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2 years ago

Which of these equations is balanced?

Chemistry

2 answers:

olga nikolaevna [1]2 years ago

4 0

Both are already balanced. So, your answer would be: C. a and b

skelet666 [1.2K]2 years ago

3 0

To calculate your answer:
list atoms
multiply by subcript outside parentheses
multiply by coefficient

<span>3 H2SO4 + 2Al → Al2(SO4)3 + 3H2

H 2 x3 =6 H 2 x 3 = 6
S 1 x 3 = 3 S 1x 3 = 3
O 4 x3 = 12 O 4 x 3 = 12
Al 1 x 2 = 2 Al 2

This one is balanced . . . now you try the other one. Let me know if you still need help</span>

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Answer:

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2 years ago

What is the molarity (M) of the following solutions?

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Answer:

The molarity (M) of the following solutions are :

A. M = 0.88 M

B. M = 0.76 M

Explanation:

A. Molarity (M) of 19.2 g of Al(OH)3 dissolved in water to make 280 mL of solution.

Molar mass of Al(OH)3 = Mass of Al + 3(mass of O + mass of H)

= 27 + 3(16 + 1)

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= 78 g/mole

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Given mass= 19.2 g/mole

$Mole = \frac{Given\ mass}{Molar\ mass}$

$Mole = \frac{19.2}{78}$

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$Molarity = \frac{0.246}{0.280)}$

Molarity = 0.879 M

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B .The molarity (M) of a 2.6 L solution made with 235.9 g of KBr

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Given mass = 235.9 g

$Mole = \frac{235.9}{119}$

Moles = 1.98

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$Molarity = \frac{1.98}{2.6)}$

Molarity = 0.762 M

Molarity = 0.76 M

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