praptibaral70

28.08.2019 • 

Chemistry

Afixed, single pulley that is used to lift a block does which one of the following?
a.
doubles the force required to lift the block
b.
decreases the force required to lift the block
c.
makes the block easier to lift by changing the direction of the force needed to lift it
d.
decreases the force required and changes the direction of the force required

Ответ:

emacwhaleng

01.01.2022

Chemistry

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The answer is C, it makes the block easier to lift by changing the direction of the force needed to lift it 

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Ответ:

hananbarakat

12.09.2022

Chemistry

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NaN₃(s) → Na(l) + N₂(g).

Explanation:

An electrical impulse causes the sodium azide to decompose, producing elemental sodium and nitrogen gas according to the balanced equation:

NaN₃(s) → Na(l) + N₂(g).

It is clear that 1.0 mole of NaN₃(s) is decomposed to produce 1.0 mole of Na(l) and 1.0 mole of N₂(g).

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