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Drupady [299]
2 years ago
15

The number 0.0020 expressed in scientific notation is?

Chemistry
2 answers:
Feliz [49]2 years ago
8 0

Answer: Here's your answer: Therefore, the decimal number 0.0020 written in scientific notation is 2 × 10-3 and it has 2 significant figures. Here are some more examples of decimal to scientific notation 0.00200 in scientific notation

Explanation: Pls mark me brainiest pls

Ahat [919]2 years ago
4 0

Answer:

2x10^{-3} (The "x" is the multiplication sign)

Explanation:

A scientific notation is expressed as

10^{n}

When you have decimals, the exponent becomes negative:

10^{-2}=\frac{1}{100}  =0.01

So this is:

2x10^{-3}

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A 59.1 sample of aluminum is put into a calorimeter (see sketch at right) that contains of water. The aluminum sample starts off
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Answer:

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Explanation:

<em>Values: 250g of water, aluminum sample starts off at 91.3°C, water starts off at 16.0°C, temperature of the water stops changing it's 19.5°C</em>

In this problem, the heat produced for the aluminium is the same consumed by water. The heat consumed by water is:

Q = C×m×ΔT <em>(1)</em>

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Replacing:

Q = 4,184J/g°C×250,0g×3,5°C

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Replacing:

3661J / (59,1g×71,8°C) = C

<em>C = 0,863 J/g°C</em>

I hope it helps!

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