Home
Class 12
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 molecular of caffeine is:

A

4

B

6

C

2

D

3

Text Solution

Verified by Experts

The correct Answer is:
A
Mass of nitrogen is 194 amu caffeine `=(28.9)/(100)xx194`
=56 amu
Promotional Banner

Topper's Solved these Questions

  • BASIC PRINCIPLES

    OP TANDON|Exercise SET-II|6 Videos

  • BASIC PRINCIPLES

    OP TANDON|Exercise Assertion|13 Videos

  • BASIC PRINCIPLES

    OP TANDON|Exercise SET-2|7 Videos

  • ALDEHYDES AND KETONES

    OP TANDON|Exercise SINGLE INTEGER ANSWER TYPE QUESTIONS|10 Videos

  • BASIC PRINCIPLES OF ORGANIC COMPOUNDS (MECHANISM OF ORGANIC REACTIONS)

    OP TANDON|Exercise SINGLE INTEGER ANSWER TYPE QUESTIONS|4 Videos

Similar Questions

Explore conceptually related problems

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

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

An oxide of nitrogen contains 36.8% by weight of nitrogen. The formula of the compound is

An alkaloid contains 17.28% of nitrogen and it's molecular mass is 162. The number of nitrogen atoms present in one molecular of alkaloid is

OP TANDON-BASIC PRINCIPLES-LEVEL B set1
  1. An electric discharge is passed through a containing 50cc of O(2) and ...

    Text Solution

    |

  2. The mass of carbon present in 0.5 mole of k(4)[Fe(CN)(6)] is:

    Text Solution

    |

  3. Caffeine has a molecular weight of 194. if it contains 28.9% by mass o...

    Text Solution

    |

  4. Chlorine can be prepared by reacting HCL with MnO(2). The reaction is ...

    Text Solution

    |

  5. What is the mass per cent of oxygen in Al(2)(SO(4))(3).18H(2)O? The mo...

    Text Solution

    |

  6. 0.25 g of an element 'M' reacts with excess fluorine to produce 0.547g...

    Text Solution

    |

  7. How many electron are present in 2xx10^(-3) moles of .(8)^(18)O^(2-)?

    Text Solution

    |

  8. Fluorine reacts with uranium to form UF(6). U(s)+3F(2)(g)rarrUF(6)(g...

    Text Solution

    |

  9. What is the formula of a substance with mass percentage of 35.79% for ...

    Text Solution

    |

  10. In 1811, Avogadro calculated the formula of camphor by means of elemen...

    Text Solution

    |

  11. A quantity of aluminium has a mass of 54g . What is the mass of same n...

    Text Solution

    |

  12. When 1 L of CO(2) is heated with graphite, the volume of the gases col...

    Text Solution

    |

  13. Which of the following has greatest number of atoms?

    Text Solution

    |

  14. A metal oxide has the formula M(2)O(3). It can be reduced by H(2) to f...

    Text Solution

    |

  15. In a compound of molecular formula A(m)B(n):

    Text Solution

    |

  16. 4.4 g of CO(2) and 2.24 litre of H(2) at STP are mixed in a container....

    Text Solution

    |

  17. A partially dried clay mineral contaisn 8% water. The original the par...

    Text Solution

    |

  18. Which of the following is isomorphous with MgSO(4).7H(2)O?

    Text Solution

    |

  19. 10 mL of mixture containing carbon monoxide and nitrogen required 7mL,...

    Text Solution

    |

  20. 1.44 g of titanium (Ti) reacte with excess of O(2) and produced x gm o...

    Text Solution

    |