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Marizza181 [45]
3 years ago
10

Complete the nuclear equation

Chemistry
1 answer:
allsm [11]3 years ago
5 0
In order to solve this question, we must apply the conservation of mass. The total number of nucleons (upper number) and protons (lower number) must be equal before and after the decay. The new nucleon number is
218 - 4
= 214
And new proton number is
84 - 2
= 82
Next, we must identify which element has the proton number 82. That would be lead, Pb.
Therefore, the answer is 
5. ²¹⁴Pb₈₂
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In Rutherford's gold foil experiment, most alpha particles passed through the gold foil without deflection and were detected on
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Answer:

Option D.

Explanation:

Some of the alpha particles Rutherford shot at the gold foil bounced back, some scattered; but the majority of them went right through. That meant there had to be some sort of positively charged subatomic particle in there that pulled them through, but it had to be at the center and couldn't take up a lot of room.

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Brianna explains to Logan the role of plants in the carbon cycle. Choose the sentence(s) that she includes in her explanation. S
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E) Plants take carbon from the atmosphere

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What location is 90 degrees away from the equator?
kirill115 [55]
C) both A and B

Each parallel measures one degree north or south of the Equator, with 90 degrees north of the Equator and 90 degrees south of the Equator
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Unsorted sands have a lower porosity.<br> True<br> O False
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PLEASE HELP ASAP!!!!!!!!!! WILL GIVE BRAINLIEST TO CORRECT ANSWER!
Natasha2012 [34]
Balance your chemical reaction first. Start by balancing carbon so you have 2 carbons on both sides.

C2H6 + O2 —> 2CO2 + H2O

Now balance your hydrogen so you have 6 hydrogens on both sides.

C2H6 + O2 —> 2CO2 + 3H2O

Now balance your oxygens. You have 7 oxygens on the right and 2 on the left, so multiply O2 by 3.5.

C2H6 + 3.5O2 —> 2CO2 + 3H2O

However, you can’t have a decimal in a coefficient. So, multiply everything by two.

2C2H6 + 7O2 —> 4CO2 + 6H2O

Now use your mole ratio of 6 mol H2O for every 2 mol of C2H6 to solve.

1.4 mol C2H6 • 6 mol H2O / 2 mol C2H6 = 4.2 mol H2O

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2 years ago
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