2 years ago

Describe three signs that a chemical reaction has taken place and give an example of each sign

Chemistry

1 answer:

il63 [147K]2 years ago

7 0

Color change, temperature change, bubbling, state change

green to blue, hot to cold, bubbles (lol), and liquid to gas

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BartSMP [9]

Answer:

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Explanation:

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3 years ago

What happened to the sound as vibration of an object increase in strength

svlad2 [7]

Answer:

A.The sound becomes louder.

And

C.The sound waves get further.

Explanation:

Louder the sound it will travel long.

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2 years ago

Suggest why it might be difficult and dangerous to test sodium for electrical conductivity?

lukranit [14]

Answer:

It might cause fire or extreme smoke.

Explanation:

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2 years ago

A light bulb has a resistance of 96.8 Ω. What current flows through the bulb when it is connected to a 120 V source of electrica

Finger [1]

Answer:

I = 1.23 A

Explanation:

Given that,

The resistance of the lightbulb, R = 96.8 Ω

Voltage, V = 120 V

We need to find the current flows through the lightbulb. Let the current be I. We can use the ohm's law to find it i.e.

$V=IR\\\\I=\dfrac{V}{R}\\\\I=\dfrac{120}{96.8}\\\\I=1.23\ A$

So, the current flows through the bulb is 1.23 A.

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2 years ago

Calculate the molarity of the solution.

Ainat [17]

Molarity = moles of solution/ liter of solution
4.32x10^2/20
432/20=
21.6 M

4 0

3 years ago

Read 2 more answers