26/16

In mL, how much of 3Cu(PO4)2 and 2Na3PO4 will I need to make 10 grams of Cu3(PO4)2?

Balanced equation: 2Na3PO4(ac) + 3Cu(NO3)2(ac) = Cu3(PO4)2(s) + 6NaNO3(ac)   Na3PO4 molarity: (1.0 M) Cu(NO3)2: (5.0 M)   I don't know how to calculate how much of 2Na3PO4(ac) and... more
Chemistry Conversion

03/07/16

chemistry conversion

Please help thanks!   How many total atoms are there in 53.1 g of carbon monoxide (CO)?
Chemistry Conversion Chemistry Moles Liters

03/05/16

If I wanted to dilute a 6.2 L, 3M NaNO3 solution to make a 4.7M NaNO3 solution....

How many L of NaNO3 would I need to add?
Chemistry Conversion

02/24/16

Chemistry stoichiometry

if you start with 75 grams of Aluminum, how many grams of HBr would you need? 2Al+6Br->2AlBr3+3H2
Chemistry Conversion

02/14/16

Determine the mass of lysine needed to prepare 300. mL of a 0.150 m solution.

 Using milliliters and molality to determine mass
Chemistry Conversion

01/29/16

How many moles of nitrogen are in 64.3 moles of dinitrogen trioxide?

Help solve this 
Chemistry Conversion

01/29/16

What is the mass (in grams) of 9.56E+25 molecules of dinitrogen trioxide?

How do you do this
Chemistry Conversion

01/28/16

How many molecules are found in 295.3 grams of N4Cl2

need this in less than 10 minutes please
Chemistry Conversion

01/21/16

how many molecules are there in 3L of CCl4, at STP

how many molecules are there in 3L of CCl4, at STP
Chemistry Conversion Stoichiometry Chemical Formula

01/13/16

How many grams are formed?

Iron(III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3 are formed when 25.9 g of Fe reacts completely with oxygen? 4Fe(s) + 3 O2(g) → 2Fe2O3(s)  a.12.0... more
Chemistry Conversion

10/20/15

Based on the activity series provided, which reactants will form products?

  F > Cl > Br > I
Chemistry Conversion

10/18/15

balance c3h8+502> 3co2+ 4H20

balance c3h8+502> 3co2+ 4H20  

09/30/15

Describe the steps you would use to solve this problem.

In a scale drawing of a dining room floor plan, 10 mm equals 2 meters. If the homeowners wanted to purchase flooring that costs $10.89 per square yard, how much would they spend on flooring for the... more

09/27/15

PLEASE HELP!!!? Percent composition problem?

Silver is reacted with excess mercury (II) chloride, producing a solid silver chloride precipitate. If the actual yield of 25.5 g silver chloride represents a 77 percent yield, how much silver was... more

A sample of nitrogen gas, N2, contains 1.33 x 10 ^24 total atoms of nitrogen, N. How many moles of nitrogen molecules are present?

Can you please show your work? I keep trying a variety of different conversions, but I don't really even know where to start and how to get the correct answer. I would greatly appreciate any help -... more
Chemistry Conversion Chemistry General Chemistry

09/21/15

A sample of nitrogen gas, N2, contains 1.33 x 10^24 total atoms of nitrogen, N. How many moles of nitrogen molecules are present?

Can you please describe how you get your answer? I want to learn what the answer is and how to figure it out so I can know how to do similar problems in the future. Thank you for your help!

Perform a rxn to obtain 5 g ethyl bromide. Assuming that a normal percentage yield is 85%, what min quantity of materials needed to give desired product

Density of ethyl bromide is 1.47 g/cm3 Molecular mass of ethyl bromide is 108.97 g/mol   I need the answer in mL ethanol and mL phosphorus tribromide

09/20/15

How much PBr3 is required to react completely with 6.0 mL of ethanol?

this question is related to the balanced equation 3CH3CH2OH + PBr3 ----> 3 CH3CH2Br + H3PO3

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