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Chemistry Lab

09/18/18

A student determined that an unknown liquid was soluable in an equal volume of water, had a density of approximately 0.80 g/mL and a boiling temperature of 55.5

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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?

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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?

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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

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Chemistry Lab

09/17/18

3 physical properties of an ice cube?

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Chemistry Lab

09/17/18

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?

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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.

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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.

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Chemistry Lab

09/13/18

How many moles of NiSO4 are present in 10 mL of 0.1 M NiSO4?

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Chemistry Lab Chemistry Ap Chemistry Chemistry,ap Chemistry

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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Chemistry Lab Science Chemistry Ap Chemistry

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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Chemistry Lab Chemistry Chemistry Conversion

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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A student determined that an unknown liquid was soluable in an equal volume of water, had a density of approximately 0.80 g/mL and a boiling temperature of 55.5

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?

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

How to test the conductivity of liquid and solid substances?

How to classify the resulting product?

3 physical properties of Diet Coke

3 physical properties of an ice cube?

How to test the conductivity of liquid substances?

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

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.

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

How many moles of NiSO4 are present in 10 mL of 0.1 M NiSO4?

Hydrchloric acids

Unknown compound combustion

Combustion Chemistry

CHemistry lab

Chemistry lab

Chemistry lab

Chemistry lab

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

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

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.

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

What are the answers to these Enthalpy questions? I need to check my them homework please

Does mixing chemicals always lead to a chemical reaction

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