Chemistry » Page 22

Chemistry

Kirsten

Which statements describe abiotic factors in an environment?

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Chemistry

Emily Camacho

A ball rolling across the ground in Death Valley will slow and eventually stop. Why?

- the ball's kinetic energy evaporates.

- the ball's force is destroyed.

- the friction of the ball changed the force to negative ions.

- the ball's kinetic energy changed to heat through frictions.

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Chemistry

Shaw

Calculate ∆h0 for the following reaction. br2 (

g. → br2 (l) ∆hf0 br2 (

g. = 30.91 kj/mol; ∆hf0 br2 (l) = 0 kj/mol)

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Chemistry

Dorian Howard

Ethyl alcohol has a latent heat of vaporization of 850 J/g. Water has a latent heat of vaporization of 2260 J/g. Container A contains 1.0 kg of ethyl alcohol. Container B contains 1.0 kg of water. Both liquids are brought to a boil. If the same amount of heat is continuously added to each container, which liquid will boil away first?

water

ethyl alcohol

both will boil away at the same time

boiling and condensation will happen at the same rate so neither liquid will boil away

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Chemistry

Guest

The greatest composition by mass in an atom 17/8 O is due to the total mass of its

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Chemistry

Bart

1. What is the criteria' for designating an object an asteroid?

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Chemistry

Colt Gay

Extend

E1 Explain why the arrangement,

movement and energy of

particles change during

changes of state.

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Chemistry

Guest

What is in a banana? give me specifics?!

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Chemistry

Tamia Estrada

Addition of an excess of lead (II) nitrate to a 50.0mL solution of magnesium chloride caused a formation of 7.35g of lead (II) chloride precipitate. What was the molar concentration of chloride ions in the solution (in mol/L) ?

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Chemistry

Harmony Harper

2.70 L of a gas has a pressure of 0.63 atm. What is the volume of the gas at 105 kPa?

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Chemistry

Adalynn Mason

Which statements describe Rutherford's model of the atom? Select all that apply.

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Chemistry

Cherish Cole

When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. what volume of h2 is produced when 7.20 g of al reacts at stp?

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Chemistry

Edith Cooley

Which is most likely the result of millions of metal atoms crowding together so that molecular orbitals become combined?

the loss of metallic properties

the formation of bands in a crystal

the loss of valence electrons to other atoms

the formation of localized valence electrons

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Chemistry

Gina Martinez

How is the Kyoto Protocol enforced

A. By using carbon credits and debits

B. By banning aerosols

C. By banning CFCs

D. By monitoring the ozone hole

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Chemistry

Delilah Gilmore

What are all the elements to the left of the zigzag line in a periodic table called?

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