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Class 9 Chemistry Fundamentals Of Chemistry


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11.Howmanynumberofmolesareequivalentto8gramsofCo2?(a)0.15(b)0.18(c)0.21(d)0.2411. How many number of moles are equivalent to 8 grams of \mathrm{Co}_{2} ?(a) 0.15 (b) 0.18 (c) 0.21 (d) 0.24

11. How many number of moles are equivalent to 8 grams of \mathrm{Co}_{2} ?(a) 0.15 (b) 0.18 (c) 0.21 (d) 0.24
11. How many number of moles are equivalent to 8 grams of  \mathrm{Co}_{2}  ?(a)  0.15 (b)  0.18 (c)  0.21 (d)  0.24
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11.Howmanynumberofmolesareequivalentto8gramsofCo2?(a)0.15(b)0.18(c)0.21(d)0.2411. How many number of moles are equivalent to 8 grams of \mathrm{Co}_{2} ?(a) 0.15 (b) 0.18 (c) 0.21 (d) 0.24

6 . What will be the mass of 2.05 \times 10^{16} molecules of \mathrm{H}_{2} \mathrm{SO}_{4}
 6 . What will be the mass of  2.05 \times 10^{16}  molecules of  \mathrm{H}_{2} \mathrm{SO}_{4}

6.Whatwillbethemassof2.05×1016moleculesofH2SO4 6 . What will be the mass of 2.05 \times 10^{16} molecules of \mathrm{H}_{2} \mathrm{SO}_{4}

There are 3.01 \times 10^{23} molecules of \mathrm{CO}_{2} present in a container. Calculate the number of moles and its mass.
There are  3.01 \times 10^{23}  molecules of  \mathrm{CO}_{2}  present in a container. Calculate the number of moles and its mass.

Thereare3.01×1023moleculesofCO2presentinacontainer.Calculatethenumberofmolesanditsmass.There are 3.01 \times 10^{23} molecules of \mathrm{CO}_{2} present in a container. Calculate the number of moles and its mass.

3. The most abundant element occurring in the oceans is:(a) oxygen(b) hydrogen (c) nitrogen(d) silicon
3. The most abundant element occurring in the oceans is:(a) oxygen(b) hydrogen (c) nitrogen(d) silicon

3.Themostabundantelementoccurringintheoceansis:(a)oxygen(b)hydrogen(c)nitrogen(d)silicon3. The most abundant element occurring in the oceans is:(a) oxygen(b) hydrogen (c) nitrogen(d) silicon

7 . State three reasons why do you think air is a mixture and water a compound?
 7 . State three reasons why do you think air is a mixture and water a compound?

7.Statethreereasonswhydoyouthinkairisamixtureandwateracompound? 7 . State three reasons why do you think air is a mixture and water a compound?

Calculate the gram molecule (number of moles) in 40 \mathrm{~g} of \mathrm{H}_{3} \mathrm{PO}_{\alpha} .
Calculate the gram molecule (number of moles) in  40 \mathrm{~g}  of  \mathrm{H}_{3} \mathrm{PO}_{\alpha} .

Calculatethegrammolecule(numberofmoles)in40 gofH3POα.Calculate the gram molecule (number of moles) in 40 \mathrm{~g} of \mathrm{H}_{3} \mathrm{PO}_{\alpha} .

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