MEDIUM
Earn 100

The reaction of the burning of carbon in oxygen is represented by equation

C(s)+O2(g)  CO2(g)+Heat+Light

When 9.0 g of solid carbon is burnt in 16.0 g of oxygen gas the mass of carbon dioxide gas formed would be:

(Note: Atomic mass of C-12,o u, O=16.0 u)

 

 

50% studentsanswered this correctly

Important Questions on Chemistry

MEDIUM
Two samples A and B of a pure substance containing elements Y and Z are obtained from two different sources. 5g of sample A contains 1.25g of Z. Sample B is made of 75% of Y by weight. This is an illustration of which of the following laws?
MEDIUM

The visible universe is estimated to contain 1022 stars. How many moles of stars are present in the visible universe.

 

MEDIUM

Identify the incorrect statement for the reaction 2H2S+SO2  3S+2H2O is:

(Atomic mass of S=32)

EASY

The molecular mass of sulphuric acid is 98. If 49 g of the acid is dissolved in water to make one litre of solution, what will be the strength of the acid?

MEDIUM
Which solution is isotonic with 6% w/v aqueous solution of urea? [Molar mass of Urea=60 gm. mol-1 ]
EASY

How many hydrogen atoms are contained in 1.50g of glucose (C6H12O6)?

EASY
Atomic mass of nitrogen is 14 u. Which of the following sample contain 6.022×1023 nitrogen atoms?
MEDIUM
What is the number of atoms in 46 g of sodium-23 (N = Avogadro constant)?
HARD
The volume occupied by half a mole of a gas at standard temperature and pressure is:
EASY
A tincture of iodine is an antiseptic for fresh wounds. It is a dilute solution of elemental iodine, which does not contain _____. 
EASY

The phenomenon of scattering of light by colloidal particles is called ______.