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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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Consider the following reaction: 3Fe(s) + 4H₂O(g) ➞ Fe₃O₄(s) + 4H₂(g). To answer the following question: "How many moles of hot
Elodia [21]

Answer: 2

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}

\text{Moles of} Fe_3O_4=\frac{275g}{233.5g/mol}=1.18moles

3Fe(s)+4H_2O(g)\rightarrow Fe_3O_4(s)+4H_2(g)  

According to stoichiometry :

1 mole of Fe_3O_4 are produced by = 4 moles of H_2O

Thus 1.18 moles of Fe_3O_4 will be produced by=\frac{4}{1}\times 1.18=4.72moles  of H_2O

Mass of H_2O=moles\times {\text {Molar mass}}=4.72moles\times 18g/mol=85.0g

Thus 85.0  g of H_2O will be required and 2 steps are required to get the answer.

6 0
3 years ago
KOH+HBr-KBr+H2O which is the base in this reaction​
krek1111 [17]

Answer:

KOH is the base in this reaction

Explanation:

HBr is the acid in this reaction.

Hope this help you. Have a nice day !

8 0
3 years ago
Which of these equations is balanced, and which is not balanced? Explain how you can tell.
disa [49]

Answer:

a is balanced

Explanation:

a) reactant/ product

(2x2)=4c / 4c

(2x6)=12h / 12 h

14o / (8o+6o)=14 o

5 0
3 years ago
Which of the following groups would be found on an alcohol molecule?
photoshop1234 [79]

<span>I’ve answered this question before so if these are the choices to the question presented:

An oxygen atom double-bonded to a carbon atom, with a hydrogen atom single-bonded to the same carbon atom. </span><span>

<span>A hydrogen atom covalently bonded to an oxygen atom, which is covalently bonded to a carbon in the carbon chain. </span>

<span>A carbon atom single-bonded between two other carbon atoms, with an oxygen atom double-bonded to the central carbon atom as well. </span>

<span>An oxygen atom single-bonded between two carbon atoms within a carbon chain. 


Then, the answer would be “a hydrogen atom covalently bonded to an oxygen atom, which is covalently bonded to a carbon in the carbon chain.<span>”</span></span></span>

5 0
3 years ago
Hat is the gram formula mass of caso4 •2h2o
Trava [24]
Your answer would be 172.1703 g/ml
7 0
3 years ago
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