Additional important questions — task. Science State Board, Class 10.

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1.

The isotope of \(C-12\) contains

\(12\) neutrons and no protons.
\(6\) protons and \(7\) electrons.
\(6\) protons and \(6\) neutrons.
\(12\) protons and no neutrons.

2.

The volume occupied by \(3\) moles of \(HCl\) gas at STP is

\(67.2\) \(L\)
\(22.4\) \(L\)
\(44.8\) \(L\)
\(2.24\) \(L\)

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