(B) $(i)$ $5$ moles of $CO_{2} = 5 \text{ mol} \times \text{molar mass of } CO_{2}$$= 5 \text{ mol} \times 44 \text{ g/mol} = 220 \text{ g}$$(ii)$ $5$

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(B) $(i)$ $5$ moles of $CO_{2} = 5 \text{ mol} \times \text{molar mass of } CO_{2}$$= 5 \text{ mol} \times 44 \text{ g/mol} = 220 \text{ g}$$(ii)$ $5$ moles of $H_{2}O = 5 \text{ mol} \times \text{molar mass of } H_{2}O$$= 5 \text{ mol} \times 18 \text{ g/mol} = 90 \text{ g}$Thus,it can be seen that both have different masses.

Class 9 Science ATOMS AND MOLECULES Mix Example - ATOMS AND MOLECULES

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Do $5$ moles of $CO_{2}$ and $5$ moles of $H_{2}O$ have the same mass?

A
Yes,they have the same mass.
B
No,they have different masses.
C
Cannot be determined.
D
They have zero mass.

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Mix Example - ATOMS AND MOLECULES

Write the molecular formulae of all the compounds that can be formed by the combination of the following ions: $Cu^{2+}, Na^{+}, Fe^{3+}, Cl^{-}, SO_{4}^{2-}, PO_{4}^{3-}$.

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$(a)$ What is the law of constant proportions? Explain with the help of an example.
$(b)$ Which postulate of Dalton's atomic theory is in agreement with this law?

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What is meant by atomicity? How many different types of molecules are known on the basis of atomicity?

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Which of the following has the maximum number of atoms?

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$A$ molecule can be defined as the

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Do $5$ moles of $CO_{2}$ and $5$ moles of $H_{2}O$ have the same mass?

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Write the molecular formulae of all the compounds that can be formed by the combination of the following ions: $Cu^{2+}, Na^{+}, Fe^{3+}, Cl^{-}, SO_{4}^{2-}, PO_{4}^{3-}$.

$(a)$ What is the law of constant proportions? Explain with the help of an example.$(b)$ Which postulate of Dalton's atomic theory is in agreement with this law?

What is meant by atomicity? How many different types of molecules are known on the basis of atomicity?

Which of the following has the maximum number of atoms?

$A$ molecule can be defined as the

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$(a)$ What is the law of constant proportions? Explain with the help of an example.
$(b)$ Which postulate of Dalton's atomic theory is in agreement with this law?