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Chemistry

Guest

An atom of a particular element is traveling at 1.00% of the speed of light. The de Broglie wavelength is found to be 3.31 * 10-3 pm. Which element is this? Prove it.

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Chemistry

Meadow Page

Is a whale a abiotic or biotic

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Chemistry

Camilla Spencer

If the half-life of hydrogen-3 is 11.8 years, after two half-lives the radioactivity of a sample will be reduced to one-half of the original amount. If the half-life of hydrogen-3 is 11.8 years, after two half-lives the radioactivity of a sample will be reduced to one-half of the original amount. True False

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Chemistry

Glenn Barker

If element X has 25 protons, how many electrons does it have?

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Chemistry

Aron Porter

How much work is done to raise a 20N box 4m?

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Chemistry

Cassius Hurley

Which of the following lists the types of single substances? (Select only one answer)

Group of answer choices

elements and mixtures

suspensions, solutions, and colloids

elements, compounds, and mixtures

elements and compounds

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Chemistry

Taylor Stone

What is the average mass of a single silicon atom in grams?

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Chemistry

Jamal Stuart

Why is it wrong to assume that you are only "doing science" while you are doing experiments?

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Chemistry

Wong

An ice cube is placed on a kitchen counter. Which best describes heat flow in this situation

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Chemistry

Braydon

When water is placed in a thin glass tube, it tends to climb up the walls of the tube. This effect is known as capillary action. What causes this capillary action?

A. metallic bonding

B. covalent bonding

C. ionic bonding

D. hydrogen bonding

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Chemistry

Marilyn Vaughan

Earth rotates once every 24 hours. What does this mean?

A.

Earth makes one full trip around the Moon every 24 hours.

B.

Earth completes a full spin on its axis once every 24 hours.

C.

Earth makes one full trip around the Sun every 24 hours.

D.

Earth changes its orbit from clockwise to counterclockwise every 24 hours.

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Chemistry

Henry Fuller

Compare and contrast the outer core and the inner core.

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Chemistry

Liberty Hammond

What colors make the color turquoise?

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Chemistry

Ibarra

12.23 g of ammonia (NH3) are dissolved in enough water to make 560.0 mL of solution. How many moles of NH3 are added to the water?

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Chemistry

Guest

According to the ph scale, what is the approximate ph of acid rain?

a. 4.0

b. 4.5

c. 5.0

d. 5.5

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