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Stolb23 [73]
3 years ago
7

What does the law of conservation of mass say?

Chemistry
1 answer:
yaroslaw [1]3 years ago
3 0

Answer:

A) the mass of product in a chemical reaction is equal to the mass of the reactant.

Explanation:

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

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Answer:

A.PbCl2

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Explanation:

\bold{PbO_2+4HCl\rightarrow PbCl_2+Cl_2+2H_2O}

PbCl_2\:\&\: Cl_2 are the products in the given chemical reaction.

Hope it helps you in your learning process

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13C NMR is a technique in which the total number of signals represents the number of unique carbon atoms in a molecule. Propose
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4 years ago
Which of the following errors could cause your percent yield to be falsely high, or even over 100%?
makkiz [27]

Answer:

B.Handling the crucible directly with your hands.

D.Taking the mass of the empty crucible without the lid, but including the lid in all other mass measurements.

E.Taking the mass of all samples with the lid included.

Explanation:

When observed critically , the measures associated with the errors which could cause your percent yield to be falsely high, or even over 100% are those which increase the weight of the substance with the individual neglecting.

Handling the crucible directly with your hands,Taking the mass of the empty crucible without the lid, but including the lid in all other mass measurements and taking the mass of all samples with the lid included will all increase the weight of the substance. Instead the substance should be placed alone without any form of support or contamination.

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How would scientific experiments change if scientists had no tools to use?
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What is the density of an object that has a mass of 5kg and a volume of 50cm(3)
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5/50/100³

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10^5<span> kg/m</span>³
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