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Vesna [10]
3 years ago
8

Stone tools enabled people to hunt and grow crops made the food supply more

Chemistry
1 answer:
Nastasia [14]3 years ago
3 0
It makes it more accessible to everybody
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What are the laws of Newton?
Tanzania [10]

Answer:

an object that is at rest will stay at rest inless a force acts upon it.

An oject that is in motion will not change its velocity unless a force acts upon it.

4 0
3 years ago
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Which part of the Periodic Table of the elements is used to identify valence electrons? *
irina1246 [14]
The number of valence electrons of an element can be determined by the periodic table group (vertical column) in which the element is categorized
6 0
2 years ago
In the balanced chemical reaction for the combustion of acetylene (used in welding torches), determine at standard temperature a
Tpy6a [65]

Answer:

8L of CO2

Explanation:

The equation for the reaction is given below:

2C2H2 + 5O2 —> 4CO2 + 2H2O

From the equation above,

5L of O2 produced 4L of CO2.

Therefore, 10L of O2 will produce = (10 x 4)/5 = 8L of CO2

Therefore, 8L of CO2 is produce

8 0
3 years ago
Find the ratio of the effusion rate of hydrogen gas to the effusion rate of krypton gas.
Zielflug [23.3K]

This problem could be solved through the Graham’s law of effusion (also known as law of diffusion). This law states that the ratio of the effusion rate of the first gas and effusion rate of the second gas is equivalent to the square root of the ratio of its molar mass. Thus the answer would be 0.1098. 

6 0
3 years ago
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Which of the following is a chemical property of a sheet of paper?
Tomtit [17]

Answer:

A

Explanation:

Flammability is a chemical property. The paper crumbling would be a physical property. The inability to attract a magnet or conduct electricity would be considered electrical properties

3 0
3 years ago
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