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3 years ago

13

What is a cool 1 week or less science fair project for grade 9?

2 answers:

Nina [5.8K]3 years ago

5 0

How different genres of music affect animals. If you have any hamsters, fish etc you can separate them and expose them to different types of music for long periods of time and observe their behavior. Make sure u have a control group which isn't listening to music.

Leno4ka [110]3 years ago

3 0

Make a fizzing volcano with facts and pictures of a volcano

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Which subatomic particles are found in the

pashok25 [27]

For any element the nucleus consists of neutrons and protons while electrons orbit around the nucleus, (3)

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3 years ago

If a solution has a pOH of 8.71, what is the [H+]?

TEA [102]

Answer: $5.1\times 10^{-6}M$

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

$pH=-\log [H^+]$

$pH+pOH=14$

Putting in the values:

$pH=14-8.71=5.29$

$5.29=-log[H^+]$

$[H^+]=5.1\times 10^{-6}$

Thus $[H^+]$ is $5.1\times 10^{-6}M$

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4 years ago

When sodium metal is treated with water we get gas which is absorbed by palladium metal is ?<br>

Scilla [17]

that gas is called hydrogen gas

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4 years ago

What compound does hydrogen form?

Oxana [17]

It forms covalent compounds

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3 years ago

Read 2 more answers

A car uses stored chemical energy in gasoline to move. The engine changes chemical energy into heat and ____ energy to power the

Salsk061 [2.6K]

I want to say Mechanical energy. Do you have answer choices?

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4 years ago