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3 years ago

6. How is the law of conservation of mass shown by a balanced chemical equation?

Chemistry

1 answer:

tigry1 [53]3 years ago

6 0

Answer:

Any balanced equation shows the law of conservation of mass as the number of reactant used would be equal to the number of product formed

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3 years ago

A system gains 652 kJ of heat, resulting in a change in internal energy of the system equal to +241 kJ. How much work is done?

levacccp [35]

Answer:

-411 kj

Explanation:

We solve by using this formula

∆U = ∆Q + ∆W

This formula is the first law of thermodynamics

Change in internal energy U = +241

Heat gained by system Q = 652

Putting the value into the equation

+241 = 652 + W

Workdone = 241 - 652

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Since work done is negative it means that work was done by the system

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2 years ago

How many liters of carbon dioxide will 0.5 mole of lithium hydroxide (LiOH) absorb? (One mole of any gas occupies 22.4 L under c

Svet_ta [14]

Answer:

0.5 moles of LiOH will absorb 5.6 L of $CO_2$

Explanation:

According to law of conservation of mass, the sum of mass on the reactant side must be equal to the sum of mass on product side.

The balanced chemical equation is:

$2LiOH+CO_2\rightarrow Li_2CO_3+H_2O$

2 moles of LiOH absorb 1 mole of $CO_2$ i.e. 22.4 Liters at STP

0.5 moles of LiOH absorb

= $\frac{22.4}{2}\times {0.5}=5.6Liters$

0.5 moles of LiOH will absorb 5.6 L of $CO_2$

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3 years ago