Which sample contains the most (or a given number of) atoms or molecules

1. A.
   $4.25\text{ g NH}_3$
2. B.
   $1.8\text{ g H}_2\text{O}$
3. C.
   $2.8\text{ g N}_2$
4. D.
   $4.4\text{ g CO}_2$

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1. A.
   $0.4$ g $\mathrm{H_2}$ gas
2. B.
   $3.2$ g of $\mathrm{O_2}$ gas
3. C.
   $16.8\ \mathrm{dm^3}$ of $\mathrm{H_2}$ gas at STP
4. D.
   $11.2\ \mathrm{dm^3}$ of $\mathrm{O_2}$ gas at STP

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1. A.
   $14$ g of $\mathrm{N_2}$
2. B.
   $18$ g of $\mathrm{H_2O}$
3. C.
   $16$ g of $\mathrm{CO}$
4. D.
   $28$ g of $\mathrm{N_2}$

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1. A.
   $14.0$ g of Carbon dioxide.
2. B.
   $2.0$ g of dihydrogen
3. C.
   $12.0$ g of Chromium
4. D.
   $35.5$ g of chlorine gas

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1. A.
   $18$ mL of water
2. B.
   $10^{-3}$ mol of water
3. C.
   $0.18$ g of water
4. D.
   $0.00224$ L of water vapour at $1$ atmp. and $273$K

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1. A.
   $18$ grams of water
2. B.
   $24$ grams of dioxygen
3. C.
   $22$ grams of carbon dioxide
4. D.
   $16$ grams of methane

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