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Chemistry

Cochran

Charcoal appears black in color because it

A) emits black-colored light.

B) has a black-colored pigment.

C) absorbs all wavelengths of light that fall on it.

D) reflects all wavelengths of light that fall on it.

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Chemistry

Abraham Kent

Determine the identity of the element that contains exactly three 4p electrons in the ground state

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Chemistry

Brooke Murillo

A substance that decreases hand increases ph when it dissociates in water is called

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Chemistry

Jayleen Gregory

Why did scientists pre-Lavoisier believe that matter was destroyed in the burning fire experiment?

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Chemistry

Sebastian Glover

Describe the motions of particles in the 3 common states of matter

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Chemistry

Emery Poole

What is the percent yield of a reaction in which 200. g of phosphorus trichloride reacts with excess water to form 91.0 g of hcl and aqueous phosphorous acid (h3po3) ?

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Chemistry

Jermaine Gaines

Sodium-25 was to be used in an experiment but it took 3.0 minutes to get the sodium from the reactor to the laboratory if 5.0 mg of sodium-25 was removed from the reactor how many mg of sodium-25 were placed in the reaction vessel 3.0 minutes later if the half-life of sodium-25 is 60 seconds

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Chemistry

Cael Lawrence

Atomic number equals the number of

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Chemistry

Cayden Cervantes

In the reaction C + O2 → CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be needed in the reaction? 18 g 54 g 72 g 90 g

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Chemistry

Weirdo

In the following combustion reaction, what is the mole ratio of diatomic oxygen to water?2 c2h6 7 o2 (

g. - - > 4 co2 6 h2o

a. 6/7

b. 7/4

c. 7/6

d. 6/7

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Chemistry

Bunny Rabbit

1. A cube has a mass of 40 grams. One side of the cube has a length of 3.4. What is the Density of the cube?

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Chemistry

Annabella Lawrence

Which of the following is the trend down a period?

A. The number of complete electron shells increases by one.

B. The number of complete electron shells stays the same.

C. The number of outer shell electrons decreases by one.

D. None of these.

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Chemistry

Morse

How does sugar affect the rate of cellular respiration in yeast?

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Chemistry

Guest

Why does bread turn brown when it toasts?

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Chemistry

Guest

What is the term used to describe the material moved by erosion?

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