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2 years ago

Please helpp!! I give brainliest!

Chemistry

2 answers:

guajiro [1.7K]2 years ago

8 0

Answer:

Volume is cut in half

Explanation:

• From boyles gas law

${ \rm{P \: \alpha \: \frac{1}{V} }} \\ \\ { \rm{P _{1}V _{1} = P_{2}V _{2} }}$

P is pressure
V is volume

${ \rm{(1 \times V _{1}) = (2 \times V _{2})}} \\ \\ { \rm{ \frac{V _{2}}{V_{1}} = \frac{1}{2} }} \\ \\ { \boxed{ \rm{V_{2} : V _{1} = \frac{1}{2} }}}$

ANEK [815]2 years ago

4 0

Answer:

just because of the air

Explanation:

big / the answer is volume stays the same

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What is the empirical formula of a compound that is made of 3.80g of phosphorus and 0.371g of hydrogen?

lys-0071 [83]

You start by diving each quantity given by the atomic wight of each element:

Phosphorus (P) $\frac{3.8}{31} =0.123$

Hydrogen (H) $\frac{0.371}{1} =0.371$

Then you divide by the lowest number:

$\frac{0.123}{0.123} = 1$ for phosphorus

$\frac{0.371}{0.123} = 3$ for hydrogen

So the empirical formula will be:

$PH_{3}$

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2 years ago

Describe the particles of a solid, liquid, and gas. For each, be sure to tell how far apart they are and how fast or slowly they

Art [367]

Answer:

Solid

A solid is a state of matter where the particles are tightly packed together, they are very close together

They vibrate, they move very slowly

Liquid

A liquid has free-flowing particles, but they may not leave the container
They move at medium speed

Gas

A gas moves very freely, they leave the container, and they may not be captured in its entirety
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Hope this helps :)

- jp524

3 0

1 year ago

A machine has a mechanical advantage of 0.6. What force should be applied to the machine to make it apply 600 N to an object?

Vinil7 [7]

Answer:

1000N is needed to be applied.

Explanation:

Machines make doing work easier. They allow us use small effort to carry out work on huge amount of load.

The mechanical advantage of a machine;

(M.A) =load/effort

M.A = 0.6

Load =600N

effort =?

0.6 = 600/effort

effort = 600/0.6

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2 years ago

I AM GIVING A LOT OF POINTS SO PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

prohojiy [21]

Answer:c

Explanation:

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2 years ago

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Why can you change physical properties and not make a new substance but can't change chemical properties and stay the same?

maxonik [38]

Answer:

Well this has a good chance of being wrong but i wanna say,

When you change a physical property of something it doesn't affect the chemicals that make it up. Like Ice, you can freeze water to make ice. You change a physical property (state of matter) but it's chemical properties don't change because in the end it's still water.

However if you remove a chemical property from something you are changing what made the new substance with will also change the substance along with it.

That's just what I think though

Explanation:

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2 years ago