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antiseptic1488 [7]
3 years ago
11

What experimental observations indicate a chemical change is taking place?

Chemistry
1 answer:
Anestetic [448]3 years ago
6 0
A chemical change is characterized of the formation of new substances or a chemical reaction. There are a number of observations that we can see if this type of change happens. One would be the formation of gas bubbles, this indicates that one of the products is a gas. Another observation would be a formation of a precipitate in the solution, it would indicate that the new solid formed is not soluble in the solution. A permanent color change in the solution would also indicate a chemical change because it may be that the new substance that is formed has its own distinct color when in solution. 
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ivolga24 [154]

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A gel is a semisolid preparation that contains a gelling agent which provides stiffness to the preparation.

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brainly.com/question/5661562

4 0
2 years ago
A sample of oxygen gas occupies a volume of 250 mL at .8 atm of pressure. What volume will it occupy at 1.2 atm of pressure?
musickatia [10]
167 mL

P1V1 = P2V2
P1 = .8 atm
V1 = 250 mL
P2 = 1.2 atm

Solve for V2 —> V2 = P1V1/P2

V2 = (0.8 atm)(250 mL) / (1.2 atm) = 167 mL
7 0
3 years ago
12 Describe In your own words, describe the glassblowing process.
Vikentia [17]

Explanation:

To give the glass its final shape and size, it is blown into with a blowpipe, creating a sort of bubble of glass. To carry out this process, the blowpipe holding the glass must be placed on a steel stand. Then, the glass artist has to blow into the blowpipe while rotating it at the same

4 0
2 years ago
A gas cylinder initially contains 463 L of gas at a pressure of 159 atm. If the final volume of gas is 817 L, what is the final
Agata [3.3K]

Answer:

The final pressure is 90.1 atm.

Explanation:

Assuming constant temperature, we can solve this problem by using <em>Boyle's Law</em>, which states:

  • P₁V₁=P₂V₂

Where in this case:

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We <u>input the given data</u>:

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And <u>solve for P₂</u>:

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The final pressure is 90.1 atm.

6 0
2 years ago
Are all physical reactions reversible?
LUCKY_DIMON [66]

Answer: answer is A

Explanation:

6 0
3 years ago
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