Chemistry » Page 108

Chemistry

Goblin

Which of the following sample will have the greatest average speed at 355 K?. A. CH4. B. Ne. C. C2H4. D. Cl2

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Chemistry

Taylor Valencia

What substance is 52.4 % potassium and 47.6 % chlorine?

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Chemistry

Lexus

The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H + ions; that is, ΔH° [H f ⁺ (aq) ] = 0. (a) For the following reaction HCl (g) ⟶H₂O H⁺ (aq) + Cl⁻ (aq) ΔH° = - 74.9 kJ/mol calculate ΔH° for the Cl f ⁻ ions. (b) Given that ΔH° for OH f - ions is - 229.6 kJ/mol, calculate the enthalpy of neutralization when 1 mole of a strong monoprotic acid (such as HCl) is titrated by 1 mole of a strong base (such as KOH) at 25°C.

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Chemistry

Larsen

Heat is the total potential energy of a substance that can be transferred. TRUE FALSE

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Chemistry

Nichols

How does Earth's rotation axis cause seasons to change?

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Chemistry

Joslyn Guzman

Which of the following can be considered evidence of a chemical change? (Click the 4 that apply)

A. Evaportation

B. Production of a new substance

C. Production of Bubbles

D. Melting

E. Color change

F. Dissolving

G. Freezing

H. Heat is released

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Chemistry

Shelby Mosley

The decomposition of hi has a rate constant of 1.80 * 10-3 m-1s-1. how much hi remains after 8.50 min if the initial concentration of hi is 4.78 m?

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Chemistry

Aylin Benjamin

Explain negative and positive acceleration?

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Chemistry

Zion Haley

Compare and contrast plains and plateaus

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Chemistry

Corey Hines

If there are 2g of C6H12O6, what is the volume of the kool-aid

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Chemistry

Cassandra Galvan

What mass is 2.4E25 molecules of NaHCO3?

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Chemistry

Haney

Why does pumping more air into a basketball increase the pressure inside the ball?

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Chemistry

Kinsley Olsen

For each of these equations, determine the change in the number of moles of gas, δngas.?

A.) (NH4) 2 CO3 (s) = 2NH3 (g) + CO2 (g) + H2O (g)

B.) H2 (g) + Cl2 (g) = 2HCl (g)

C.) 2H2 (g) + O2 (g) = 2H2O (l)

D.) 2Na (s) + Cl2 (g) = 2NaCl (s)

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Chemistry

Steve Mckenzie

How does the moon move?

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Chemistry

String Bean

Which noble gas has the same electron configuration as the oxygen in a water molecule?

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