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Chemistry

Eve

A 8.50 g sample of KCl is dissolved in 66.0 mL of water. The resulting solution is then added to 72.0 mL of a 0.280 M CaCl2 (aq) solution. Assuming that the volumes are additive, calculate the concentrations of each ion present in the final solution.

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Chemistry

Kenzie Sanford

Which compound is an isomer C4H9OH

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Chemistry

Ryleigh Gamble

If 50 mL of 0.2 M NaC2H3O2 and 10 mL of 1.0 M HC2H3O2 are diluted to a final volume of 100 mL, what is the pH of the buffer solution?

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Chemistry

Jacoby Mayo

What earth sphere extends from earth's core to earth surface?

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Chemistry

Arely Lowery

In each case, decide if the change is a "chemical change" or a "physical change". a) A cup of household bleach changes the color of your favorite T-shirt from purple to pink. b) Water vapor in your exhaled breath condenses in the air on a cold day. c) Plants use carbon dioxide from the air to make sugar. d) Butter melts when placed in the Sun

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Chemistry

Maddison

Squeezing a balloon is one way to burst it why

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Chemistry

Alvin Garcia

What is the molar mass of acetylsalicylic acid (Aspirin) ? (HC₉H₇O₄)

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Chemistry

Smudge

If I have 4 moles of a gas at a pressure of 5.6 atm and a volume of 12 liters, what is the temperature? (2005 K)

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Chemistry

Carleigh Mendez

Suppose you place an ice cube into a cup of hot tea? What will happen to the temperature of the ice cube and the tea? A) The temperature of the ice will increase quickly, while the temperature of the tea will drop slowly. The liquids may or may not reach equilibrium. B) The temperature of the tea will drop quickly, while the temperature of the ice will increase slowly. The liquids may or may not reach equilibrium. C) The ice will melt and the temperature of the tea will drop quickly; then the change will slow until equilibrium is reached. D) The temperature of the ice will rise slowly at first and the temperature of the tea will drop slowly; then the temperature change quicken until equilibrium is reached.

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Chemistry

Guest

Combustion reactions use which element as a reactant?

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Chemistry

Eliana Fleming

Organisms that have the ability to use an atmospheric gas to produce an organic nutrients are known as?

1. herbivores

2. descomposers

3. carnivores

4. autotrophs

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Chemistry

Ariel

How many grams of CO2 are produced from 51 g of CH4

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Chemistry

Jaylah Bentley

The box is at rest on the table. what force is represented by A?

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Chemistry

Eileen Cantu

Under normal atmospheric conditions and at room temperature what is the physical state of CO2

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Chemistry

Lyric Barber

A lahar is a type of mudflow that occurs

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