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miss Akunina [59]
3 years ago
15

Scientific laws commonly answer which questions about the world?

Chemistry
1 answer:
borishaifa [10]3 years ago
4 0

Answer:

How

Explanation: In science a person has to be curious on how things work. Key word how. Why makes sense but how is the better answer. How many is a specific question. But it doesn't involve the whole spectrum of science. What also doesn't make sense.

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In Period 2, as the elements are considered from left to
Elza [17]

Answer:

it will option B ,hope it helps

5 0
3 years ago
7. A gas has a volume of 300 mL at 300 mm Hg. What will its volume be if the pressure is changed to 500 mm Hg?​
USPshnik [31]

Answer:

The volume is

<h2>180 mL</h2>

Explanation:

In order to solve for the volume we use the formula for Boyle's law which is

<h3>P _{1}  V _{1} = P _{2}V _{2}</h3>

where

P1 is the initial pressure

V1 is the initial volume

P2 is the final pressure

V2 is the final volume

Since we are finding the final volume we are finding V2

Making V2 the subject we have

<h3>V _{2}  = \frac{P _{1}  V _{1}}{P _{2}  }</h3>

From the question

P1 = 300 mmHg

V1 = 300 mL

P2 = 500 mmHg

Substitute the values into the above formula and solve for the final volume obtained

That's

<h3>V _{2} =  \frac{300 \times 300}{500}  \\  =  \frac{90000}{500}  \\  =  \frac{900}{5}</h3>

We have the final answer as

<h3>180 mL</h3>

Hope this helps you

7 0
4 years ago
(7) need help asappp plss
natima [27]

Answer:

See explanation

Explanation:

The cold drink chiller is a cold substance which is inserted into a bottle of drink which contains warm liquid particles at a particular temperature.

Once the drink chiller is inserted, the liquid molecules around the drink chiller become cooler, denser and sink away from the drink chiller. Other warmer, less dense molecules of the liquid drink now replaces them around the drink chiller.

A convection current is thus set up for as long as the drink chiller is working.

3 0
3 years ago
Calculate the number of copper atoms in a penny.
Grace [21]
Since a mole of atoms contains 6.0221 x 1023 atoms, there are 2.2452 x 1022 zinc atoms and 5.9230 x 1020 copper atoms in a penny, for a total of 2.3044 x 1022 atoms in a penny. Public Domain Image, source: NASA/JPL-Caltech
3 0
3 years ago
The reaction below shows how the potential energy changes during a
pochemuha

The change in enthalpy shows on the graph is the red arrow shows that enthalpy is positive, indicating an endothermic reaction.

<h3>What is potential energy?</h3>

Energy is the basic thing to do any reaction or any process. There are many kinds of energy are present that are use indifferent processes.

Potential energy is the energy that is saved to do a work, or the energy that is present before a work occurred.

The graph is attaches below.

Thus, the correct option is A. The red arrow shows that enthalpy is positive, indicating an endothermic reaction.

Learn more about potential energy

brainly.com/question/24284560

#SPJ1

4 0
2 years ago
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