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Chemistry
Guest
Which is a molecule?
A. Ne
B. NaCI
C. trail mix
D. graphene
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Chemistry
Jovan Shaw
1. An atom has 5 protons, 5 neutrons, and 8 electrons. What is its charge?
a. - 3
c. + 3
b. - 8
d. + 5
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Chemistry
Aj
How many atoms of phosphorus are represented by one formula unit of calcium phosphate?
A. 3
B. 6
C. 9
D. 12
E. 18
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Chemistry
Aryana Kelly
Select the correct answer.
The average annual rainfall for Boston is 43.76 inches. One year, a weather station measured the city's actual rainfall to be 33.45 inches. From this data, what was Boston experiencing?
A.
drought
B.
blizzard
C.
cold wave
D.
hurricane
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Chemistry
Snickers
Which substance can be decomposed by a chemical change?
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Chemistry
Fergie
Which statements describe global warming? Check all that apply.
Global warming can be decreased through deforestation.
Global warming occurs naturally.
Global warming results from the buildup of nutrients in runoff.
Global warming is likely increased by humans.
Global warming is enhanced by nonnative species.
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Chemistry
Lillie Buchanan
Which of the following statements is an inference?
A. She counts the robins in her yard once a week for two years.
B. She thinks some robins must migrate in the winter.
C. student notices that there are fewer robins in her yard during the winter.
D. She finds that there are about half as many robins in her yard in the winter as in the summer.
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Chemistry
Laci Taylor
Which is the correct name for P2O5? phosphorus dioxide phosphorus pentoxide diphosphorus pentoxide diphosphorus hexaoxide
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Chemistry
Imani
There are 2 moles of NaCl. How many atoms of NaCl do you have?
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Chemistry
Guest
A cube of aluminum is 20 cm on edge. aluminum has a density of 2.7 g/cm3 and a specific heat of 0.217 cal/g0c. what is the heat in calories needed to raise the temperature of the cube from 200 to 3000c?
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Chemistry
Ryann Manning
How would the world be different if people were not aware of radioactive decay
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Chemistry
Conrad Ramirez
What determines the amount of kinetic energy that an object has?
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Chemistry
Jase Dougherty
Compare and contrast the different way heat moves
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Chemistry
Luciano Powers
A mixture of 0.220 moles co, 0.350 moles f2 and 0.640 moles he has a total pressure of 2.95 atm. what is the pressure of co?
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Chemistry
Boo Boo
What is the electron configuration of a chlorine ion in a compound of BeCl2
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