`H_(3)AO_(4)` has 31.6% of "A" by mass. What is the atomic mass of the atom "A" ?
A 17
B 31
C 35.5
D 40

What will be the mass of one .^(12)C atom in g ?

What will be the mass of one .^(12)C atom in g ?

What will be the mass of one .^(12)C atom in g ?

An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom.

One lakh atoms of gold weigh 3.271 xx 10^(-17) g. What is the atomic mass of gold?

An atom of an element is 55.847 times as heavier as 1/12 mass of an atom of C^12 . What is the atomic mass of the element in amu ?

A sample of MgSO_(4) has 6.023 xx 10^(20)O atoms What is mass of Mg in sample ? .

A compound contains 50% Ca, 15% C and 35% N atoms by mass. Determine the simplest formula of the compound. (R.A.M.: C = 12, N = 14, Ca = 40.)

3.011 xx 10^22 atoms of an element weighs 1.15 gm . The atomic mass of the element is : (a) 10amu (b) 2.3amu (c) 35.5amu (d) 23amu

An oxide of metal M has 40% by mass of oxygen. Metal M has relative atomic mass of 24. The empirical formula of the oxide is: