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Vesna [10]
3 years ago
13

Bromine gas in a container is heated over a flame. What happens to the average kinetic energy of the bromine particles? It decre

ases rapidly. It increases quickly. It remains the same. It decreases slowly.
Chemistry
2 answers:
Hatshy [7]3 years ago
7 0

Answer: B. It increases quickly

Explanation:

deff fn [24]3 years ago
3 0

Answer:

b edg 2020

Explanation:

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How many grams are in 0.040 moles zirconium (Zr)?
Anton [14]

Answer:

91.224 gram

Explanation:

7 0
3 years ago
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Please help! Thanks
GarryVolchara [31]
I believe the third choice is correct.

This can be proven by the fact that to find the molar mass of a compound, you simply add the molar masses of all the atoms within the compound

Hope this helps
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When Earth’s axis points away from the sun, the _________ Hemisphere has the longer days of summer.
Llana [10]

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Explanation: I looked it up. Plus I took a test with this question and when the teacher went over the answer i got it right.

3 0
2 years ago
Water can be formed in the following reaction: 2H2 + O2 —> 2H2O. If you have 12 moles of Hydrogen gas (H2), how many moles of
Kaylis [27]

Answer: 6

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3 0
3 years ago
Thallium-207 decays exponentially with a half life of 4.5 minutes. if the initial amount of the isotope was 28 grams, how many g
Agata [3.3K]
An exponential decay law has the general form: A = Ao * e ^ (-kt) =>

A/Ao = e^(-kt)

Half-life time => A/Ao = 1/2, and t = 4.5 min

=> 1/2 = e^(-k*4.5) => ln(2) = 4.5k => k = ln(2) / 4.5 ≈ 0.154

Now replace the value of k, Ao = 28g  and t = 7 min to find how many grams of Thalium-207 will remain:

A = Ao e ^ (-kt) = 28 g * e ^( -0.154 * 7) = 9.5 g

Answer 9.5 g.
7 0
3 years ago
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