3 years ago

16. Keesha performed a chemical reaction, and the products looked quite

Chemistry

1 answer:

alisha [4.7K]3 years ago

8 0

Answer:

it's the third one

Explanation:

matter can't change, but mass can differ

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Which salt is produced when sulfuric acid and calcium hydroxide react completely?

AnnyKZ [126]

Answer: Option (4) is the correct answer.

Explanation:

When sulfuric acid reacts with calcium hydroxide then it results in the formation of calcium sulfate and water.

The chemical reaction for the same will be as follows.

$H_{2}SO_{4} + Ca(OH)_{2} \rightarrow CaSO_{4} + 2H_{2}O$

Thus, we can conclude that $CaSO_{4}$ salt is produced when sulfuric acid and calcium hydroxide react completely.

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Answer:

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krek1111 [17]

KE=3070.625 J

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<h3>Further explanation</h3>

mass of bike+rider=85 kg

velocity = 8.5 m/s

$\tt KE=\dfrac{1}{2}mv^2\\\\KE=\dfrac{1}{2}\times 85\times 8.5^2\\\\KE=3070.625~J$

Conservation of energy :

(KE+PE)₁ (downhill) = (KE+PE)₂ (up the hill)

PE₁=0⇒h=0

KE₂=0⇒v=0(stop), so equation becomes :

KE₁=PE₂

$\tt KE_1=3070.625\\\\KE_1=mgh_2\\\\3070.625=85\times 9.8\times h\Rightarrow h=3.686~m$

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