2,220 Answered Questions for the topic organic chemistry

Organic Chemistry Chemistry Biochemistry Ap Chemistry

09/21/20

When 1 g of a salt is dissolved in 50.0 g of water, the temperature increases by 2.5ºC. Which of the following changes will cause the temperature to increase by about 5ºC?
When 1 g of a salt is dissolved in 50.0 g of water, the temperature increases by 2.5ºC. Which of the following changes will cause the temperature to increase by about 5ºC?a. Doubling the amount of... more
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Organic Chemistry Math Chemistry Biochemistry

09/21/20

need help with a homework problem, very advanced
Guanine is an essential component of DNA. It contains the elements carbon, hydrogen,nitrogen and oxygen. When 615 mg of guanine is burned, 895 mg of carbon dioxide and 183 mgof water are formed. In... more
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Organic Chemistry Science Chemistry Biochemistry

09/21/20

why do you assume 100 g of a substance when given percentages?
when given a problem and the elements of a compound are given in percentages, i don't understand why you can just assume that it's 100g of the compound. why couldn't it be 200g or 700g of the... more
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Organic Chemistry Chemistry Biochemistry Ap Chemistry

09/20/20

When 22.2 g of ammonium nitrate is dissolved in 200 g of water, the temperature decreases from 20ºC to 12.5ºC.
When 22.2 g of ammonium nitrate is dissolved in 200 g of water, the temperature decreases from 20ºC to 12.5ºC.What is the enthalpy of solution of ammonium nitrate? Given, specific heat of solution... more
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Organic Chemistry Chemistry Biochemistry Ap Chemistry

09/20/20

Given the following salts and the corresponding enthalpy, predict whether the temperature will decrease or increase when the salt dissolves in water.
Given the following salts and the corresponding enthalpy, predict whether the temperature will decrease or increase when the salt dissolves in water.Ammonium Chloride (ΔHsol = +14.7 kJ/mol)
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Organic Chemistry Chemistry Biochemistry Ap Chemistry

09/20/20

Calculate the amount of salt in a commercial cold-pack containing ammonium nitrate (ΔHsol = + 25.7 kJ/mol) if the final temperature of the cold-pack is 0ºC.
Calculate the amount of salt in a commercial cold-pack containing ammonium nitrate (ΔHsol = + 25.7 kJ/mol) if the final temperature of the cold-pack is 0ºC. Assume that the initial temperature of... more
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Organic Chemistry Chemistry Biochemistry Ap Chemistry

09/20/20

When 1 g of a salt is dissolved in 50.0 g of water, the temperature increases by 2.5ºC. Which of the following changes will cause the temperature to increase by about 5ºC?
When 1 g of a salt is dissolved in 50.0 g of water, the temperature increases by 2.5ºC. Which of the following changes will cause the temperature to increase by about 5ºC?a. Doubling the amount of... more
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Expert Answers •1
Organic Chemistry Chemistry Biochemistry Ap Chemistry

09/20/20

When 22.2 g of ammonium nitrate is dissolved in 200 g of water, the temperature decreases from 20ºC to 12.5ºC.

When 22.2 g of ammonium nitrate is dissolved in 200 g of water, the temperature decreases from 20ºC to 12.5ºC. What is the enthalpy of solution of ammonium nitrate? Given, specific heat of solution... more
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Organic Chemistry Chemistry Biochemistry

09/20/20

What is the amount of ammonia (17.03 g/mol) that can be obtained by complete reaction of 35 g of nitrogen gas (28.01 g/mol) with excess hydrogen gas
What is the amount of ammonia (17.03 g/mol) that can be obtained by complete reaction of 35 g of nitrogen gas (28.01 g/mol) with excess hydrogen gasaccording to the balanced equation:N2 + 3H2 = 2NH3
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Organic Chemistry Chemistry Biochemistry Ap Chemistry

09/20/20

What is the concentration expressed in ppm of a solution containing 0.036 g of sodium chloride (58.44g/mol) in 0.500 Liters of solution ? Assume the density of the solution to be 1.00g/mL.
What is the concentration expressed in ppm of a solution containing 0.036 g of sodium chloride (58.44g/mol) in 0.500 Liters of solution ? Assume the density of the solution to be 1.00g/mL.
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Organic Chemistry Chemistry Biochemistry Ap Chemistry

