NH3 = 17
NH4CI = 53.5
NH4NO3 = 80
(NH3)2SO4 = 132
Correct answer is A
No explanation has been provided for this answer.
240g
24g
2.4g
0.24g
Correct answer is A
No explanation has been provided for this answer.
Bees are regarded as the friends of the farmer because they
Usually sting the farmer
Are harmless insects
Help in pollination
Produce nectar for human use
Correct answer is C
No explanation has been provided for this answer.
The force of attraction between covalent molecules is?
electrostatic attraction
hydrogen bonding
ionic force
van der Waals forces
Correct answer is A
Covalent bond involves the interatomic linkage that results from the sharing of an electron pair between two atoms. The binding arises from the electrostatic attraction of their nuclei for the same electrons.
Water molecules are held together by
covalent bond
hydrogen bond
ionic forces
van der Waals forces
Correct answer is B
No explanation has been provided for this answer.