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Vladimir [108]
3 years ago
13

How much heat energy is required to raise the temperature of 5 kilograms of coal from 20°C to 220°C?

Chemistry
1 answer:
puteri [66]3 years ago
8 0
I think it is 240 joules
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7 0
3 years ago
Calculate the mass of 20.0 moles of He (in g)
Daniel [21]

Explanation:

20.0 moles= 80.1 or 80.05g

5.00 moles= 20.0g

1.20×1025moles= 4923.2g

1.00 moles= 4.00g

80.0 moles= 320.2g

7 0
3 years ago
Behind your house, there's a gorgeous pond filled with frogs. You notice that the frogs behind Mr. Archer's house often have thr
borishaifa [10]

Answer:

Group B is the control group

Explanation:

In an experiment, a control group is the standard to which comparisons are made in an experiment.

4 0
3 years ago
What type of bond is joining the two hydrogen atoms?
Julli [10]
Bonding between 2 hydrogen atoms is 'covalent bond'.

Hope this helps you.
7 0
4 years ago
Where is the moon located in relation to Earth and the sun when it is a first-quarter moon?
dangina [55]
At first quarter and last quarter, the Moon lies perpendicular to a line between Earth and the Sun. We see exactly half of the Moon illuminated by the Sun — the other half lies in shadow. Hope it helps :)
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