10. i really really need help plz don't waste time, thx :)

Chemistry

2 answers:

egoroff_w [7]3 years ago

6 0

Lollll lollll lolll lolll

Serjik [45]3 years ago

3 0

Dude use a calculator app

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How is this equation read? <br> 4Na (1) +Mn(SO 4 ) 2 (aq) Mn (3) +2Na 2 SO

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18. What is the percent by mass sugar of a solution made by dissolving 12.45 grams of sugar in 100 grams of water?

Fantom [35]

The percent by mass sugar of a solution : 11.07%

<h3>Further explanation</h3>

Given

mass of sugar = 12.45 g

mass of water = 100 g

Required

The percent by mass

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Mass of solution :

$\tt mass~sugar+mass~water=12.45+100=112.45~g$

Percent mass of sugar :

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A theory has lots of scientific evidence to back it up. We know this to be true based on lots of different diseases and studies of their spread.

A hypothesis is more of a starting point - an educated guess based on limited evidence. It requires further testing before becoming a theory.

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How many hydrogen atoms are in 5.20 mol of ammonium sulfide?

Fofino [41]

1) Molecular formula of ammonium sulfide

(NH4)2 S

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3) To pass to number of atoms multiply by Avogadro's number: 6.022 * 10^23

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<u>Explanation:</u>

To calculate the number of moles, we use the equation:

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