The mass of $1$ atom of hydrogen is ______.

Important Questions on Some Basic Concepts of Chemistry

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Chemistry Crash Course MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 7

Let the molar mass of an element be $\mathrm{A}$ grams. Then, the mass of $10$ atoms of the element in $\mathrm{amu}$ is

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Chemistry Crash Course MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 8

The average mass of one gold atom in a sample of naturally occurring gold is $3.257\times {10}^{-22 }\mathrm{g}$. Use this to calculate the molar mass of gold.

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Chemistry Crash Course MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 9

Which property of an element may have non-integral value?

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Chemistry Crash Course MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 10

The weight of one atom of Uranium is $238$ amu. Its actual weight is_____g.

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Chemistry Crash Course MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 11

Average atomic mass of Magnesium is 24.31 amu. This magnesium is composed of 79 mole $\%$ of  ${}^{24}\mathrm{Mg}$ and remaining 21 mole $\%$ of  ${}^{25}\mathrm{Mg}$ and ${}^{26}\mathrm{Mg}$. Calculate the mole $\%$ of  ${}^{26}\mathrm{Mg}$.

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Chemistry Crash Course MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 12

How many grams are contained in $1$ gram-atom of $\mathrm{Na}$?

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Chemistry Crash Course MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 13

An element has three isotopes with masses of $24, 25$ and $26$ with relative abundance of $80\%, 15\%$ and $5\%$, respectively. The average mass of the isotope mixture would be

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Chemistry Crash Course MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Exercise 1>Q 14

The most abundant elements by mass in the body of a healthy human adult are:
Oxygen$(61.4 \%)$, Carbon$(22.9 \%)$, Hydrogen$(10.0 \%)$ and Nitrogen$(2.6 \%)$. The weight, which a $75 \mathrm{kg}$ person would gain if all ${}^1\mathrm{H}$ atoms are replaced by ${}^2\mathrm{H}$ atoms is,