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Naily [24]
3 years ago
10

1 point

Chemistry
1 answer:
Rina8888 [55]3 years ago
4 0

Answer:

19.39mph

Explanation:

To calculate speed, the formula; distance (d)/time(t) is used.

In this question, a distance of 40yards and a time of 4.22seconds is given. We need to convert the distance to miles and time to hours.

If 3600s = 1 hr

Then 4.22s will be 4.22/3600 hours

= 0.001172hours.

If 1760 yd = 1 mile

Then 40 yd will be 40/1760 miles

= 0.02272miles

Hence, the speed in miles per hour (mph) = 0.02272miles ÷ 0.001172hours

= 0.02272 ÷ 0.001172

= 19.38566

= 19.39

Therefore, the speed of the player is 19.39 miles per hour (mph).

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Answer:

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Explanation:

Just some notes to help you:))

Covalent Bonds: A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons

5 0
3 years ago
How many polar bonds are found in this molecule
Law Incorporation [45]
A bond is non polar if it is between same atoms and polar if it is between different atoms.

Same atoms are like two dogs of same strength pulling a bone towards towards each other. But when it’s different atoms it’s like a big dog and small dog then the bone is more towards bigger dog. So it’s the same way in bonds.

Bonds are made up of electrons, when the more stronger pulling atom is present than other the electrons are more towards it and as a result we have polar bond. There is development of a kind of a negative pole and a positive pole.

The stronger atom has electrons towards itself so it has a little more negative charge while the other atom has positive charge. This makes bond polar.

So just look for bond between two different atoms, it would be polar.

Look at the pic below to see the answer.

Marked with green is bond between same atoms... one carbon and another carbon so it is not polar and test marked with blue are polar.

Well the answer should have been 10 but since the bonds at 3 and 8 are two of same type we count only one of them.


The answer is 8... well the answer should be 10 otherwise... discuss it with ur teacher

6 0
3 years ago
Is it true that Organisms need water, vitamins and minerals. But they do not need salt to function.
Veseljchak [2.6K]
All organisms need water, vitamins, minerals, and salt together to balance things out.
5 0
3 years ago
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mezya [45]

4. Rubidium

I believe :)

4 0
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Eddi Din [679]

Answer:

According to my research A molecule is two or more atoms held together by covalent bonds. An atom is the smallest part of an element. ... A sodium atom has one outer electron, and a carbon atom has four outer electrons.

Explanation:

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