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3 years ago

Is cutting your hair a physical or chemical change

Chemistry

2 answers:

nalin [4]3 years ago

7 0

Physical because you are physically doing it

Vadim26 [7]3 years ago

7 0

A physical change because you are not changing the chemical composition of your hair. In theory, you could still put that hair back onto your head and it would match the hair still on your head. If it was chemically changed, you would not be able to replace it. Think of wood burning; you can't turn those ashes back to wood, now can you?

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I WILL GIVE U BRAINLIEST

PtichkaEL [24]

Answer:

guidelines

Explanation:

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3 years ago

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An element has an atomic mass number of 16 and an atomic number of 7

Kitty [74]

Answer: Nitrogen

Explanation: Nitrogen has an atomic number of 7 and an atomic mass of about 14 u

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3 years ago

A chemist needs to determine the concentration of a sulfuric acid solution by titration with a standard sodium hydroxide solutio

brilliants [131]

Explanation:

The given data is as follows.

Concentration of standard NaOH solution = 0.1922 M

Let the original acid solution concentration be x.

$M_{1}V_{1} = M_{2}V_{2}$

$x \times 25 = 250 \times M_{2}$

$M_{2} = \frac{x \times 25}{250}$

= 0.1 x M

$V_{2}$ = 10.00 mL (given)

The reaction equation is as follows.

$2NaOH + H_{2}SO_{4} \rightarrow Na_{2}SO_{4} + 2H_{2}O$

Concentration × Volume of $H_{2}SO_{4}$ = Concentration × Volume of NaOH

$\frac{M_{2}V_{2}}{n_{2}} = \frac{M_{3}V_{3}}{n_{3}}$

$\frac{0.1 x \times 10 ml}{1} = \frac{0.1922 M \times 13.68 ml}{2}$

x = 1.314 M

Therefore, we can conclude that the concentration of the original sulfuric acid solution is 1.314 M.

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3 years ago

Why do organisms need to maintain homeostasis

saveliy_v [14]

Here is your answer:

Homeostasis is how organisms keep cool or warm during a hot or cold day! Without homeostasis organisms will freeze or get hot easier which could cause diseases such as skin disease which could cause death if the part of the body gets affected!

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3 years ago

Particles are close to each other but can still slide past each other

scoray [572]

It is True. Hope this helped.

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