4 years ago

Their respective charges are?

1 answer:

4 0

The atom that has atomic mass of 12 has ___6____________ protons. The valence electron(s) is/are the outer most electron(s) in an atom. In an atom, the electrons form a cloud around the nucleus. Objects that are electrically neutral become negatively charged when they gain electrons.

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How many mL of a stock 50% (w/v) KNO3 solution are needed to prepare 250 mL of a 20% (w/v) KNO3 solution?

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Answer:

100ml of a stock 50% KNO3 solutions are needed to prepare 250ml of a 20% KNO3 solution.

Explanation:

In the given question it is mentioned that

S1=50%

V2=250ml

S2= 20%

We all know that

V1S1=V2S2

∴V1= V2×S2÷S1

∴V1= V2S2×1/S1

∴V1= 250×20÷50

∴V1= 100ml

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Valence.

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3 years ago

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B. They are clones of the parent plant

Explanation:

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3 years ago

A certain food web is made up of turtles, pond weeds, water fleas, and tadpoles. Which organism is most likely the producer in t

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