Chemistry » Page 40

Chemistry

Friendo

The name given to the change of state from gas to liquid is

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Chemistry

Rashad Hawkins

How many molecules of carbon dioxide, CO2, are present in 388.1 grams?

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Chemistry

Abbie

Radioactive elements will continue to decay until

A. They have a stable nucleus

B. They have a full octet of electrons

C. They have a neutral electrical charge

D. They have the same number of electron and protons

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Chemistry

Barrett Skinner

Which one of the following elements is stable?

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Chemistry

Lennon

Which statement best describes waves? A. Waves can only travel in empty space B. Waves cannot propagate without medium C. Waves can carry energy through matter and space

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Chemistry

Jesus Odom

In some plants, the product of fertilization. This holds an embryonic plant, usually a food source for the embryo, and is enclosed in a protective coat.

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Chemistry

Johan Bonilla

An unknown compound is discovered in a raid on a terrorist organization; it is believed that the compound is Sarin. When a 10.0-gram sample of this compoun is completely combusted, 15.6 g CO2 and 6.4 g H20 are produced, along with other combustion products. Using numerical calculations, prove that this unknown compound can not be Sarin.

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Chemistry

Kian

Calculate the molarity of a solution prepared by dissolving 12.5 g of Na2CrO4 in enough water to produce a solution with a volume of 810. mL.

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Chemistry

Leah

How many phases of matter are present in whipped cream?

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Chemistry

Jimmy Travis

How does an increase in temperature at which a reaction takes place cause an increase in reaction rate

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Chemistry

Donte

What is meant by first ionization energy?

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Chemistry

Kelton Christensen

Identify which compound is an alkane: ch2o, c6h14, or c3h4. Explain your reasoning.

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Chemistry

Arjun Zamora

Determine the total time that must elapse until only ¼ of an original sample of the radioisotope Rn-222 remains unchanged.

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Chemistry

Jesus Compton

57

The amount of oxygen in the reactants is 4 atoms. In the products, the oxygen is distributed to water (H20) and Oz gas.

Which coefficients would be placed in front of water and oxygen?

O

2 in front of water and 2 in front of oxygen

1 in front of water and 2 in front of oxygen

1 in front of water and 1 in front of oxygen

2 in front of water and 1 in front of oxygen

O

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Chemistry

Luka Wallace

Which of the substances will float in water? A) A cube with a density of 10 g/ml. B) A block with a density of 0.01 g/ml Eliminate C) A sphere with a density of 2.0 g/ml D) A cylinder with a density of 6 g/ml.

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