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IRINA_888 [86]
3 years ago
15

A radioactive isotope of potassium (k) has a half-life of 20 minutes. if a 36 gram sample of this isotope is allowed to decay fo

r 80 minutes, how many grams of the radioactive isotope will remain?
Chemistry
1 answer:
lawyer [7]3 years ago
5 0
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Which factor has the greatest effect on the melting point of a crystalline solid
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Whats the periodic table in order?
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I need help on this please
Montano1993 [528]

Answer:

3

Explanation:

There are three different elements in given chemical equation. These elements are hydrogen, oxygen and carbon.

Chemical equation:

2CH₄ + 4O₂       →       2CO₂ + 4H₂O

This equation shows the burning of methane. When methane burns in the presence of oxygen it produced water and carbondioxide.

We can see that all the reactant and product are made up of only three elements carbon, hydrogen and oxygen.

There are two reactant and two products in given reaction.

This reaction also follow the law of conservation of mass.

We can see that there are two carbon eight hydrogen and eight oxygen  atoms on both side of equation.

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7 0
3 years ago
Is the following chemical equation balanced?
FrozenT [24]

Answer:

No

Explanation:

The given equation is not balanced

Chemical equation:

KClO₄ → KCl + O₂

Given Balanced chemical equation:

KClO₄ → 2KCl + 2O₂

Correctly balanced chemical equation:

2KClO₄ → 2KCl + 4O₂

Now this equation is correctly balanced.

There are two potassium atom two chlorine atoms and eight oxygen atoms on both side of equation. So this is correctly balanced.

Coefficient with reactant and product:

KClO₄    2

KCl        2

O₂         4

5 0
3 years ago
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