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4 years ago

Explain the energy transformation that must occur for your body to participate in a physical activity, such as playing a sport.

Chemistry

1 answer:

yanalaym [24]4 years ago

3 0

Answer:

an example is an athlete has stored chemical energy in their body like fats and sugars then the stored chemical energy turns into kinetic energy as they run down the track.

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A store sell 21 piece of clothing every 45 minutes.How long will it take the store to sell 100 pieces of clothing?

zmey [24]

Explanation:

21 piece =45 mins

100 pieces= x

on cross multiplication

21x=45×100mins

21x =4500mins

x =4500mins÷21

 =214.3mins or 3.57hrs

3 0

2 years ago

What is the difference between S-32 and S-36?

Blizzard [7]

Answer:

its easy ask to chrome or search in yt ;)

8 0

2 years ago

What do all nickel atoms have in common

Mama L [17]

All nickel atoms would have the same number of protons or atomic number.

4 0

4 years ago

g Nitrogen in the atmosphere consists of two nitrogen atoms covalently bonded together (N2). Knowing that nitrogen is atomic num

vichka [17]

Explanation:

Since, the atomic number of nitrogen is 7 and its electronic distribution is 2, 5. So, in order to attain stability it needs to gain 3 electrons.

Hence, when it chemically combines another nitrogen atom then as both the atoms are non-metals. So, sharing of electrons will take place.

Also, there is no difference in electronegativity of two nitrogen atoms. Hence, compound formed $N_{2}$ is non-polar covalent in nature.

5 0

3 years ago

The pH of a solution is measured as 4.5. What is the hydrogen ion concentration of the solution?

Bond [772]

Answer:

[H⁺] = 3.16 × 10⁻⁵ mol/L

Explanation:

Given data:

pH of solution = 4.5

Hydrogen ion concentration = ?

Solution;

pH = -log [H⁺]

we will rearrange this formula:

[H⁺] = 10∧-pH

[H⁺] = 10⁻⁴°⁵

[H⁺] = 3.16 × 10⁻⁵ mol/L

4 0

3 years ago