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4 years ago

What is hair made out of and how does it grow ? lol yah ik its kind of a stupid question

Chemistry

1 answer:

Rasek [7]4 years ago

3 0

Hair is dead skin cells that pile on top of each other to "grow".

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density is a physical property. would a change in the density of a sample mean that the sample has undergone a physical or chemi

shepuryov [24]

Answer:

Physical

Explanation:

The change of density alone is a physical change, but there might be some chemical change that results in physical change. For example: Burning a piece of paper will definitely change the density of the paper as some of its content is being changed into smoke which is a gas. So there will be a change in volume which in turn leads to change in density. Therefore, the change of density alone is a physical change, but the change might occur due to another chemical change.

#Please mark my answer as brainliest#

5 0

3 years ago

Estimate the percent ionic character of the co bond. (note that the electronegativity of c is 2.5 and that of o is 3.5.)

deff fn [24]

From the calcuation, the percent ionic character of the bond is 70%

<h3>What is percent ionic character?</h3>

The term percent ionic character has to do with the degree of ionic bonding that is contained in a compound. It can be estimated from the electronegativity of each element.

We can use the formula; 100(1 - e^(-ΔEN² / 4))

EN = χB − χA * 100/1

EN = 3.5 - 1.5 = 1

100(1 - e^(-1)^2/4)

= 70%

Learn more about percent ionic character:brainly.com/question/7034446

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5 0

2 years ago

Is this statement true or false?

r-ruslan [8.4K]

True. Living things are classified by the characteristics they have in common.

All living organisms are classified within the organization based on extremely fundamental, shared characteristics.The classification of organisms is called taxonomy.

5 0

3 years ago

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Difference between chemical properties of metals and non metals.

Vilka [71]

Answer:Chemical Properties: Non-metals generally have somewhere around 4 to 8 electrons in the outer shell. Non-metals tend to gain or accept valence electrons. When they are exposed to oxygen, non-metals react with oxygen to form acidic oxides.

Explanation:

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3 0

3 years ago

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Atmospheric pressure at the summit of mount everest is about one third the pressure at sea level, which is 760 mm hg. if oxygen

vichka [17]

Atmospheric pressure at sea level is 760 mmHg.
We have been told that at the summit the pressure is only one third the pressure at sea level.
Then the pressure at the mountain top is $\frac{760}{3}$ mmHg
Air is made of a mixture of gases. the pressure that each gas exerts individually contributes to the total pressure of the system. The pressure that each gas exerts is the partial pressure of that gas which depends on the mole fraction of that gas or percentage composition of the individual gas.
Partial pressure of Oxygen - total pressure x percentage composition
Therefore pO₂ - $\frac{760 * 0.21}{3}$ = 53.2 mmHg
Answer is 53 mmHg

6 0

4 years ago

Read 2 more answers