Chemistry » Page 54

Benjamin Melendez

Chemistry

Which statement explains the cleaning action of soap on greasy dishes? Which statement explains the cleaning action of soap on greasy dishes? The soap hydrates the grease with its polar head groups and holds it in suspension. The soap chemically breaks down the grease into smaller, more water-soluble molecules. The soap changes the water-solubility of the grease so that it is easily dissolved by the water. The grease is trapped inside the hydrophobic interior of micelles made of soap molecules.

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Chemistry

No. Of particles in H2SO4 in which 8grams oxygen is present?

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Chemistry

Michael mixes two chemicals together in a beaker. The chemicals change color, and the beaker heats up quickly. What kind of change most likely occurred?

A chemical change occurred.

Only a physical change occurred.

A mixture formed.

No change occurred.

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Chemistry

What is the Molar mass of Na3P

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Chemistry

For each of the following sets of elements, circle the element expected to be most electronegative and draw a box which is expected to be least electronegative. K, Sc, Ca

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Chemistry

Dissolving brass requires an oxidizing acid such as concentrated nitric acid. Nitrogen dioxide is produced as a byproduct in this reaction. Write a balanced chemical equation for the reaction of copper metal with concentrated nitric acid to pro duce copper (il) nitrate, nitrogen dioxide, and water.

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Chemistry

If 5.1 l of antifreeze solution (specific gravity = 0.80) is added to 3.8 l of water to make a 8.9 l mixture, what is the specific gravity of the mixture?

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Chemistry

You have 1 L of soda your class can hold 400 ML of soda how many glass of the soda can you get out of one L

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Chemistry

Condensation requires? a) the removal of energy b) the absorption of energy. c) no energy change.

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Chemistry

What is the species that determines the ph of a solution?

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Chemistry

Echoderms contain a what similar to the kind that vertebrates have

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Chemistry

Study the following unbalanced redox reaction. Which one of the following choices represents the balanced redox equation?

PbS + O2→ PbO + SO2

PbS + 2O2→ PbO + 2SO2

2PbS + 2O2→ 2PbO + 2SO2

2PbS + 3O2→ 2PbO + 2SO2

3PbS + 3O2→ 2PbO + 2SO2

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Chemistry

Arrange these gases in order of decreasing standard molar entropy:

Rank from largest to smallest. Kr, Cl2, SO3

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Chemistry

A car traveled at a constant velocity of 70 mph from noon to 2:00 pm. At 3:00 pm the velocity of the car was 80 mph; and finally at 4:30 pm the velocity of the car was 40 mph.

Which statement accurately describes the acceleration of the car?

A) The car had a positive acceleration the entire time.

B) The car had a negative acceleration from noon to 2:00 pm.

C) The acceleration of the car from 3:00 pm to 4:30 pm was zero

D) The car had a positive acceleration between 2:00 pm and 3:00 pm.

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Chemistry

How do you number cycloalkanes?

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