Question

find the mass of 2 moles of Oxygen gas 1.5 mole of water and 3 moles of neon 5 moles of sodium 2 moles of Nitrogen element

Answer 1

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$= > no \: of \: moles \: = \frac{given \: mass}{ \: molar \: mss} \\ \\ = > mass \: = \: moles \: \: \times molar \: mass$

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⏩. Mol. Mass of Oxygen gas = 32 g

⏩. Molar mass of Water = 18 g

⏩. Molar mass of Nitrogen element = 14 g

⏩. Molar mass of sodium element => 23 g

⏩. Molar mass of neon gas => 20 g

Given mass = no. Of moles x molar mass

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< ❤️ > Mass of 2 moles of O2 gas

=> 2 × 32 = 64g

< ❤️ > Mass of 1.5 moles of H2O

=> 1.5 × 18 = 9g

< ❤ > Mass of 3 moles of Neos gas

=> 3 × 20 => 60g

< ❤️ > Mass of 5moles of sodium

=> 5 × 23 = 26g

< ❤️ > Mass of 2moles of nitrogen element

=> 2×14 = 28g

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Jai bajarang bali

@Dr S.M.

Answer 2

heya..!

weight of 1 mole oxygen(molecule)= 32 gm.
weight of 1 mole water = 18gm
weight of 1 mole neon= 20gm
weight of 1 mole sodium = 23gm
weight of 1 mole nitrogen(element) = 14 gm.

lets count according to moles mentioned in question.

32×2+ 18×1.5 +20×3 + 23×5 +14×2

64gm (oxygen)+ 27gm (water)+ 60gm (neon)+ 115gm (sodium)+ 28gm (nitrogen)

294 gms.

TOTAL WEIGHT= 294 gms.

HOPE THIS HELPS YOU ❤
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