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3241004551 [841]
3 years ago
13

Which chemical equation below does not illustrate the Law of Conservation of Mass?

Chemistry
2 answers:
Wewaii [24]3 years ago
7 0
The last chemical equation doesn't follow the law of conservation because there isn't an equal number of zinc
Anarel [89]3 years ago
7 0

The correct answer is this: 2Zn + 2HCl --> ZnCl2 + H2.

The law of conservation of mass states that matter can neither be created nor destroyed. The implication of this law in chemical equations is that, the number of atoms and molecules that is present in reactants must be equal to those present in the products. That is, for the reactants and the products, the number of atoms and molecules that takes part in the reaction must remain the same, no addition, no subtraction. Looking at the last option given in the question above, one will notice that two zinc atoms are present in the reactants while only one is present in the products, thus, in this case the law of conservation of mass was not obeyed.

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How many atoms of San are in 0.796 moles of this element
xenn [34]

Answer:

4.8× 10²³ atoms

Explanation:

Given data:

Number of moles of San element = 0.796 mol

Number of atoms present = ?

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

0.796 mol ×  6.022 × 10²³ atoms / 1mol

4.8× 10²³ atoms

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Answer:

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Explanation:

The amount of heat required is determined from the formula:

q= mcΔT

To see more:

https://api-project-1022638073839.appspot.com/questions/what-is-the-specific-heat-of-a-substance-if-1560-cal-are-required-to-raise-the-t#235434

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