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Chemistry

Leon Villanueva

What do dipole-dipole forces do?

A. Replace covalent bonds with hydrogen bonds

B. Turn nonpolar molecules into solids

C. Hold polar molecules together

D. Hold nonpolar molecules together

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Chemistry

Adison

As the moon revolves around earth, it also rotates on its axis. Why is it that the same side of the moon is always visible from earth

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Chemistry

Whitney Singleton

The SI unit for quantity of radioactive materials is:

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Chemistry

Angelique Buckley

If you choose to wear loose clothing, large or dangling jewelry, or contact lenses to lab, which of the following statements best represents how you should proceed?

A. All of these statements are reasonable compromises if you MUST wear these items to lab, but the best and safest practice is to leave them at home and dress for lab intentionally.

B. Make sure to wear your goggles securely over your contact lenses and check with your lab manual and TA to be sure you will not be working with any volatile or fume-producing reagents.

C. Make sure none of the jewelry will catch on your clothing or accidentally cut your gloves, and don't wear anything too valuable.

D. Make sure all loose clothing or jewelry can be confined by the lab coat

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Chemistry

Fernanda Wright

Which of these elements exists as a solid at room temp and pressure?

Chlorine, bromine and iodine. Why?

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Chemistry

Jamal

Which of the forces of molecular attraction is the weakest?

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Chemistry

Emmett Jordan

Which is an example of an element?

A) Salt (NaCl)

B) Water (H2O)

C) Silver (Ag)

D) Electron (electron (e-)

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Chemistry

Charmer

How many valence electrons does lithium (Li) have available for bonding?

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Chemistry

Charlie Allison

Nitrogen gas is collected over water in a eudiometer. The volume of the nitrogen gas is 45.5 mL, the atmospheric pressure is 756.0 mm Hg, the water temperature is 24.0C, and the water level inside the eudiometer is the same as the level of water in the beaker.

(a) Calculate the pressure of the dry nitrogen gas. Bax your answer

(b) Calculate the volume of the nitrogen gas at STP.

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Chemistry

Adam Lowe

On the lab bench there are four solutions; one is yellow and the other three are colorless. Which of the following four transition metal compounds is likely the yellow solution? On the lab bench there are four solutions; one is yellow and the other three are colorless. Which of the following four transition metal compounds is likely the yellow solution? Why?

[Cr (NH3) 6]Cl3

K[V (C2O4) 3]

[Ti (H2O) 6]Cl4

[Zn (en) 2]Br2

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Chemistry

Dalia Avery

How can there be snow near a giraffe's home

This is actually science so yeah

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Chemistry

Rayan

Which are examples of dynamic equilibrium? Check all that apply.

A cooking pot left under a dripping faucet eventually fills with water and overflows.

A person's bank account balance remains constant because income and expenses are equal.

When a small amount of sugar is added to pure water, the sugar dissolves completely.

When humidity is high, the rate at which water evaporates from the surface of a puddle is the same as the rate at which water vapor condenses from the air, so the puddle's size does not change.

Sodium moves between many different compounds during chemical reactions on Earth, but the total amount of sodium on Earth is constant.

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Chemistry

Heidy

A solid yellow stripe is to be painted in the middle of a certain highway. If 1 gallon of paint covers an area of p square feet of highway, how many gallons of paint will be needed to paint a stripe t inches wide on a stretch of highway m miles long

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Chemistry

Lexie Mcknight

A 0.45-g sample of aspirin is decomposed into its constituent elements and found to contain 0.27 g C, 0.020 g H, and 0.16 g O. Calculate the mass percent composition of C, H, and O in aspirin.

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Chemistry

Chase

What volume of 6.00 m naoh would be required to increase the ph to 4.93?

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