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2 years ago

HELPPPPPP MEEEE‼️‼️‼️Use the equations from

Chemistry

1 answer:

Step2247 [10]2 years ago

8 0

1.180
2.-900
3.20
4.8
Hope this helps

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To answer this question, you will need to write the balanced equation and set up a BCA table. Using appropriate rounding rules,

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Water decomposes when electrolyzed to produce hydrogen and oxygen gas. If 2.5 grams of water were decomposed 1.04 grams of oxygen will be formed.

BCA table:

2 $H_{2}$ O ⇒ $H_{2}$ + $O_{2}$

B 0.13 0 + 0

C -0.13 0.065 + 0.065

A 0 0.065

Explanation:

Balanced equation for water decomposition into hydrogen and oxygen gases

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B 0.13 0 + 0

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Number of moles of water = $\frac{mass}{atomic mass of 1 mole}$

mass = 2.5 grams

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n = $\frac{2.5}{18}$

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so, 0.13 moles of water will give x moles of oxygen on decompsition

$\frac{1}{2}$ = $\frac{x}{0.13}$

x = 0.065 moles of oxygen will be formed.

moles to gram will be calculated as

mass =number of moles x atomic mass

= 0.065 x 16

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