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Katyanochek1 [597]
3 years ago
14

Which of the following is a chemical change?I

Chemistry
1 answer:
Sergeu [11.5K]3 years ago
3 0

Answer:

combustion is a chemical change

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35.0 mL of 12.0 M HCl is added to enough water to have a final volume of 1.20 L. What is the molarity of the final solution?
creativ13 [48]
<h3>Answer:</h3>

0.35 M

<h3>Explanation:</h3>

<u>We are given;</u>

  • Initial volume as 35.0 mL or 0.035 L
  • Initial molarity as 12.0 M
  • Final volume is 1.20 L

We are required to determine the final molarity of the solution;

  • Dilution involves adding solvent to a solution to make it more dilute which reduces the concentration and increases the solvent while maintaining solute constant.
  • Using dilution formula we can determine the final molarity.

M1V1 = M2V2

  • Rearranging the formula;

M2 = M1V1 ÷ V2

     = (12.0 M × 0.035 L) ÷ 1.2 L

      = 0.35 M

Thus, the final concentration of the solution is 0.35 M

6 0
3 years ago
Why is it important to start at the zero mark of a ruler/meterstick + triple beam balance when making measurements?
sergeinik [125]
Because if you start at one for example you starting at a extra cm/m/mm. So when you get your measurement result it will be wrong by just one cm/m/mm. Hope this wasn't too confusing.
3 0
3 years ago
flammable liquid is being pumped out of a drum into a bucket using a hand pump. describe an appropriate grounding and bonding pr
lutik1710 [3]

When transferring flammable liquids from storage drums to smaller electrically conductive containers, bonding and grounding are required. In any workplace, you should do the same whenever you move these liquids between conductive containers.

<h3>What exactly occurs in this case?</h3>

Ground dispensing drums in the area for storing and dispensing flammable liquids. Connecting the container to an already grounded, electrically conductive object grounds it. This could be a grounded metal construction framework, a buried metal plate, a metallic subsurface gas piping system, or metal water pipes. Sparks are prevented from discharging by bonding the two containers together and grounding one of them. All connections for bonding and grounding must be made from bare metal to bare metal.

To know more about Flammable liquids, visit-brainly.com/question/3702349

#SPJ4

3 0
1 year ago
Which two of the four quantum numbers determine the energy level of an orbital in a multielectron atom? Which two of the four qu
Roman55 [17]

Answer:

The correct answer is - n and l.

Explanation:

The size of an orbital is determined by the principal number of shell which is represented by n. The larger the energy level (n) bigger the size of the orbital. N can be any integer value: 1, 2, 3 . . . . and so on.

l represents the angular momentum or subshell number provides the overall shape of an orbital in this subshell only integer values between 0 and n-1 are permitted.

Thus, n & l are two quantum numbers that determine the energy level of an orbital in a multielectron atom.

5 0
3 years ago
Based on the table above, oil would transfer heat the best because its specific heat is the
Rudik [331]

Answer:

First space: Corn oil

Second space: 2.50

Explanation:

Nice

4 0
3 years ago
Read 2 more answers
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