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2 years ago

Which of the following definitions describes a chemical hazard?

Chemistry

2 answers:

maria [59]2 years ago

8 0

Answer:

a. Can be present in dust, fumes, liquids, solids, mists, vapors, or gases of products used at a site or released during a construction job

Explanation:

Chemical hazard is a hazard caused by exposition to chemical dangers in the work place, chemicals can cause damage to humans and animals because they can be present in dust, fumes, liquids solids, mists vapors or gases, and they are difficult to detect, that is why they are very dangerous since they are really hard to detect.

Monica [59]2 years ago

7 0

I think it would be A because hazardous waste would most likely be found in dust, fumes etc. I'm not sure though.

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For all of the following questions 20.00 mL of 0.200 M HBr is titrated with 0.200 M KOH.

HACTEHA [7]

Answer :

The concentration of $H^+$ before any titrant added to our starting material is 0.200 M.

The pH based on this $H^+$ ion concentration is 0.698

Explanation :

First we have to calculate the concentration of $H^+$ before any titrant is added to our starting material.

As we are given:

Concentration of HBr = 0.200 M

As we know that the HBr is a strong acid that dissociates complete to give hydrogen ion $H^+$ and bromide ion $Br^-$ .

As, 1 M of HBr dissociates to give 1 M of $H^+$

So, 0.200 M of HBr dissociates to give 0.200 M of $H^+$

Thus, the concentration of $H^+$ before any titrant added to our starting material is 0.200 M.

Now we have to calculate the pH based on this $H^+$ ion concentration.

pH : It is defined as the negative logarithm of hydrogen ion concentration.

$pH=-\log [H^+]$

$pH=-\log (0.200)$

$pH=0.698$

Thus, the pH based on this $H^+$ ion concentration is 0.698

3 0

2 years ago

What is meant by conversion of energy

MissTica

the process of changing one form of energy into another

4 0

2 years ago

Recently, the United States government decided to construct a huge crypt in the middle of Yucca Mountain in Nevada to bury high-

Anton [14]

The three concerns that the residents of this area might be:

1) The cost of not moving forward is extremely high, so they opposed the plan, as they think it would affect US economy

2) Nuclear waste disposal capability is an environmental imperative, so their environment would be polluted by very radioactive materials.

3) Demand for new nuclear plants also demands disposal capability which supports national security but again, their site will be no longer for them. But unfortunately, Extensive studies consistently show Yucca Mountain to be a sound site for nuclear waste disposal so the plan can't be abolished.

Hope this helps!

4 0

3 years ago

Read 2 more answers

A trisubstituted cyclohexane compound is given below in its chair conformation. Draw the corresponding planar (overhead) represe

REY [17]

Answer:

See explaination

Explanation:

Chiral carbons are carbons that have four different groups, so C atoms 1, 4, and 5 are chiral carbons and thus H atoms are shown for those atoms.