Home
Class 12
CHEMISTRY
A sample of C(x)O(y) having 3xx10^(19) m...

A sample of `C_(x)O_(y)` having `3xx10^(19)` molecules is weighing `3.4 mg`. Then the value of x and y is respectively …………… `(Take N_(A) = 6xx10^(23))`

A

`1,2`

B

`3,2`

C

`2,2`

D

`5,2`

Text Solution

Verified by Experts

The correct Answer is:
B
A sample of `C_(x)O_(y)` having `3xx10^(18)` …………..
Mass of `N_(A)` molecules (Molar mass)
`= (3.4xx10^(-3))/(3xx10^(19))xx6xx10^(23)`
`= 68 g//mol`
This is satisfied only for `x = 3 and y = 2` .
Promotional Banner

Topper's Solved these Questions

  • TEST PAPERS

    RESONANCE|Exercise PART - III CHEMISTRY SEC - 1|12 Videos

  • TEST PAPERS

    RESONANCE|Exercise PART - III CHEMISTRY SEC - 2|18 Videos

  • SURFACE CHEMISTRY

    RESONANCE|Exercise Section - 5|1 Videos

  • TEST SERIES

    RESONANCE|Exercise CHEMISTRY|50 Videos

Similar Questions

Explore conceptually related problems

If 3(x)/(7)xx2(y)/(5)=10, then the values of x and y respectively,would be

Number of electrons in 36mg of ._8^(18)O^(-2) ions are : (Take N_(A) = 6 xx 10^(23))

Number of electrons present in 3.6 mg of NH_(4)^(+) are : (N_(A) = 6 xx 10^(23))

A sample of MgSO_(4) has 6.023 xx 10^(20)O atoms What is mass of Mg in sample ? .

Complete combustion of 3 g of ethane gives x xx 10^(22) molecules of water. The value of x is _______ . (Round off to the Nearest Integer). [Use : N_A = 6.023xx10^(23) , Atomic masses in u : C : 12.0 , O : 16.0 , H : 1.0]

Suppose two elements X and Y combine to form two compiounds XY_(2) and X_(2)Y_(3) when 0.05 mole of XY_(2) weighs 5g while 3.011xx10^(23) molecules of X_(2)Y_(3) weighs 85g . The atomic masses of X and Y are respectively.

One atom of an element X weighs 6 xx 10^(-23) gm . Number of moles of atoms in 3.6 kg of sample of X will be : (N_(A) = 6 xx 10^(23))