A silicon -containing ore has 92% 28Si, 5% 29Si and 3% 30...
A silicon -containing ore has 92% 28Si, 5% 29Si and 3% 30Si. Calculate the relative atomic mass of the silicon.
14.00
29.00
28.11
28.00
Correct answer is C
(92100 x 28) + (5100 x 29) + (3100 x 30) = 28.11
Hardness of water is mainly due to the presence of ...
The oxidation number of X in XO3−4 is...
What is the chemical symbol for Scandium? ...
A solid X when heated gives off a brown gas. If X is soluble in excess sodium hy...
The rate of a chemical reaction is NOT affected by one of these factors ...
How many unpaired electron are in the p-orbitals of a fluorine atom? ...
From the above diagram; The caustic soda in the conical flask serves to ...
In the preparation of ammonia, which of the following is used as the drying agent? ...
A mixture containing two salts of different solubility can be separated by ...