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Thomas
ChemistryChemistry
How many grams of Br are in 2.0 moles of CaBr2?
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Shamar Krause
ChemistryChemistry
Mass box A = 10 grams; Mass box B = 5 grams; Mass box C-made of one A and one B

How much A and B would be needed to produce 30 grams of C? g of A; g of B.
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Jonathan Lamb
ChemistryChemistry
How many moles of tin atoms are in a pure tin cup with a mass of 37.6 g?
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Anastasia Ayers
ChemistryChemistry
Which best explains how Dmitri Mendeleev organized elements in his periodic

table?

O

A. Elements were ordered based on their discovery date.

O

B. Elements were ordered based on their economic value.

O

C. Elements with similar properties were grouped together.

D. Elements with similar atomic masses were grouped together.
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Desmond Perry
ChemistryChemistry
The rocks and minerals of the Earth consist of compounds.
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Cheeky
ChemistryChemistry
Do the number of protons in an atom of an element always equals its atomic weight.
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Slade Maynard
ChemistryChemistry
Calculate the [oh-] in a solution with a ph of 12.52.
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Cheese
ChemistryChemistry
Which of the following months would be the darkest at the South Pole?

January

December

August

February
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Babs
ChemistryChemistry
The half-life of a certain radioisotope is 8 days. How much (mass) of a 80 mg sample will remain after 24 days?
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Quentin
ChemistryChemistry
BF3 type of compound
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Catalina Rogers
ChemistryChemistry
What direction do electrons flow in an electrolytic cell?

A. From cathode to anode

B. From anode to cathode

C. Through the salt bridge

D. From electrode to electrolyte
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Finley Mullen
ChemistryChemistry
What is the atomic nucleus made of?

only neutrons

electrons

only protons

nucleons
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Hull
ChemistryChemistry
How many ml of 2.50 m hno3 are needed to prepare a 75.0 ml of 1.00 m hno3?
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Macey Ayala
ChemistryChemistry
For the reaction

CH3OH + O2 → HCO2H + H2O,

what is the maximum amount of HCO2H

which could be formed from 8.02 mol of

CH3OH and 15.49 mol of O2?
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Kate Schultz
ChemistryChemistry
How are large polymers formed?
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