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Ann [662]
3 years ago
12

Jacob eats a snack, and then plays basketball with his friends. When he shoots the basketball at the hoop, he is changing _____.

Chemistry
1 answer:
olchik [2.2K]3 years ago
3 0
A because it requires energy from food to move which is mechanical
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Can anybody plz answer
Lelechka [254]

Answer: heat

Other indicators: color change, odor, gas, temperature change.

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3 years ago
What is true of a substance with a lot of mass?
fomenos

Answer:

A. it contains a lot of matter

5 0
3 years ago
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What is the volume of 64 g of oxygen gas 02 at STP
Yakvenalex [24]

Answer:

The volume would be 44.8 L

Explanation:

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8 0
3 years ago
Compare the polymerisation reaction used to produce poly(ethene) with the
butalik [34]

Answer:

See explanation

Explanation:

Polymerization is the process whereby two or more monomers link together to form a compound of high molecular mass called a polymer.

There are two kinds of polymers;

-Addition polymers

-Condensation polymers

Addition polymers are formed by the joining of two or more monomers  to form a polymer without the elimination of a small molecule.

Condensation polymers are formed by the joining of two or more molecules  to form polymers with the elimination of a small molecule.

The main difference between polyethene and polyester is that polyethene is an addition polymer while polyester is a condensation polymer.

In polyethene, ethene molecules are joined together having the repeating unit as [-CH2-CH2-]n.

In polyester, the polymer arises from the reaction of carboxylic acid and an alcohol and loss of water molecules.

5 0
3 years ago
What is the mass of a sample of a substance with a volume of 120 ml and a density of 0.75 g/ml?
Diano4ka-milaya [45]

Answer:

Density=mass / volume.

0.75= mass / 120.

mass= 0.75×120.

mass=90g

8 0
3 years ago
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