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Rus_ich [418]
3 years ago
13

if you throw a heavy log into the fireplace, after it burns you are left with some ash. the ash has a mass much less then the ma

ss of the original log. this seems to go against the law of conservation of mass. please explain what we are forgetting.
Chemistry
1 answer:
Harrizon [31]3 years ago
8 0

Answer: ?

Explanation:

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Which statement describes J.J. Thomson’s plum-pudding model of the atom?
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Which type of radiation involves the conversion of a neutron into a proton?
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How many grams of NaCl are in 3.5 mol of NaCl? Also, how many moles of NaCl are in 150 g of NaCl?​
alexandr402 [8]

Answer:

204.5505 grams

2.5666 moles

Explanation:

For the first question, multiply 3.5 (# of moles) by 58.443 (g/mol for NaCl).

58.443 * 3.5

<em>I'll distribute 3.5 into 58.443.</em>

(3.5 * 50) + (3.5 * 8) + (3.5 * 0.4) + (3.5 * 0.04) + (3.5 * 0.003)

175 + 28 + 1.4 + 0.14 + 0.0105

203 + 1.4 + 0.14 + 0.0105

204.4 + 0.14 + 0.0105

204.54 + 0.0105

204.5505 grams

There are 204.5505 grams in 3.5 moles of NaCl.

For the second question, divide 150 (# of grams) by 58.443 (g/mol for NaCl). I'll convert both into fractions.

150/1 * 1000/58443

150000/58443

2.56660336 moles

2.5666 moles (rounded to 4 places to keep consistency with the first answer) are in 150 grams of NaCl.

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3 years ago
Which type of decay has the greatest mass?<br> A.<br> alpha<br> B. beta<br> gamma<br> D.<br> nuclear
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Answer:

Alpha has the greatest mass- A.

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2 years ago
Read 2 more answers
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