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kiruha [24]
3 years ago
7

Can anyone help with this?

Chemistry
1 answer:
8090 [49]3 years ago
3 0
Yes what is it..we can help you
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2 radioactive isotopes of oxygen?
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<span>Oxygen-15 is an isotope of oxygen, frequently used in positron emission tomography, or PET imaging. It has 8 protons, 7 neutrons, and 8 electrons. The total atomic mass is 15.0030654 amu. It has a half-life of 122.24 seconds.</span>
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Wood burns in the presence of oxygen in the air and produces fire. After all the wood is burned, the fire stops. What is the exc
worty [1.4K]

Answer:

oxygen

Explanation:any reaction with burning involves mixing oxygen

this is correct

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4 0
3 years ago
What mass in grams of hydrogen is produced by the reaction of 2.0 g of magnesium? (Make sure to balance the reaction first)
denpristay [2]

Answer:

0.164541341 g H2

Explanation:

1) Convert grams to moles by dividing by RMM of Magnesium (24.31g).

  2g Mg * (1 mol Mg / 24.31 g Mg) = 0.082270671 mol of Mg

2) Use the balanced equation's ratio of 1 mol Mg: 1 mol H2.

  0.082270671 mol of Mg = 0.082270671 mol of H2

3) Convert the mol of H2 back into grams by multiplying by H2's RMM (2 g).

  0.082270671 mol of H2 * 2 g H2 = 0.164541341 g H2

* Answer can be rounded to your liking *

7 0
3 years ago
Can you please find the answer key for this from internet?
aev [14]
Found it http://my.ccsd.net/userdocs/documents/uGKpi9UAEwFpSIgE.pdf




5 0
3 years ago
PLEASE HELP URGENT ( photo included)
elena-14-01-66 [18.8K]

Answer:

B

Explanation:

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