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4 years ago

Employee training is also a requirement of HAZCOM program. When hazardous chemicals are present, you must be trained:

2 answers:

6 0

(C) both are correct because if you are working in a Physical or health hazard area or if you are already working and you are going to be introduced to a hazardous situation you must be trained according to OSHA law.

lions [1.4K]4 years ago

6 0

Answer:

option c)

Explanation:

correct answer is option c)

Hazard communication (Haz Com) is a processes and procedures that company must implement at the workplace to effectively communicate to the employee so, that they can protect them self at any hazardous situation.

so, it is very essential to give training before the start of the assignment and also whenever new physical or health hazard is introduced.

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What is the molarity of a solution containing 501mL with 35g NaCl

Vesna [10]

Answer:

Data:

mass of solute: 35g of NaCl

m.mass of solute: 58g/mol

volume of solution: 501mL

Molarity=?

Explanation:

501ml = 0.5dm3

M= g of solute/m.mass of solute*vol of solution

M= 35/58*0.5

M=1.20

6 0

3 years ago

An aqueous solution of ammonia is found to be basic. This observation can be explained by the net ionic equationHNO3(aq) + H2O(l

jeka57 [31]

Answer:

$NH_3_{(aq)}+H_2O_{(l)}\rightarrow NH_4^+_{(aq)}+OH^-_{(aq)}$

Explanation:

Bases are the species which furnish hydroxide ions in the solution or is capable of forming bonds with electron deficient species as they are electron rich species. When a base accepts a proton, it changes into a acid which is known as its conjugate acid.

Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations. Only the species which are present in aqueous state dissociate. So, the net ionic equation of aqueous solution of ammonia is shown below as:-

$NH_3_{(aq)}+H_2O_{(l)}\rightarrow NH_4^+_{(aq)}+OH^-_{(aq)}$

6 0

3 years ago

A chemist wants to extract copper metal from copper chloride solution. The chemist places 0.50 grams of aluminum foil in a solut

andreyandreev [35.5K]

Answer & Explanation:

The replacement of aluminium (Al) by copper (Cu) can be represented by the following chemical equation:

3CuCl2 + 2Al = 2AlCl3 + 3Cu

We are given 0.50g of Al, and 0.75g of CuCl2

We calculate the maximum amount of copper by assuming one of the reactants (CuCl2 or Al) will be depleted.

Calculations:

The corresponding molecular masses are :

3CuCl2 = 3 (63.546+2*35.457) = 403.38 ...........(1)

2Al = 2*26.9815 = 53.963........................................(2)

2AlCl3 = 2 (26.9815+3*35.457) = 266.705 (we don't need to know this!)

3Cu = 3*63.546 = 190.638.......................................(3)

Assuming 0.50g of aluminium will be depleted with unlimited CuCl2, the amount of copper recuperated will be:

M1 = 0.50 *( (3)/(2) ) = 0.50*190.638/53.963 = 1.766 g

If 0.75g of CuCl2 were depleted with unlimited Al, the amount of copper recuperated will be

M2 = 0.75 * ( (3) / (1) ) = 0.75 * 190.638 / 403.38 = 0.354 g < M1

Therefore CuCl2 is the limiting reagent.

Since we can obtain the maximum amount of copper from the limiting reagent (CuCl2), so the required maximum amount is 0.35 g of copper.

8 0

3 years ago

What is the molecular geometry around a central atom that is sp3d hybridized and has three sigma bonds and two lone electron-pai

Evgen [1.6K]

Sp^3d hybridization means that there is a total of 5 electron regions, with two lone paid, the molecular shape would be T-shaped

5 0

4 years ago

What is the oxidation state of copper in Cu(C2H3O2)2? +2 -1 -2 +4 +1

uysha [10]

The answer should be 5 cu

3 0

3 years ago