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{:(" Column X "," Column Y "),("a. 40 ...

`{:(" Column X "," Column Y "),("a. 40 g of He " ," i." 6.022xx10^(23)"atoms"),("b. 35 g of Li " ," ii. 10 atoms "),("c. 40 u of He "," iii." 6.022xx10^(24)"atoms" ),("d. 16 g of "O_(2) ," iv." 3.011xx10^(24) "atoms"):}`

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The correct Answer is:
a.(iii), b.(iv), c.(ii), d.(ii)
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Calculate the mass of 3.011 xx 10^(24) atoms of carbon.

Match the following {:("(i)","88 g of CO"_(2),"(a)","0.25 mol"),("(ii)",6.022 xx 10^(23)" molecules of "H_(2)O,"(b)","2 mol"),("(iii)","5.6 litres of O"_(2)" at STP","(c)","1 mol"),("(iv)","96 g of O"_(2),"(d)",6.022xx10^(23)"molecules"),("(v)","1 mole of any gas","(e)","3 mol"):}

Determine the mass of the following : (i) 6.022 xx 10^(23) number of O_(2) molecules (ii) 6.022 xx 10^(23) number of O atoms .