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3 years ago

How do I answer and do this

Chemistry

1 answer:

Alecsey [184]3 years ago

3 0

a) When the reaction takes place a yellow precipitate will be formed.

b) The law of conservation of mass is true.

<u>Explanation:</u>

a) When a lead nitrate solution is mixed with a potassium chromate solution, a yellow precipitate containing lead forms according to the equation:

$Pb(NO_3)_2 (aq) + K_2CrO_4 (aq)$ → $2 KNO_3 (aq) + PbCrO_4(s).$

b) Law of conservation of mass for the given reaction is true.

From the given table we know the mass of reactants and its products.

Law of conservation of mass is a principle when a reaction takes place in a closed system, the mass of the products and reactants in the system doesn't change.

⇒The sum of the mass of the reactants = The sum of the mass of the products.

The sum of the reactants = 128.71+128.97.

= 257.68 g.

The sum of the products = 154.10+103.58.

= 257.68 g.

Thus law of conservation of mass is true for the above reaction.

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3 years ago

i need to do a science project and i have to write about "reducing ocean pollution" could anybody give my ideas? THANKS CHICAS

earnstyle [38]

Answer:

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Explanation:

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3 years ago

In a molecule of fluorine, the two shared electrons give each fluorine atom how many electron(s) in the outer energy level

timofeeve [1]

Answer:

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Explanation:

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3 years ago

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Vikentia [17]

Answer:

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Durability and heaviness.(texture)

Explanation:

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A mixture of Aluminum and tin can also be separated by magnet.

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4 years ago

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raketka [301]

Explanation:

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3 years ago