Mole Concept and Molar Mass
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306796 Same mass of glucose \(\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)\) and acetic acid \(\left(\mathrm{CH}_{3} \mathrm{COOH}\right)\) contain

1 Same number of carbon atoms
2 Same number of hydrogen atoms
3 Same number of oxygen atoms
4 All of the above
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306798 Analysis of chlorophyll shows that it contains 2.68 percent magnesium. How many atoms of magnesium does 100 g of chlorophyll contain?

1 \({\rm{6}}{\rm{.72 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
2 \({\rm{7}}{\rm{.61 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
3 \({\rm{6}}{\rm{.72 \times 1}}{{\rm{0}}^{{\rm{23}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
4 \({\rm{6}}{\rm{.022 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306800 How many moles of electron weight one kilogram?

1 \(6.023 \times {10^{23}}\)
2 \(\frac{1}{{9.108}} \times {10^{23}}\)
3 \(\frac{{6.203 \times {{10}^{54}}}}{{9.108}}\)
4 \(\frac{1}{{9.108 \times 6.023}} \times {10^8}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306801 The molecular weight of \({{\rm{O}}_{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{and}}{\mkern 1mu} {\mkern 1mu} {\rm{S}}{{\rm{O}}_{\rm{2}}}\) are 32 and 64 respectively. At \({\rm{15^\circ C}}\) and 150 mm Hg pressure, one litre of \({{\rm{O}}_{\rm{2}}}\) contains ‘N’ molecules. The number of molecules in two litres of \({\rm{S}}{{\rm{O}}_{\rm{2}}}\) under the same conditions of temperature and pressure will be :

1 N/2
2 N
3 2N
4 4N
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306796 Same mass of glucose \(\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)\) and acetic acid \(\left(\mathrm{CH}_{3} \mathrm{COOH}\right)\) contain

1 Same number of carbon atoms
2 Same number of hydrogen atoms
3 Same number of oxygen atoms
4 All of the above
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306798 Analysis of chlorophyll shows that it contains 2.68 percent magnesium. How many atoms of magnesium does 100 g of chlorophyll contain?

1 \({\rm{6}}{\rm{.72 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
2 \({\rm{7}}{\rm{.61 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
3 \({\rm{6}}{\rm{.72 \times 1}}{{\rm{0}}^{{\rm{23}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
4 \({\rm{6}}{\rm{.022 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306800 How many moles of electron weight one kilogram?

1 \(6.023 \times {10^{23}}\)
2 \(\frac{1}{{9.108}} \times {10^{23}}\)
3 \(\frac{{6.203 \times {{10}^{54}}}}{{9.108}}\)
4 \(\frac{1}{{9.108 \times 6.023}} \times {10^8}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306801 The molecular weight of \({{\rm{O}}_{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{and}}{\mkern 1mu} {\mkern 1mu} {\rm{S}}{{\rm{O}}_{\rm{2}}}\) are 32 and 64 respectively. At \({\rm{15^\circ C}}\) and 150 mm Hg pressure, one litre of \({{\rm{O}}_{\rm{2}}}\) contains ‘N’ molecules. The number of molecules in two litres of \({\rm{S}}{{\rm{O}}_{\rm{2}}}\) under the same conditions of temperature and pressure will be :

1 N/2
2 N
3 2N
4 4N
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306796 Same mass of glucose \(\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)\) and acetic acid \(\left(\mathrm{CH}_{3} \mathrm{COOH}\right)\) contain

1 Same number of carbon atoms
2 Same number of hydrogen atoms
3 Same number of oxygen atoms
4 All of the above
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306798 Analysis of chlorophyll shows that it contains 2.68 percent magnesium. How many atoms of magnesium does 100 g of chlorophyll contain?

1 \({\rm{6}}{\rm{.72 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
2 \({\rm{7}}{\rm{.61 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
3 \({\rm{6}}{\rm{.72 \times 1}}{{\rm{0}}^{{\rm{23}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
4 \({\rm{6}}{\rm{.022 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306800 How many moles of electron weight one kilogram?

1 \(6.023 \times {10^{23}}\)
2 \(\frac{1}{{9.108}} \times {10^{23}}\)
3 \(\frac{{6.203 \times {{10}^{54}}}}{{9.108}}\)
4 \(\frac{1}{{9.108 \times 6.023}} \times {10^8}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306801 The molecular weight of \({{\rm{O}}_{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{and}}{\mkern 1mu} {\mkern 1mu} {\rm{S}}{{\rm{O}}_{\rm{2}}}\) are 32 and 64 respectively. At \({\rm{15^\circ C}}\) and 150 mm Hg pressure, one litre of \({{\rm{O}}_{\rm{2}}}\) contains ‘N’ molecules. The number of molecules in two litres of \({\rm{S}}{{\rm{O}}_{\rm{2}}}\) under the same conditions of temperature and pressure will be :

1 N/2
2 N
3 2N
4 4N
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CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306796 Same mass of glucose \(\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)\) and acetic acid \(\left(\mathrm{CH}_{3} \mathrm{COOH}\right)\) contain

1 Same number of carbon atoms
2 Same number of hydrogen atoms
3 Same number of oxygen atoms
4 All of the above
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306798 Analysis of chlorophyll shows that it contains 2.68 percent magnesium. How many atoms of magnesium does 100 g of chlorophyll contain?

1 \({\rm{6}}{\rm{.72 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
2 \({\rm{7}}{\rm{.61 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
3 \({\rm{6}}{\rm{.72 \times 1}}{{\rm{0}}^{{\rm{23}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
4 \({\rm{6}}{\rm{.022 \times 1}}{{\rm{0}}^{{\rm{22}}}}{\mkern 1mu} {\mkern 1mu} {\rm{atoms}}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306800 How many moles of electron weight one kilogram?

1 \(6.023 \times {10^{23}}\)
2 \(\frac{1}{{9.108}} \times {10^{23}}\)
3 \(\frac{{6.203 \times {{10}^{54}}}}{{9.108}}\)
4 \(\frac{1}{{9.108 \times 6.023}} \times {10^8}\)
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306801 The molecular weight of \({{\rm{O}}_{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{and}}{\mkern 1mu} {\mkern 1mu} {\rm{S}}{{\rm{O}}_{\rm{2}}}\) are 32 and 64 respectively. At \({\rm{15^\circ C}}\) and 150 mm Hg pressure, one litre of \({{\rm{O}}_{\rm{2}}}\) contains ‘N’ molecules. The number of molecules in two litres of \({\rm{S}}{{\rm{O}}_{\rm{2}}}\) under the same conditions of temperature and pressure will be :

1 N/2
2 N
3 2N
4 4N