2 years ago

Protons and neutrons are composed of what? A electrons B.quarks C.ions D.molecules

Chemistry

2 answers:

leonid [27]2 years ago

6 0

B. Quarks is the answer.

drek231 [11]2 years ago

3 0

Protons and neutrons are made up of quarks.

B.

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Answer:

2 moles of Sn are produced when 4 moles of H2(g) are consumed completely

Explanation:

to determine the number of moles of sn (l) produced when 4.0 moles of H2 (g) is consumed completely.

First, find the number of moles of H2 consumed by taking this as limiting reagent.

$n = \frac{g}{M.W (g/mol)}$

Then find the moles of Sn (l) taking into account the stoichiometric relationship between H2(g) and Sn(l). 2:1

$SnO_{2}$ (s) + 2 $H_{2}$ (g) ⇒ Sn(l) + 2 $H_{2}O$ (g)

$mol Sn(l) = \frac{1mol Sn}{2mol H_{2} } . 4 mol H_{2} = 2 mol$

∴2 moles of Sn are produced when 4 moles of H2(g) are consumed completely.

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2 years ago

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Vladimir79 [104]

A True

Each element consists of one type of atom but, not contains only one atom. It has same type of atoms present in it.

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NaHCO3 is the right answer

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