1 year ago

Which feature of a balanced chemical equation demonstrates the law of conservation of mass?

1 answer:

7 0

Answer:

A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow.

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ValentinkaMS [17]

Given the mass of aluminum sulfide $Al_{2}S_{3}$ = 21.0 g

Molar mass of $Al_{2}S_{3}$ = $2 * Molar mass of Al + 3 *molar mass of S = 2(27g/mol)+3(32.g/mol)=150.g/mol$

Calculating the moles of $Al_{2}S_{3}$ :

$21.0 g *\frac{1 mol}{150 g} = 0.14 mol Al_{2}S_{3}$

Each mole $Al_{2}S_{3}$ has 3 mol S.

Each mole S constitutes $6.022*10^{23} atoms of S$

Calculating atoms of S in 0.14 mol $Al_{2}S_{3}$ :

$0.14 mol Al_{2}S_{3} *\frac{3mol S}{1 mol Al_{2}S_{3} }*\frac{6.022*10^{23}atoms S }{1 mol S}$

= $2.53 * 10^{23} atoms of S$

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3 years ago

Semenov [28]

16 and 6

Explanation:

the top number will be 16 and the bottom number will be 6

7 0

2 years ago

AlladinOne [14]

Answer:

Water ______________________________________________

3 0

3 years ago

mojhsa [17]

2H2 + O2 → 2H2O

okay???

4 0

3 years ago

lilavasa [31]

Answer:

-9.675

Explanation:

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3 0

2 years ago