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Vladimir [108]
3 years ago
11

What r some important things in this paragraph ????

Chemistry
2 answers:
Semenov [28]3 years ago
6 0

Keeping your arm straight in front of you, you rotate 90° to your left, and see the left side of the circle lit while the right side is dark. Half the ball is still lit up, but you can see only part of the lit area. As you continue to rotate, you see a different amount of the ball.

stich3 [128]3 years ago
3 0
You can explain how the moon changes in a pattern using models. Suppose you were standing in the dark room with a bare light bulb behind you. You hold a ball in front of you, and you can see all of the lit half of the ball, which looks like a circle. Keeping your arm straight in front of you, you rotate 90° to your left, and see the left side of the circle lit while the right side is dark. In fact, you would see the shape change from a full circle to a crescent shape to a backwards crescent shape and then back to a full circle.

Try this :)
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The volume of a gas is reduced from 4 L to 0.5 L while the temperature is held constant. How does the gas pressure change?
liberstina [14]

Answer:

It increases by a factor of eight

Explanation:

When temperature is held constant, gas pressure changes according the volume, in undirectly proportion.

Volume increases →  Pressure decreases

Volume decreases → Pressure increases

As volume gas, was reducted from 4L to 0.5L, it was reduced by 1/8, so the pressure gas was increased by a factor of eight.

5 0
3 years ago
Which contains more atoms, 10. 00 g of aluminum or 10. 00 g of lead? Can you explain without using mathematical conversions?.
Aleks04 [339]

Explanation:

divide the weight in grams by the atomic mass from the periodic table, then multiply the result by Avogadro's number..

Hope this works!!

7 0
3 years ago
Calculate the percent by mass of each element in
Ronch [10]

Answer:

See below in bold.

Explanation:

Nitrogen, Hydrogen and Oxygen are the elements present in ammonium nitrate.

The Molar Mass =  2N + 4H  + 3 O

= 2*14.007 + 4*1.008 + 3*15.999

= 80.043.

Percentage of Nitrogen = (2 * 14.007) * 100 / 80.043

= 35.00 %.

Percentage of Hydrogen = (4* 1.008) * 100 / 80.043

= 5.04%.

Percentage of Oxygen = (3 * 15.999) * 100 / 80.043

= 59.96 %.

6 0
3 years ago
Read 2 more answers
Select the correct answer.<br> Which atom or lon is the largest?
icang [17]

Answer:urenium

Explanation: because his atomic number is 235

8 0
3 years ago
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Please explain all the three laws of motion please ​
tatyana61 [14]

Answer:

Newton's First Law of Motion: Any object remains in the state of rest or in uniform motion along a straight line, until it is compelled to change the state by applying external force.

Newton's Second Law of Motion: The rate of change of momentum is directly proportional to the force applied in the direction of force.

Newton's Third Law of Motion: There is an equal and opposite reaction for evrey action

6 0
3 years ago
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