State the law of constant proportions.
(N/A) The law of constant proportions states that in a chemical substance,the elements are always present in definite proportions by mass. This means that a pure chemical compound is always made up of the same elements combined together in the same fixed ratio of mass,regardless of the source from which it is obtained or the method of its preparation.
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Similar Questions
Calculate the number of molecules in $90$ grams of water.
Medium
View SolutionOne mole of $H_{2}O$ means:
$(i)$ $18 \text{ g}$ of $H_{2}O$
$(ii)$ $6.022 \times 10^{23}$ molecules of $H_{2}O$
$(iii)$ $180 \text{ g}$ of $H_{2}O$
$(iv)$ $1.8 \text{ g}$ of $H_{2}O$
$(i)$ $18 \text{ g}$ of $H_{2}O$
$(ii)$ $6.022 \times 10^{23}$ molecules of $H_{2}O$
$(iii)$ $180 \text{ g}$ of $H_{2}O$
$(iv)$ $1.8 \text{ g}$ of $H_{2}O$
Medium
View Solution$A$ gas jar contains $1.7 \, g$ of ammonia gas. Calculate the following:
$(i)$ Molar mass of ammonia.
$(ii)$ How many moles of ammonia are present in the gas jar?
$(iii)$ How many molecules of ammonia are present in the sample?
$(i)$ Molar mass of ammonia.
$(ii)$ How many moles of ammonia are present in the gas jar?
$(iii)$ How many molecules of ammonia are present in the sample?
Medium
View SolutionFill in the missing data in the Table.
Species property $H_2O$ $CO_2$ $Na$ atom $MgCl_2$ No. of moles $2$ - - $0.5$ No. of particles - $3.011 \times 10^{23}$ - - Mass $36 \, g$ - $115 \, g$ -
| Species property | $H_2O$ | $CO_2$ | $Na$ atom | $MgCl_2$ |
| No. of moles | $2$ | - | - | $0.5$ |
| No. of particles | - | $3.011 \times 10^{23}$ | - | - |
| Mass | $36 \, g$ | - | $115 \, g$ | - |
Medium
View SolutionThe relative atomic mass of an oxygen atom is $16$. Explain its meaning.
Easy
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