___________is a substance,which has mass and occupies space.
Matter
Unit
Watt
Mass
He, Ar, Kr, Na, K are
Monoatomic
Triatomic
Diatomic
Pentatonic
_____________compound contains carbon essentially.
Organic
Inorganic
Nitrogen
Hydrogen
How many significant figures are there in 1.00 × 106?
3
2
1
0
________is made of two or more elements combined in fixed proportion.
Mixtures
Compound
Elements
None of these
__________is a substance which is made up of only one kind of atoms.
atom
element
matter
none of these
One mole of sugar contains __________ oxygen atoms.
6.6253 × 1024
6.6532 × 1024
6.6235 × 1024
6.5310 × 1024
A solution is prepared by adding 2g of a substance A to 18g of water. Calculate the mass percent of the water. Calculate the mass percent of the solute?
100%
98%
25%
10%
__________ defined as mass of 1 mole of molecules of an element.
Molar volume
Molar molecular mass
Molar volume of gas
Molar volume of liquid
