Home
Class 11
CHEMISTRY
Caffeine has a molecular weight of 194. ...

Caffeine has a molecular weight of 194. If it contains 28.9 % by mass of nitrogen, number of atoms of nitrogen in one molecule of caffeine is

A

2

B

3

C

4

D

5

Text Solution

Verified by Experts

The correct Answer is:
C
`{:("Caffine",,"Nitrogen"),("100 gms",-,"28.9 gms"),("194 gms",-,"28.9 gms"):}`
`therefore" wt of nitrogen per mole = 56 gms"`
4 nitrogen atoms are present per molecule
Promotional Banner

Topper's Solved these Questions

  • SOME BASIC CONCEPTS OF CHEMISTRY

    NARAYNA|Exercise EXERCISE - I (H.W)(NUMERICAL CALCULATIONS BASED ON CHEMICAL EQUATIONS)|19 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    NARAYNA|Exercise EXERCISE - I (H.W)(METHODS OF EXPRESSING CONCENTRATIONS)|9 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    NARAYNA|Exercise EXERCISE - I (H.W)(EQUIVALENT WEIGHT)|3 Videos

  • SOME BASIC CONCEPTS IN CHEMISTRY STOICHIOMETRY (PART-I)

    NARAYNA|Exercise All Questions|555 Videos

  • SOME BASIC PRINCIPLES AND TECHNIQUES

    NARAYNA|Exercise EXERCISE -IV (QUALITATIVE AND QUANTITATIVE ANALYSIS OF ORGANIC OF COMPOUNDS)|8 Videos

Similar Questions

Explore conceptually related problems

Caffiene has a molecular mass of 194 . If it contains 28.9% by mass of nitrogen, number of atoms of nitrogen in one molecule of caffeine is :

The number of atoms present in 1 mole of nitrogen molecule are

Number of ATP required to fix one molecule of nitrogen is

Calculate mass of one atom of nitrogen in gram.

The number of nitrogen atoms in a semicarbazone molecule of acetone is _________.

The molecular weight of an oxide of nitrogen is 30 .What is the number of electron is it ?