Dpp 1 | Mole (Unit) | Gases

May 13, 2018 | Author: Anonymous | Category: Documents
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How many grams are contained in one mole of calcium phosphate? ... The sample of oxygen at S.T.P. which represents the g...

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TO BE USED AS CLASS WORK DPP

1.The mass in grams of 1.5 moles of hydrogen is 1) 1.0 gram; 2) 2.0 grams; 3) 3.0 grams; ANS: 3

4) 1.5 grams;

5) none of these.

2. Ho many grams are !ontained in one mole of !al!i"m #hos#hate$ 1) %&.0 g. 2) 15'.0 g. 3) 20&.5 g. 4) 2%1.' g. 5) none of these ANS: 5 3. (hat is the mass of !aron in 2.0 moles of s"!rose* +12H22,11$ 1) 24.0 grams 3) 2&& grams 2) 144.0 grams 4) -'.02  1023)-24.0) grams ANS: 3

5) none of these

4. Ho many grams of oygen are there in 300 grams of #otassi"m oide$ 1) 25.5 g. 2) 51.1 g. .3) '%.2 g. 4) &%.1 g. ANS: 2

5) /3.% g.

5. The sam#le of oygen at S.T.. hi!h re#resents the greatest mass is one 1) mole; 2) gram; 3) mole!"le; 4) liter. ANS: 1 '. The mass of a mole of a gas diided y 22.4 liters liters e"als 1) the density of the the gas at ST; 2) the ol"me of the gas; 3) the em#iri!al form"la of the gas; 23 4) the ol"me of '.02  10  mole!"les of the gas. ANS: 1 %. The form"la for one mole!"le of hydrogen is 1) H2; 2) 2 H; 3) 2 H; 4) 2 H; ANS: 1

5) none of these.

&. The form"la +,2 does not gie information ao"t 1) the elements hi!h mae "# the !om#o"nd. 2) the n"mer of atoms of ea!h element in the !om#o"nd. 3) the sol"ility of the !om#o"nd in ater. 4) the relatie mass of the mole!"le. ANS: 3 /. The mole!"lar form"la H2, re#resents all of the folloing except 1) one mole!"le of ater; 2) the relatie n"mer of atoms in a mole!"le; 3) one form"la mass of ater; 4) one gram of ater; 5) one mole of ater. ANS: 4 10. The atomi! mass of 6g is 24* and the atomi! atomi! mass of +l is is 35.5. ,ne mole of 6g+l2 re#resents /5 mole!"les of the !om#o"nd. 3) !ontains 35.5 mole!"les of !hlorine. !hlorine. 2) re#resents /5 grams of the !om#o"nd. 4) !ontains 2 moles of !hlorine mole!"les. ANS: 2 11. 7f to !ontainers of different gases "nder the same !onditions hae the same n"mer of mole!"les* the gases m"st hae 1) an e"al n"mer of atoms; 2) e"al mole!"lar masses; 3) e"al ol"mes; 4) e"al masses. ANS: 3 12.(hat is the mass of 3.4 moles of al"min"m al" min"m hydroide$

1)

1) 15'.4 g. ANS: 3

2) 20%.4 g.

3) 2'5.2 g.

4) 2/4.1 g.

13. Ho many grams are there in 0.&5 moles of iodine$   1) 4& g. 2) 10& g. 3) 12% g. 4) none of these ANS: 4 14. (hat is the mass of one mole of tin -77) fl"oride$ 1) 5/.0 g. 2) '&.0 g. 3) 13& g. ANS: 4

4) 15% g.

5) 12' g.

15. A liter of a !ertain gas eighs 1.25 grams at S.T.. The mass of one mole of this gas is 1) 1.25 g; 2) 22.4 g; 3) eteen 1.25 and 2.0 g; 4) 2& g; 5) 32 g. ANS: 4 1'. (hi!h sam#le !ontains the same n"mer of atoms as 24 grams of !aron$ 1) &0 gram Ar 2) 24 gram 6g 3) 10 gram Ne 4) 4.0 gram He ANS: 1 1%. (hat is the n"mer of moles #resent in &'2 grams of !al!i"m hydrogen s"lfate$ 1) '.3 moles 2) 5.2 moles 3) 3.% moles 4) 4.1 moles 5) none of these ANS: 3 1&. The mass of 1 mole of +aS,4.2H2, is 4) 200 g; 5) 21% g. ANS: 3

1) 11 g;

2) 154 g;

3) 1%2 g;

1/. (hat is the mass of one mole of the gasoline additie lead tetraethyl* -+2H5)4$ 1) 323 g. 2) 251 g. 3) 23' g 4) 150 g. ANS: 1 20. (hat is the a##roimate mass of a mole of !aron tetra!hloride* ++l4$ 1) 1.00 gram 2) 22.4 grams 3) 4%.5 grams 4) &3.5 grams 5) 154 grams ANS: 5 21. 7n one grammole!"lar mass of !o##er -77) s"lfate* the total mass of oygen is 1) 1' grams; 2) 4& grams; 3) '4 grams; 4) 144 grams. ANS: 3 22. Ho many moles are there in %5 grams of !al!i"m$ 1) 1./ moles 2) 2.4 moles 3) 4.2 moles 4) 40 moles ANS: 1

5) none of these

23. Ho many moles are there in 100 grams of the element heli"m$ 1) 12.5 m. 2) 25.0 m. 3) 50.0 m. 4) 100 m. ANS: 2

5) 400 m.

