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Chemistry

Nevaeh Gonzales

Which kelvin temperature is equivalent to 20°C

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Chemistry

Itsy

When a piece of magnesium metal is added to hydrochloric acid, what gas is produced?

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Chemistry

Edgar Chavez

A 10 pound block of lead-210 has a half-life of 22 years. What percentage of the block still contains lead-210 after 60 years?

1.5%

15%

77%

27%

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Chemistry

Hale

Combined gas law problem: a balloon is filled with 500.0 mL of helium at a temperature of 27 degrees Celsius and 755 mmHg. As the balloon rises in the atmosphere, the pressure and temperature drop. What volume will it have when it reaches an altitude where the temperature is - 33 degrees Celsius and the pressure is 0.65 atm?

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Chemistry

Siena Duke

1. What hypothesis could you propose about the relationship between the position of a type of atom in a molecule and the number of bonds that the atom forms? Explain your thinking.

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Chemistry

Guest

The molality of a solution is a measure of -

A - moles of solute per kilogram of solution

B - moles of solute per liter of solution

C - moles of solute per kilogram of solvent

D - moles of solute per liter of solvent

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Chemistry

Micah Patton

Which technology has allowed for exploration beyond our solar system?

A) space probe

B) space station

C) space shuttle

D) space observatory

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Chemistry

Alexus Poole

Which carbonate is most stable to heat?

A. Sodium carbonate

B. Copper (ii) carbonate

C. Zinc carbonate

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Chemistry

Laurel Mcclain

How many liters of 0.75 M solution can be made using. 336 moles of lead (II) oxide?

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Chemistry

Emmett Caldwell

Which molecule, when added to a solution, would give the solution the highest ph?

A. HCI

B. H2SO4

C. KOH

D. H2O

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Chemistry

Moses Estrada

All matter has mass and takes up space.

True

False

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Chemistry

Jaylen Winters

What problems must be overcome before fusion can be used to produce energy? A. synthesizing deuterium and tritium and containing the plasma reactants

B. achieving high temperatures and containing the plasma reactants

C. achieving high temperatures and synthesizing deuterium and tritium

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Chemistry

Alonso Kidd

A 50 W engine generates 50 J of energy. How long did it run for?

A. 10 s

B. 1 s

C. 5 s

D. 100 s

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Chemistry

Kaiden Craig

What is the mass (grams) of 9.89 * 10^24 moles of (cho30h) ?

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Chemistry

Matias Mcclure

Which of these elements is unlikely to have a reaction with any element or compound? rubidium (Rb) magnesium (Mg) cobalt (Co) argon (Ar)

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