3 years ago

Which of the following reactions are considered single replacement reactions? (2 points) pls help me

1 answer:

solong [7]3 years ago

6 0

I agree with the person above

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Komok [63]

A I just took the test

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3 years ago

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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4 years ago

Klio2033 [76]

What kind of energy transfer

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3 years ago

anygoal [31]

Answer: G

5+5=10

10-5=5

5 g of gas escaped

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3 years ago

Marat540 [252]

The right answer is D - mass.

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3 years ago