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Fudgin [204]
3 years ago
5

Which will ensure laboratory safety during the experiment? Check all that apply.

Chemistry
2 answers:
dangina [55]3 years ago
7 0

Explanation:

While performing any experiment it is important to take proper safety measures so that any kind of accident will be avoided.

For example, using tongs to handle hot beaker is a safety measure as tongs protect our hands from burning if we bare handedly try to touch the beaker.

Thus, we can conclude that out of the given options, following are the safety measures.

  • Using beaker tongs to handle the hot beaker.
  • Turning off the hot plate after use.
gtnhenbr [62]3 years ago
3 0

The following will ensure laboratory safety during an experiment;

1) Using tongs to handle a hot beaker: This prevents direct contact with the hot beaker and avoids burns

5) Turning off the hot plate after use: If the hot plate is left on, it could injure anyone who might touch it accidentally

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If 1.0 mole of neon, 2.0 moles of helium, and 3.0 moles of argon are mixed, what is the mole fraction of helium?
alexandr1967 [171]

The mole fraction of helium is 0.33.

The mole fraction can be calculated with the aid of dividing the number of moles of 1 factor of an answer by means of the overall number of moles of all the additives of a solution. it's far noted that the sum of the mole fraction of all the components in the solution should be same to one.

Mole fraction is a unit of attention. within the answer, the relative amount of solute and solvents are measured by the mole fraction and it is represented. The mole fraction is the wide variety of moles of a specific thing within the solution divided by way of the entire wide variety of moles.

Mole fraction represents the quantity of molecules of a selected thing in a combination divided by using the total variety of moles within the given mixture. it is a manner of expressing the concentration of a solution. consequently, the sum of mole fraction of all of the additives is always equal to one.

Mole of neon = 1

mole of helium = 2

mole of argon = 3

Total mole = 1 + 2 + 3 = 6

Mole fraction = mole of helium / total mole

                      =  2 / 6 = 0.33

Learn more about mole fraction here:-brainly.com/question/1601411

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7 0
1 year ago
Which is true about covalent compounds?
Anton [14]
Covalent compounds have a low boiling point. All the other answers apply to ionic compounds.
3 0
3 years ago
Read 2 more answers
5. The Ks for silver chloride is 1.8 x 10-lat
AnnZ [28]

Answer:

bueno

Explanation:

hijonshsjijagha

6 0
2 years ago
Perform the following
neonofarm [45]
Si muy bien chao que tengas un buen día
3 0
3 years ago
Determine the volume of a 0.800 M K2Cr2O7 solution required to completely react with 4.24 g of Cu.
Pachacha [2.7K]

<u>Answer:</u> The volume of solution required is 0.0275 L.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Given mass of copper = 4.24 g

Molar mass of copper = 63.55 g/mol

Putting values in above equation, we get:

\text{Moles of copper}=\frac{4.24g}{63.55g/mol}=0.067mol

The chemical equation for the reaction of potassium dichromate and copper follows:

K_2Cr_2O_7+3Cu+7H_2SO_4\rightarrow 3CuSO_4+Cr_2(SO_4)_3+K_2SO_4+7H_2O

By Stoichiometry of the reaction:

3 moles of copper reacts with 1 mole of potassium dichromate.

So, 0.067 moles of copper will react with = \frac{1}{3}\times 0.067=0.022mol of potassium dichromate

To calculate the volume of potassium dichromate, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}

We are given:

Moles of potassium dichromate = 0.022 mol

Molarity of solution = 0.800 M

Putting values in above equation, we get:

0.08mol/L=\frac{0.022mol}{\text{Volume of solution}}\\\\\text{Volume of solution}=0.0275L

Hence, the volume of solution required is 0.0275 L.

6 0
3 years ago
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