304 Answered Questions for the topic Chemistry Lab

Chemistry Lab

09/18/18

Hexane has a density of 0.66 g/mL and is also insoluble in water. Would hexane float on water or sink beneath water when mixed with water?
pre lab questionjs
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Chemistry Lab

09/18/18

The desity of water is 1.00 g/mL. Carbon tetrachloride is insoluable in water. Would carbon tetrachloride float on water or sink beneth water when they are comb
pre lab question
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Chemistry Lab

09/17/18

How to test the conductivity of liquid and solid substances?
How to test the conductivity of liquid and solid substances?
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Chemistry Lab

09/17/18

How to classify the resulting product?
When an ice cube melts, the product will be a glass of liquid water. If you were to dissolve sugar in the water, how would you classify the resulting product? BE SPECIFIC!
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Chemistry Lab

09/17/18

3 physical properties of Diet Coke
3 physical properties of Diet Coke
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Chemistry Lab

09/17/18

3 physical properties of an ice cube?
3 physical properties of an ice cube?
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Chemistry Lab

09/17/18

How to test the conductivity of liquid substances?
How to test the conductivity of liquid substances?
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Chemistry Lab

09/17/18

Is salt a compound, element, mechanical mixture, suspension mixture or solution mixture?
Is salt a compound, element, mechanical mixture, suspension mixture or solution mixture?
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Chemistry Lab

09/13/18

10 mL of 0.2 M NiSO4 is mixed with 20 mL of 0.1 M CuSO4. Calculate the molarity of Ni2+, Cu2+and SO42- ions present in solution.
10 mL of 0.2 M NiSO4 is mixed with 20 mL of 0.1 M CuSO4. Calculate the molarity of Ni2+, Cu2+and SO42- ions present in solution.
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Chemistry Lab

09/13/18

Calculate the molarity of a solution obtained by adding 10 mL of 0.1 M NiSO4 to 10 mL of solvent.
Calculate the molarity of a solution obtained by adding 10 mL of 0.1 M NiSO4 to 10 mL of solvent.
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Chemistry Lab

09/13/18

How many moles of NiSO4 are present in 10 mL of 0.1 M NiSO4?
How many moles of NiSO4 are present in 10 mL of 0.1 M NiSO4?
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09/08/18

Hydrchloric acids
When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced.  CaCO3 + 2HCl = CaCl2 (aq) + H2O + CO2 A.)How many grams of calcium chloride will be... more
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09/07/18

Unknown compound combustion
An unknown compound contains only C, H, and O. Combustion of 6.10 g of this compound produced 14.4 g of CO₂ and 3.92 g of H₂O. What is the empirical formula of the unknown compound?
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09/07/18

Combustion Chemistry
Complete combustion of 5.90g of a hydrocarbon produced 18.1g of CO2 and 8.63g of H2O. What is the empirical formula for the hydrocarbon?
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Chemistry Lab

09/05/18

CHemistry lab
A beam of light is reduced to one-fourth of its initial intensity on passing through a 10 cm thick cell containing a 0.05 M (molar = moles per liter) solution. Calculate the extinction coefficient... more
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Chemistry Lab

09/05/18

Chemistry lab
A 0.001 M solution absorbs 10% of light passed through a cell 1 cm thick. What concentration must be used to absorb 90% of the same radiation? Answer:
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Chemistry Lab

09/05/18

Chemistry lab
An aqueous solution absorbs 10% of incident light passed through it. Calculate the absorbance if the same solution is placed in a cell 5 times as thick?
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Chemistry Lab

09/05/18

Chemistry lab
The molar extinction coefficient of a complex of iron is 12,000 L mol-1 cm-1 with minimum detectable absorbance 0.01. What is the minimum concentration needed for minimum detection in a cell of... more
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Chemistry Lab

09/03/18

If a student reacts 4.40 mL of acetic acid with 3.35 mL of isopentyl alcohol and obtains 3.25 mL of isopentyl acetate as the product, what was the percent yield
Isopentyl acetate can be prepared by an esterification reaction using acetic acid and isopentyl alcohol. The balanced reaction is shown below. (Acetic acid has MW of 60.0 g/mol & density of... more
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Chemistry Lab

09/03/18

A student prepares benzoic acid by hydrolyzing 6.47 g of methyl benzoate (FW 136.15 g/mol) using excess sodium hydroxide. If the student recovers 3.71 g of benz
Ig the student recovers 3.71 g of benzoic acid (FW 122.12 g/mol), what was the percent yield of the reaction?
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Chemistry Lab

09/03/18

Calculate the theoretical yield (in grams of acetic acid, FW 60.05 g/mol) if 8.79 mL of acetic anhydride (FW 102.09 g/mol, density 1.08 g/mL) is used.
When acetic anhydride is dissolved in water, it forms acetic acid according to the balanced chemical reaction shown below. Calculate the theoretical yield (in grams of acetic acid, FW 60.05 g/mol)... more
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Chemistry Lab

09/03/18

An aqueous solution is 3.0M hydrochloric acid and has a density of 1.1 g/mL. How many mmol of hydrochloric acid are present in 25 mL of this solution
 Chem
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Chemistry Lab Chemistry Enthalpy

08/26/18

What are the answers to these Enthalpy questions? I need to check my them homework please
1.H2O(l) H2O(g)2.2 SO2 (g) + O2 (g) 2 SO3 (g)3.SO3 (g) + H2O(l) H2SO4 (l)4.2 HI(g) H2 (g) + I2 (s)5.4 NH3 (g) + 5 O2 (g) 4 NO(g) + 6 H2O(l)6.CH4 (g) + 2 O2 (g) CO2 (g) + 2 H2O(g)7.CH4 (g) + 2 O2... more
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Chemistry Lab

08/22/18

Does mixing chemicals always lead to a chemical reaction
I need help for the writing part of my chemistry lab.
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Chemistry Lab

08/14/18

a sheet of copper had a volume of 0.947mL. Use the density of copper (8.95g/mL) as a unit of conversion to calculate the mass of the copper.
 about the conversions between volume and mass 
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