321 Answered Questions for the topic Chemistry Lab

Chemistry Lab Math Mass Kilograms

02/17/16

Specific Gravity/Mass PLEASE HELP URGENTTTT!!
The specific gravity of blood at 20 degrees Celsius is given as 1.028. Determine the mass of 1.50 litres of blood in grams and kilograms
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02/08/16

What does a double-headed arrow mean in a chemical equation?? PLEASE HELP!!! I AM LOST?
I am doing a lab where the chemical reaction is Fe^+3 (aq) + NCS^-1 (aq)<---      FeNCS^+2 (aq)                                                                                                  ... more
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02/08/16

reaction of amines at equations
Write a skeletal equation for the reaction of phenylamine with sodium nitrate (III) in water, and then show how this diazonium salt reacts with the naphan-2-ol ion in a coupling reaction.
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02/08/16

skeletal equation of carboxylic reactions
Write a skeletal equation for the reaction of ethanoyl chloride with phenyl amine (represented as R-NH2). What is the chemical term for the bond formed between the two reagents? What term might... more
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02/03/16

Rock 1 - volume= 15cm3, mass=45g, and density=3.0g/cm3. Rock 2- volume=30cm3, mass=60g, and density=2g/cm3. Which is more dense and which one is heavier?
Specific Gravity and Density
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Chemistry Lab Chemistry Specific Gravity

02/03/16

What is the weight in grams of 300 mL of alchohol with a specific gravity of 0.8?
CHemistry problem dealing with specific gravity. 
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Chemistry Lab Chemistry Specific Gravity

02/02/16

It has a mass of 126 g. You submerge it to find it displaces 422.0 mL of water. What is the specific gravity of the piece?
In need of help asap.   
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01/20/16

CHEMISTRY PLEASE HELP!!!!!!! Calculate the concentration of a crystal violet solution prepared by diluting 4.0 mL of 1.0 x 10^-4 M crystal viole...
Calculate the concentration of a crystal violet solution prepared by diluting 4.0 mL of 1.0 x 10^-4 M crystal violet with 2.0 mL of 0.100 M NaOH and 4.0 mL of distilled water.    I am so so so... more
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01/20/16

CHEMISTRY PLEASE HELP!!!!!!! Calculate the concentration of a crystal violet solution prepared by diluting 4.0 mL of 1.0 x 10^-4 M crystal viole...
Calculate the concentration of a crystal violet solution prepared by diluting 4.0 mL of 1.0 x 10^-4 M crystal violet with 2.0 mL of 0.100 M NaOH and 4.0 mL of distilled water.    I am so so so... more
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Chemistry Lab

01/20/16

Chemistry help?
how does the volume (ml) of water absorbed by sodium polyacrylate relate to the amount (ppm) dissolved solids present?
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01/19/16

Chemistry lab question? Making a solution??? Please help!!
Starting with solid sodium chloride, how would you make one liter of 2.000 ppm (parts per million) sodium chloride solution?   tip: 1 ppm = 1 g solute/10^6 g solution , for dilute aq solutions 1... more
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Chemistry Lab Chemistry

01/18/16

prepare 5 ml of 1 mol/L benzene solution in hexane?
 prepare 5 ml of 1 mol/L benzene solution in hexane?
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Chemistry Lab Analytical Lab

12/21/15

why should AgCl be washed with dilute HNO3 in gravimetric analysis
why should AgCl be washed with dilute HNO3 in gravimetric analysis          
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Chemistry Lab Science Chemistry

12/20/15

Explain why a 5.0 gram sample of water does not have the same number of particles as 5.0 grams of sugar?
thank you!
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Chemistry Lab Science Chemistry Moles

12/20/15

how many grams of sugar would you need to have the same number of particles as 5.0 grams of salt?
I'm having a hard time with my chemistry lab, please help!
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Chemistry Lab

12/17/15

what candy requires more base per gram of candy, sweet tarts or smarties? Explain why Which candy requires more acid per gram of candy? Explain why
what candy requires more base per gram of candy, sweet tarts or smarties? Explain why Which candy requires more acid per gram of candy? Explain why
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Chemistry Lab

12/14/15

Pre-laboratory excercises
The thermol decompostion of calcium carbonate produces two by-products, calcium oxide (also known as quicklime) and carbon dioxide. Calculate the volume of carbon dioxide produced at STP from the... more
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Chemistry Lab

12/05/15

Basic Solution Dilution
You need 520. mL of a 15 % (m/v) glucose solution. If you have a 25% (m/v) glucose solution on hand, how many milliliters do you need?
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11/28/15

Reasons which explain why the efficiency of a reaction increases as the average rate decreases?
Reasons which explain why the efficiency of a reaction increases as the average rate decreases? in other words, why does a slow chemical reaction is more effective than quick ones? I done an... more
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Chemistry Lab

11/11/15

24.8 mL of an ideal gas are collected at a temperature of 21.3 C and 749.0 mm Hg. Calculate the volume this gas would occupy at STP (VSTP)for this gas sample.
This is part of a chemistry lab and I cannot figure out how to do this problem.
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Chemistry Lab

11/07/15

explain why the addition of S2- ion to Cr(OH)3(s) does not result in the formation of Cr2S3(s)
 The addition of S2- ion in to Fe(OH)2(s) results in the formation of FeS(s) 
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Chemistry Lab Chemistry

11/05/15

When using crotonic acid(weak acid) and NaOH titration, what is the net ionic equation when you add them both together?
we need the net ionic equations and the ionic equations but I am unsure because I know it does not dissociate completely.
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Chemistry Lab

10/21/15

why does our Cucl2 solution become cloudy when NaNO3 is added to it
we added 1.5 g of Nano3 to 4 ml of a 0.5M Cucl2 solution. why did it turn cloudy. does it have something to do with the common ion effect
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10/20/15

Is citric acid plus baking soda an endothermic reaction?
Please explain if it is endothermic or exothermic?
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Chemistry Lab Chemistry Chem

10/12/15

How to write the balanced equation?
If 3.30g of Cu(NO3)2 is obtained from allowing 1.86g of Cu to react with excess HNO3, what is the percent yield of the reaction? Write the balanced equation.
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