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liraira [26]
3 years ago
11

Tell me what happens during Observing a chemical change

Chemistry
1 answer:
worty [1.4K]3 years ago
6 0

Explanation:

Gas bubbles can appear, there may be a color change, there may be a temperature change, there could be the production of light, volume change, change in smell or taste, or formation of a precipitate.

In a chemical change, atoms react with each other to form a new substance/product.

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How is thermal energy transferred during conduction? Check all that apply.
Gnoma [55]

Answer:

Option 2, 3, and also 6 btw

Explanation:

The other guy was wrong

5 0
2 years ago
The air inside a bicycle tire pump has 27 joules of heat conducted away from while 77.9 joules of work done are being done on it
tatyana61 [14]

Answer:

51 J

Explanation:

The air inside a bicycle tire pump has 27 joules of heat conducted away. By convention, when heat is released, it takes the negative sign, so Q = -27 J.

77.9 joules of work done are being done on the air inside a bicycle tire pump. By convention, when work is being done on the system, it takes the positive sign, so W = 77.9 J

We can calculate the change in the internal energy (ΔU) using the following expression.

ΔU = Q + W

ΔU = (-27 J) + 77.9 J

ΔU =  51 J

7 0
3 years ago
Help me with this question please.
Salsk061 [2.6K]

Explanation:

current =  \frac{voltage}{resistance}  \\ i = \frac{v}{ohm}  \\  i  = \frac{240}{38}  \\ i = 6.3158 \: amps

hope it helped

pls mark BRAINLIEST

thanks

8 0
3 years ago
What does in the zone mean in a picture and a idiom? (Please answer this as soon a possible!)
julia-pushkina [17]
If you are in the zone, you are happy or excited because you are doing something very skilfully and easily.
5 0
3 years ago
Which were Lenin's actions before and during the Russian Revolution? Check all that apply.
Stolb23 [73]

Answer:

He supported the ideology of Marxism.

He opposed the tsar and was exiled.

He led the Bolsheviks.

Explanation:

Lenin was Russian Revolution political theorist. He served as first founding head of government of Soviet Russia. He supported the ideology of Marxism and opposed Tsar.

7 0
3 years ago
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