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inysia [295]
3 years ago
10

6. Balance the following equations (3 points)

Chemistry
2 answers:
Schach [20]3 years ago
8 0

a.  FeCl3 + 3 NaOH = Fe(OH)3 + 3 NaCl

b. 2 C2H2 + 5 O2 = 4 CO2 + 2 H2O

c. Fe2O3 + 3 H2 = 2 Fe + 3 H2O

SSSSS [86.1K]3 years ago
6 0

The answer is

a.  FeCl3 + 3 NaOH = Fe(OH)3 + 3 NaCl

b. 2 C2H2 + 5 O2 = 4 CO2 + 2 H2O

c. Fe2O3 + 3 H2 = 2 Fe + 3 H2O


To balance equations you basically have to make sure each element has an equal amount or number on each side of the equation. If you need more help understanding this, feel free to ask.

:)

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How much ch2o is needed to prepare 445 ml of a 2.65 m solution of ch2o?
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Answer: 35.4 grams

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

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Putting in the values we get:

2.65=\frac{n\times 1000}{445ml}

n=1.18

Mass of solute in g=moles\times {\text {molar mass}}=1.18mol\times 30.02g/mol=35.4g

Thus 35.4 grams of CH_2O is needed to prepare 445 ml of a 2.65 m solution of CH_2O.

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The answer could be It is a well known fact that energy can neither be created and nor be destroyed but can be transformed from one form to another.

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