Chemistry » Page 89

Chemistry

Elizabeth Wise

How is the energy level of an atom's valence electrons related to the period in the periodic table?

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Chemistry

Elsa Glover

In the presence of a platinum catalyst, ammonia, NH3, burns in oxygen, O2, to give nitric oxide, NO, and water vapor. How many volumes of nitric oxide are obtained from one volume of ammonia, assuming each gas is at the same temperature and pressure?

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Chemistry

Guest

How can you distinguish

between living organisms

and nonliving materials

in a water sample?

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Chemistry

Jerome Anthony

The solubility of a gas in water is 0.22 g/L at 20.0 kPa of pressure. What is the solubility when the pressure is increased to 115 kPa?

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Chemistry

Alvin Garcia

What is the oxidation number for as in as2o3?

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Chemistry

Kayden Hale

In the reaction of calcium with chlorine which atom is the oxidizing agent

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Chemistry

Villegas

Hydrogen gas is explosive within the given range of 4% - 75% v/v. Assuming that each student in your class produces 6L of H2 and that the lab is not ventilated, is there a danger of an explosion?

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Chemistry

Grayson Yu

Which list of elements contains only metals?

A. carbon, iodine, tin

B. tin, copper, carbon

C. cesium, iron, copper

D. iodine, carbon, argon

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Chemistry

Guest

In a scientific investigation what is the name for a prediction that can be tested

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Chemistry

Raegan Briggs

What is the formula of the hydride formed by magnesium?

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Chemistry

Vernon

Why are gasses elements on the periodic table?

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Chemistry

Lauren Burch

The gravitational force between two objects is 100 N

If the mass of each object is doubled, what is the

gravitational force between the objects at the same

distance?

a:25 N

b:50 N

c:200 N

d:0400 N

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Chemistry

Guest

Acid charge Perchloric acid ion

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Chemistry

Shayna Everett

Write the concentration equilibrium constant expression for this reaction. 2cui (s) + i2 (aq) → 2cu+2 (aq) + 4i - (aq)

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Chemistry

Abel Deleon

Chlorine gas has a pressure of 1.05 atm at 25°C. What pressure will it exert at 75°C?

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