3 years ago

Why is it important to have the International System of Units?

Chemistry

1 answer:

omeli [17]3 years ago

4 0

<span>It can be used by scientists everywhere its important to have the International System of Units.</span>

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Which of the following sets are isoelectronic (i.e., have the same number of electrons)? i. Br-, Kr, Sr2+ ii. C, N-, O2- iii. Mg

il63 [147K]

Answer:

ii. $C,\ N^-,\ O^{2-}$

Explanation:

Isoelectric species are the species which have same number of electrons.

From the given options:-

$C,\ N^-,\ O^{2-}$ are the isoelectric species.

All the three species have same number of electrons which is equal to 6.

Carbon has 6 electrons.

$N^-$ has 6 electrons.

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3 years ago

Which of the following is an example of radiation?

Lapatulllka [165]

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Sauron [17]

Answer:

Explanation:

because 5x5 = 25

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A high speed train travels 176 miles in 7 hours. What is the speed of the train

umka21 [38]

Answer:

25 mph

Explanation:

So we have to find the unit rate, or you could use the DTS triangle, but both say you have to divide, so our equation is:

176 ÷ 7 = 25.14

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So the train is traveling at 25 mph

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3 years ago

A plate moves 200 m in 10,000 years. What is its rate in cm/year?

Varvara68 [4.7K]

Answer:

The answer is

Explanation:

To find the rate in cm/year we must first convert 200 m into cm

1 m = 100 cm

if 1 m = 100 cm

Then 200 m = 200 × 100 = 20 ,000 cm

So the rate is

<u>Reduce the fraction with 10,000</u>

We have the final answer as

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3 years ago