Chemistry » Page 31

Chemistry

Hadassah

Earth's gravity pulls on both stationary objects and moving objects. true or false?

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Chemistry

Taylor Donaldson

What is a Benedict solution?

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Chemistry

Reilly Rhodes

True or false Infrared rays are electromagnet waves that are longer than radio waves but shorter than visible light rays.

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Chemistry

Ryker Yu

Oil became a major resource with the diffusion of motor vehicles early in the 1800s. Oil became a major resource with the diffusion of motor vehicles early in the 1800s. True False

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Chemistry

Natalie Pace

What is the kinetic energy of a 100-kg object that is moving with a speed of 12.5 m/s?

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Chemistry

Darrell Barrett

When are drops of indicator most likely added to the erlenmeyer flask?

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Chemistry

Sarahi Meyers

Assume that you dissolve some sugar in water. Explain how you could reverse this change.

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Chemistry

Cochran

An upward force acts on a proton as it moves with a speed of 2.0 * 105 meters/second through a magnetic field of 8.5 * 10-2 tesla running from east to west. What is the force and direction of the force on the proton?

2.7 * 10-15 N to the north

2.7 * 10-15 N to the south

1.7 * 10-14 N to the north

1.7 * 10-14 N to the south

1.7 * 10-14 N downward

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Chemistry

Marlon Dunn

The atomic mass of hydrogen-1 is 1.008 and the atomic mass of helium-4 is 4.003. Find the difference in grams between 4 moles of hydrogen and one mole of helium.

A) 4.81 x10-26 g

B) 0.029 g

C) 1.7 x 1022 g

D) 0 grams

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Chemistry

Jeremiah Wood

A piece if copper has a volume of 100.0cm3. If the mass of copper is 890 g, what is the density of copper?

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Chemistry

Macie Fitzpatrick

How many grams of naoh would react with 507 g fecl2 in the reaction fecl2 + 2naoh fe (oh) 2 (s) + 2nacl?

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Chemistry

Jaylynn Mccann

Which is an unreliable source?

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Chemistry

Keith Dunlap

Lilah runs 6m/s. how long will it take her to run 42 meters

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Chemistry

Braelyn Leblanc

A substance that forms a vapor is generally in what physical state at room temperature?

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Chemistry

Dania Burke

Standard pressure is 101.3 KPa, which is equal to 760. o mmHg. If gas has a pressure of 545 mmHg, what is its pressure in KPa to the proper number of significant figures?

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