24.Ho many moles of hydrogen !yanide* H+N* are !ontained in /.00 grams of H+N$ 1) 0.0/0 m. 2) 0.333 m. 3) 1.00 m. 4) /.00 m. ANS: 2 2'. Ho many grams are there in 1.5 moles of 8in!$ 1) 15 grams 2) 4% grams 3) '5 grams ANS: 4

4) /& grams

 ASSIGNMENT 1

1. +al!"late the n"mer of moles in 400 grams of mer!"ri! hydroide.   1) 1.%1 moles 2) 1.&4 moles 3) 2.40 moles 4) 3.1 moles ANS: 1 2. Ho many moles are there in '00.0 grams of sodi"m di!hromate$   1) 1.' m. 2) 2.3 m. 3) 3.1 m. 4) 3.% m. 5) none of these ANS: 2 3. The n"mer of moles of sodi"m !hloride re#resented y 11% grams is 1) 1; 2) 2; 3) 3; 4) 3.25; 5) 22.4. ANS: 2 4. Ho many grams are there in 0.' mole of al"min"m !aronate$   1) 52.2 grams 2) &&.2 grams 3) 120.' grams ANS: 4

4) 140.4 grams

5. Ho many grams are there in 0.0& mole of !"#ri! a!etate$ 1) /.& grams 2) 12.2 grams 3) 14.5 grams ANS: 3

4) 14./ grams

'.(hat is the mass of one liter of a!etylene* +2H2* at standard tem#erat"re and #ress"re$ 1) 0./4 g. 2) 1.1' g. 3) 2.4% g. 4) 12.3 g. ANS: 2 %. 9nder standard !onditions* the mass of 22 .4 liters of !aron monoide is 1) 14 grams; 2) 20 grams; 3) 22.5 grams; 4) 2& grams. ANS: 4 &. +al!"late the mass of 25.0 liters of oygen hen the ol"me is meas"red at S.T..   1) 35.% grams 2) 44.& grams 3) 5'.0 grams 4) %2.0 grams 5) none of these ANS: 1 /. +al!"late the mass of 4.0 liters of !aron dioide at S.T.. 1) %./ grams 2) 11.2 grams 3) 1' grams ANS: 1

4) 44.0 grams

10. A liter of a !ertain gas eighs 2.&' grams at S.T.. The mass of one mole of this gas is 1) 2.&' g; 2) more than 2.&' g. "t less than 4 g; 3) 22.4 g; 4) 32 g.; 5) '4 g. ANS: 5 11. (hat is the mass of 50.0 liters of oygen gas* ,2* at S.T.. $ 1) 32.0 grams 2) %1.4 grams 3) 100 grams ANS:2

4) 143 grams

12. At S.T..* hat ol"me does 1.00 gram of hydrogen* H2* o!!"#y$ 1) 1.00 liter 2) 2.&0 liters 3) 5.'0 liters 4) 11.2 liters ANS: 4

5) 22.4 liters

13. 9nder standard !onditions* the mass of o ne liter of a gas ith a mole!"lar mass of 42 is 1) l.&% grams; 2) 10.5 grams; 3) 1'.0 grams; 4) 22.4 grams; 5) 42 grams. ANS: 1 14. At S.T.. !onditions hat ill 112 liters of ammonia* NH3* eigh$   1) 3.4 grams 2) '%.2 grams 3) &5.0 grams 4) 14%.' grams ANS: 3 15. (hat is the ol"me of 32 grams of s"lf"r dioide* S,2* at S.T.. !onditions$ 1) 11.2 liters 2) 22.4 liters 3) 44.& liters 4) /1.4 liters ANS: 1 1'. The ol"me o!!"#ied y 3 moles of oygen at standard tem#erat"re and #ress"re is 1) 1 liter; 2) 22.4 liters; 3) 3 liters; 4) '%.2 liters. ANS: 4 1%. (hat is the ol"me of 0.50 mole of !aron dioide gas* +,2. meas"red at S.T..$ 1) 5.'0 liters 2) 11.2 liters 3) 33.' liters 4) 44.& liters ANS: 2 1&. Ho many moles are #resent hen 340 liters of a gas are at S.T.. !onditions$   1) 0.0% mole 2) 2.1& moles 3) &.0% moles 4) 15.20 moles ANS: 4 1/. A!!ording to Aogadros hy#othesis* the sim#lest molecule of hydrogen !ontains 1) 1 atom; 2) 2 atoms; 3) 22.4 atoms; 4) 32 atoms; 5) '  1023 atoms. ANS: 2 20. Ho many mole!"les are #resent in a '.0 gram sam#le of !aron dioide* +,2$ 1) '.0 2) '.02  1023 3) '  '.02  1023 4)  44.0  44.0 44.0 '.02  1023 ANS: 3 21. There are '.02  1023 ater mole!"les in a mole of ater. (hat is the mass of 3.01  10 23 mole!"les of ater$ 1) 0.50 grams 3) 1&.0 grams 2) /.00 grams 4) 2%.0 grams 5) 3'.0 grams ANS: 2 22. +al!"late the mole!"les #resent in 125 liters of methane at ST !onditions. 1) 1.1  1023 3) 3./  1024 2) 3.3  1024 4) /.2  1024 5) &.%  1023 ANS: 2 23.
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