Home
Class 12
CHEMISTRY
Calculate the following for 49 gm of H(2...

Calculate the following for 49 gm of `H_(2)SO_(4)`
(a) moles `" "`(b) Molecules
(c) Total H atoms`" "`(d)Total O atoms
(e) Total electrons

Text Solution

Verified by Experts

Molecular wt of `H_(2)SO_(4)=98`
(a) moles `="wt in gm"/"molecular wt"=49/98=1/2` mole
(b) Since 1 mole `=6.023 times 10^(23)` molecules.
`1/2` mole `=6.023 times 10^(23) times 1/2` molecules
`=3.011 times 10^(23)` molecules
(c) 1 molecule of `H_(2)SO_(4)` contains 2 H atom
`3.011 times 10^(23) " of "H_(2)SO_(4) " contain "2 times 3.011 times 10^(23)`
atoms `=6.023 times 10^(23)` atoms
(d) 1 molecules of `H_(2)SO_(4)` contain 4 O atoms
`3.011 times 10^(23) " molecules of " H_(2)SO_(4)` contains
`=4 times 3.011 times 10^(23)=12.044 times 10^(23)`
(e) 1 molecules of `H_(2)SO_(4)` contains 2H atoms + 1 S atoms + 4 O atom
this means 1 molecule of `H_(2)SO_(4)` Contains
`(2+16+4 times 8)e^(-)`
So `3.011 times 10^(23)` molecules have
`3.011 times 10^(23) times 50` electrons `=1.5055 times 10^(25)e^(-)`
Promotional Banner

Topper's Solved these Questions

  • MOLE CONCEPT

    MOTION|Exercise EXERCISE - 1|64 Videos

  • MOLE CONCEPT

    MOTION|Exercise EXERCISE - 2 (LEVEL - I)|50 Videos

  • METALLURGY

    MOTION|Exercise EXERCISE 4 (LEVEL - II)|17 Videos

  • NOMENCLATURE OF ORGANIC COMPOUNDS

    MOTION|Exercise PREVIOUS YEAR|8 Videos

Similar Questions

Explore conceptually related problems

Calculate the total number of atoms present in 0.49 grams of H_(2)SO_(4) .

Calculate the total number of atoms in 5.6 L of SO_(2) as at 0^(@)C and 1 atm :-

A neutral atom of an element has 2 k , 8L, 8L, 9M and 2N electrons . Find out the following : (a) Atomic no. (b ) total no. of s-electrons , (c ) total no. of s-electrons , (d) total no. of s-electrons , (e ) Valency of element . (f) No, of unpaired elecrons) .

The integral enthalpy of solution in kJ of one mole of H_(2)SO_(4) dissolved in n mole of water is given by : DeltaH_(s)=(75.6xxn)/(n+1.8) Calculate DeltaH for the following processes : (a) 1 mole of H_(2)SO_(4) dissolved in 2 mole of H_(2)O . (b) 1 mole of H_(2)SO_(4) dissolved in 7 mole of H_(2)O . (c ) 1 mole of H_(2)SO_(4) dissolved in 5 mole of H_(2)O . (d) solution (a) dissolved in 5 mole of H_(2)O . (e) 1 mole of H_(2)SO_(4) dissolved in excess of H_(2)O .

Calculate the total number of electrons in 1 mole of ammonia.

The total energy of the electron in atom is

Find the number of properties which are changed for the CH_(3)^(o+)rarrCH_(3)^(Theta) (a) Hybridisation (b) Bond angle (c) Shape of ions (d) Total number of electrons (e) Total number of atoms present in an ion

The number of carbon atoms in exactly 12 g C^(12) is called Avogadro's number , N_(A) (6.022 xx 10^(23)) . One mole is the amount of material which contains Avogradro's number of particle. These definitions emphasize that the mole refers to a fixed number of NA^(+) b Avogadro's number of atoms , electrons to refer to a mole of helium , a mole of electrons , or a mole of NA^(+) by Avogadro's number of atoms, electrons or ions respectively. On the other hand, phrases like "one mole of hydrogen" can be ambiguous , and should be restated as "one mole of hydroden atoms" or " one mole fo hydrogen molecules." But it is a matter of common practice among chemists , however , to let the name of the element stand for its mos common form. Thus one mole of O_(2) is frequently referred to as one mole of oxygen , whereas one moles of O is called one mole of oxygen atoms. Suppose if we take one mole molecules fo H_(2)SO_(4) then it contain 2 moles of H atom 1 mole of S atom and 4 moles of O atom. It can also be said that moles of oxygen molecules is (4)/(2) =2 mole. If a sample of CuSO_(4).5H_(2)O contains 3 moles of oxygen molecules , then fo H-atom present in the sample is :