09/20/20

What volume of a 0.500 M solution of sucrose (342.3 g/mol) contains 22.4 g of sucrose?
What volume of a 0.500 M solution of sucrose (342.3 g/mol) contains 22.4 g of sucrose?
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Organic Chemistry Chemistry Biochemistry Ap Chemistry

09/20/20

What is the molarity (M)of a sodium chloride solution prepared by dissolving 20.0 g of sodium chloride (58.44g/mol) in water to give 45 mL of solution?
What is the molarity (M)of a sodium chloride solution prepared by dissolving 20.0 g of sodium chloride (58.44g/mol) in water to give 45 mL of solution?
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Organic Chemistry Chemistry Physical Science Molarity

09/19/20

Molecular calculation / empirical formular
Aspirin has the chemical formula C9H8O4. 1) How many grams of O are present in 1.25 moles of Aspirin?1.25 = 15.999/1 = 19.999 = 20 gO2) How many atoms of H are present in 1.25 moles of Aspirin?... more
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09/18/20

how to solve as the scientific notation
How many moles of hydroxide are in a 255 uL sample of 0.0350 M chromium (III) hydroxide solution? Answer in scientific notation
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09/18/20

what is the molecular formula?
Lactic acid, also known as milk acid, is a chemical compound that plays a role in several biochemical processes. It has a molecular formula mass of 90.0 amu and a percent composition by mass of... more
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09/18/20

What is the empirical formula?
A laboratory analysis of vanillin, the flavoring agent in vanilla, determined the following mass percent composition: 63.15 % carbon, 5.30 % hydrogen and 31.55 % oxygen. What is the empirical... more
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Organic Chemistry Chemistry Physical Science Density

09/18/20

About the dimensions of a cube
Gold Cube size islength: 25.36mmwidth: 25.66mmheight: 25.41mmmass of the gold cube is 145.4757gHow to calculate volume of the cube (cm^3)?and What is the density of the cube (g/cm^3)?
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Organic Chemistry Chemistry Physical Science Volume

09/18/20

How to solve the volume and density?
Dimensions of cylinder.length: 76.25mmdiameter: 12.76mmMass of cylinder: 74.9650gHow to calculate the volume of the solid cylinder (cm^3) ?and density (g/cm^3)?
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Organic Chemistry Chemistry Physical Science

09/18/20

How to solve the this chemistry question
You have a copper cylinder at room temperature (30ºC). You find that the diameter of the copper cylinder is 4.52 cm and the mass of the cylinder is 95.6754 g. What is the length (h) of the copper... more
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Organic Chemistry Math Science Calculus

09/18/20

Write the prefix and unit that is represented by each of the following sets of symbols
1.Write the prefix and unit that is represented by each of the following sets of symbols -mm-pL-dL-µs-km-m-ng2.Write the symbols that represent each combination of prefix and... more
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Organic Chemistry Math Science Chemistry

09/18/20

Write which prefix is associated with the following place values:
Write which prefix is associated with the following place values:-The hundreds place-The millions place-The tenths place-The hundredths place-The billionths place-The billions place-The thousandths... more
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Organic Chemistry Science Chemistry Biochemistry

09/18/20

Write the symbols that represent each prefix.
Write the symbols that represent each prefix.-Deca-Pico-Hecto-Milli-Kilo-Mega-Micro-Centi
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Organic Chemistry Chemistry Biochemistry

09/17/20

Calculate the mass of ammonia NH3 that contains a million 1.0 x 10^6 hydrogen atoms.
Calculate the mass of ammonia NH3 that contains a million 1.0 x 10^6 hydrogen atoms.Be sure your answer has a unit symbol if necessary, and round it to 2 significant digits.
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Organic Chemistry Chemistry Biochemistry

09/17/20

Calculate the mass of glucose C6H12O6 that contains a trillion 1.000 x 10^12 carbon atoms.
Calculate the mass of glucose C6H12O6 that contains a trillion 1.000 x 10^12 carbon atoms.Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits.
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Organic Chemistry Chemistry Biochemistry

09/17/20

Calculate the number of hydrogen atoms in a 100.0 g sample of tetraborane (B4H10)
Calculate the number of hydrogen atoms in a 100.0 g sample of tetraborane (B4H10).Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits.
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