Chemistry » Page 99

Chemistry

Alfredo Mejia

A 50 gram sample of a radioisotope undergoes 2 half-lives. How many grams

would remain at the end? Explain.

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Chemistry

Dork

What does the reaction rate say about a reaction?

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Chemistry

Kellen Oconnell

Is it possible to change the strength of an acid? Explain how you would do this.

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Chemistry

Trevor

What type of ion does neutral produces

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Chemistry

Dodger

What statement defines enzymatic activity

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Chemistry

Bauer

Volcano formation is directly related to plate tectonics.

True

False

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Chemistry

Brenda Ball

The solubility of nitrogen gas at 25 degrees C and 1 atm is 6.8 x 10^ (-4) mol/L. If the partial pressure of nitrogen gas in air is 0.76 atm, what is the concentration (molarity) of dissolved nitrogen?

5.2 x 10^ (-4) M

1.1 x 10^ (-5) M

4.9 x 10^ (-4) M

3.8 x 10^ (-4) M

6.8 x 10^ (-4) M

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Chemistry

Raelynn Callahan

Units of work would be equivalent to a Newton times a meter.

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Chemistry

Adyson Robinson

Which of the following terms would you use to describe the motion of Earth in its orbit around the Sun?

a. rotation

b. ellipse

c. solstice

d. revolution

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Chemistry

Ryann Leonard

Which one of the following compounds is an example of a covalent molecule?

a) NaCl b) H2O c) KOH d) Al (NO3) 3

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Chemistry

Quentin

What must happen for heat to be transferred by convection

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Chemistry

Rylee Glover

A compound contains 75% carbon and 25% hydrogen by mass. what is the empirical formula for this compound?

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Chemistry

Ezra Lang

How do hydroxyl ions and hydronium ions affect pH?

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Chemistry

Heidi Anderson

What happens when non-metal atoms ionize?

a.

They lose electrons

c.

They gain electrons

b.

They lose 2 electrons

d.

They do not form ions

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Chemistry

Dexter Moreno

An isotope contains 26 protons, 24 electrons, and 32 neutrons

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