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3 years ago

At what velocity (m/s) must a 20.0g object be moving in order to possess a kinetic energy of 1.00J

Chemistry

1 answer:

user100 [1]3 years ago

7 0

Answer:

10 ms-1

Explanation:

Kinetic energy = 1/2 × m × v^2

1 = 1/2× 20 ×10^ -3 × v^2

v ^ 2 = 100

v = 10 ms-1

note : convert grams in to kg before substitution as above

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3 years ago

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<u>Answer:</u> The temperature of the system will be 1622 K

<u>Explanation:</u>

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where,

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3 years ago

the formula of calcium oxide is CaO. What is the formula of the ionic compound containing calium abd sulfate ions

sineoko [7]

Answer:

$CaS$

Explanation:

Hello!

In this case, since calcium's oxidation state when forming ionic bonds is +2 and sulfur's oxidation state when bonding those bonds is -2, for the required formula we write:

$Ca^{2+}S^{2-}$

Now, since they have the same charge number, we infer the ionic compound formed when they bond is calcium sulfide:

$CaS$

Best regards!

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2 years ago