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Chemistry-

General

Easy

Question

The ionization potential hydrogen atom is $13.6 blank e V$ . The energy required to remove an electron in the $n equals 2$ state of the hydrogen atom is

$3.4 e V$
$6.8 e V$
$13.6 e V$
$27.2 e V$

The correct answer is: $3.4 blank e V$

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In nuclear reaction, $blank subscript 3 end subscript superscript 7 end superscript L i plus blank subscript 1 end subscript superscript 1 end superscript H rightwards arrow 2 blank subscript 2 end subscript superscript 4 end superscript H e$ The mass loss is nearly 0.02 amu. Hence, the energy released (in units of million kcal/mol) in the process is approximately

In nuclear reaction, $blank subscript 3 end subscript superscript 7 end superscript L i plus blank subscript 1 end subscript superscript 1 end superscript H rightwards arrow 2 blank subscript 2 end subscript superscript 4 end superscript H e$ The mass loss is nearly 0.02 amu. Hence, the energy released (in units of million kcal/mol) in the process is approximately

Chemistry-General

There are $0.618 blank mu g blank$ of $blank to the power of 206 end exponent P b$ and $0.238 blank mu g blank$ of $blank to the power of 238 end exponent U$ in a rock. If $T subscript 50 end subscript$ of $blank to the power of 238 end exponent U$ is $1.5 cross times 10 to the power of 9 end exponent y r comma$ age of the rock is

There are $0.618 blank mu g blank$ of $blank to the power of 206 end exponent P b$ and $0.238 blank mu g blank$ of $blank to the power of 238 end exponent U$ in a rock. If $T subscript 50 end subscript$ of $blank to the power of 238 end exponent U$ is $1.5 cross times 10 to the power of 9 end exponent y r comma$ age of the rock is

Chemistry-General

The latus-rectum of the hyperbola $16 x to the power of 2 end exponent minus 9 y to the power of 2 end exponent equals$ $144$ , is

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parallel

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