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Chemistry

Guest

Convert the concentration of SO2 from 80 μg/m3 to units of parts per million. The gas has a temperature of 25˚C and a pressure of 101.325 kPa. (Problem 2-56)

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Chemistry

Nicholas Knox

Calculate the enthalpy change for the reaction Ca (s) + N2 (g) + 3O2 (g) ⟶Ca (NO3) 2 (s) from the following equations: 8Ca (s) + Ca (NO3) 2 (s) →Ca3N2 (s) + 6CaO (s) ΔH = - 3304 kJ Ca3N2 (s) ⟶3Ca (s) + N2 (g) ΔH = + 432 kJ 2CaO (s) ⟶2Ca (s) + O2 (g) ΔH = + 1270 kJ

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Chemistry

Landon Beard

Predict the relative strengths of the carbon-halogen bonds in CH3FCH3F, CH3ClCH3Cl, and CH3BrCH3Br. Rank from strongest to weakest. To rank items as equivalent, overlap them.

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Chemistry

Danica Vance

Area of science that studies tiny partials like atoms

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Chemistry

Katelyn Rivas

According to the law of conservation of mass, mass is neither created nor destroyed in any ordinary chemical reaction. Which of the following is a demonstration of this law? Group of answer choices a. When iron reacts with oxygen to form rust, the mass of the iron atoms increases. b. When carbon dioxide breaks down into carbon and oxygen, the number of atoms always remains the same. c. When sodium and chlorine combine to make salt, some of the sodium is always lost. d. When hydrogen and oxygen combine to make water, oxygen atoms are converted to hydrogen atoms.

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Chemistry

Shaniya

Chose the two factors that work together to create the global wind patterns that operate in the atmosphere.

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Chemistry

Gerald

Which of the following would be expected to form ionic solutions in water?

CO2

C

NaI

CCl4

O2

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Chemistry

Haylie Colon

What would probably happen if you poured a liquid onto a solid table

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Chemistry

Gisselle Haas

If methyl orange is added to a substance and it turns the substance red, what does this tell you about the pH of the substance? Would this substance be an acid or a base?

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Chemistry

Maci

Why a preservative not added when preparing non aqueous drug solution?

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Chemistry

Chris Bradford

What is earths surface made of?

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Chemistry

Diya Daniel

What is the velocity of a wave with a wavelength of 0.03 m and a frequency of

120 Hz?

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Chemistry

Guest

Momentum is a measure of the mass motion force or weight of an object

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Chemistry

Tanya Barker

Which property is constant in the combined gas law?

pressure

temperature

volume

number of particles

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Chemistry

Mara Kline

Sodium forms an ion with a charge of_

a. 1+

b. 1-

c. 2+

d. 0

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