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Alborosie
3 years ago
14

Before allowing an employee to enter an excavation at least four feet deep in must be tested for oxygen deficiency and toxic fum

es. True or false
Chemistry
2 answers:
DIA [1.3K]3 years ago
6 0

Answer:

The given statement is true.

Explanation:

As one goes deeper to the ground, there would be less availability of air and space for the air to come in. This signifies that the concentration of oxygen on the lower section of the excavation seems to be less in comparison to the upper ground. The deeper ground would also seem to comprise gas and oil that got developed by the millions of years’ procedure. These resources seem to be dangerous and toxic to get close by without gearing protective masks.

shepuryov [24]3 years ago
4 0
The answer to your question is True

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A flask contains 0.340 mol of liquid bromine, br2. determine the number of bromine molecules present in the flask.
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7 0
3 years ago
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What mass of HgO is required to produce 0.692 mol of O2?<br><br>2HgO(s) -&gt; 2Hg(l) + O2(g)
Vika [28.1K]

The answer for the following problem is mentioned below.

  • <u><em>Therefore 298.44 grams of mercuric oxide is needed to produce 0.692 moles of oxygen molecule </em></u>

Explanation:

Given:

no of moles of the oxygen gas = 0.692

Also given:

2 HgO  → 2 Hg + O_{2}

where,

HgO represents mercuric oxide

Hg represents mercury

O_{2} represents oxygen

To calculate:

Molar mass of HgO:

Molar mass of HgO = 216 grams

molar mass of mercury (Hg) = 200 grams

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We know;

       2×216 grams of HgO   →  1 mole of oxygen molecule

             ?                              →  0.692 moles of oxygen molecule

       

          = \frac{2*216*0.692}{1}

      = 298.944 grams of HgO

<u><em>Therefore 298.44 grams of mercuric oxide is needed to produce 0.692 moles of oxygen molecule </em></u>

<u />

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