The number of atoms in 1.2g of carbon - 12 isotope is
1.00 x 10 22
6.02 x 1022
1.20 x 10 23
1.00 x 1023
6.02 x 1024
Correct answer is B
No explanation has been provided for this answer.
The oxidation number of phosphorus in PO 3/4 is
+1
+2
+3
+4
+5
Correct answer is E
No explanation has been provided for this answer.
Diluting the hydrochloric acid
Adding some distilled water
Decreasing the temperature
Grinding the metal into powder
Increasing the pressure
Correct answer is D
No explanation has been provided for this answer.
Which of the following is not a property of magnesium oxide?
High melting point
Dissolution in polar solvents
Presence of ionic bonds
Possession of crystal lattice
Low binding energy
Correct answer is E
No explanation has been provided for this answer.
definite proportion
conservation of matter
reciprocal proportions
constant composition
Correct answer is B
No explanation has been provided for this answer.