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ChemistryChemistry
Zane Foley
True or false? All atoms of the same element have the same atomic mass
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ChemistryChemistry
Bud
Write a balanced equation for the reaction of copper with silver nitrate. According to the balanced equation, what is the mole ratio of silver produced to copper reacted?

_ mol Ag produced : _mol Cu created
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ChemistryChemistry
Chris
Describe what happens to the potential energy if you increase the mass of the object.

IL
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ChemistryChemistry
Wendy Casey
The mass of the ocean is about 1.8 X 10^21 kg. If the ocean contains 1.076% sodium ion, Na+, what is the mass in kilograms of sodium in the ocean?
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ChemistryChemistry
Kiera
How many formula units are contained in 23.5 g of Sb2S3
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ChemistryChemistry
Nylah Meadows
How many nuclear power plants are there in pennsylvania?
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ChemistryChemistry
Izaiah Choi
Polar molecules are often able to dissolve in water because

a. The partially charged regions of polar molecules are able to form hydrogen bonds with water molecules.

b. The polar molecules repel each other, allowing them to interact with the water molecules.

c. The polar molecules attract each other, allowing water molecules to adsorb to them.

d. Polar molecules are able to fill their valence shells by transferring electrons from water molecules.
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ChemistryChemistry
Rodney Oneill
An evacuated reaction vessel is filled with 0.800 atm of N₂ and 1.681 atm of Br₂. When equilibrium is established according to the reaction below, there are 1.425 atm of Br₂ remaining in the vessel. What is the equilibrium partial pressure of NBr₃? 2 NBr₃ (g) ⇌ N₂ (g) + 3 Br₂ (g)
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ChemistryChemistry
Claudia Pittman
The accepted value is 1.43. Which correctly describes this student's experimental data?

TrialMeasurement11.2921.9330.88

Question 17 options:

accurate but not precise

precise but not accurate

both accurate and precise

neither accurate nor precise
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ChemistryChemistry
Flynn
6.

Which element has an atom with a total of three valence electrons?
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ChemistryChemistry
Kamron Meadows
Compare how mammals care for their young with the other groups of

animals.
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ChemistryChemistry
Kaylen Sherman
What is a chemical reaction that absorbs heat called?
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ChemistryChemistry
Scarlett Kelly
Which of these represents the release of chemical energy?

a. pouring gasoline into a tank

c. a toy car running down a ramp

b. burning charcoal in a grill

d. warming food in a microwave
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ChemistryChemistry
Jacob Guzman
Which statement describes magnetic field lines at the north and south pole of a bar magnet?

A. field lines begin near the magnet's south pole and extend toward its north pole

B. field lines begin near both the magnet's north and south poles and meet in the middle

C. field lines begin near the center of the magnet and extend toward the north and south poles

D. field lines begin near the megnet's north pole and extend toward it's south pole
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ChemistryChemistry
Cristina Cisneros
What is the charge on an electron? - 1 0 + 1 + 2
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