A compound with a chemical formula Na₂CX₃ has a formula mass 106 amu. What is the atomic mass of X? (atomic mass C=12. Na = 23 )

How many atoms are there in 1.25 moles of Zn?

The empirical formula of for caffeine is ( C₈H₁₀N₄O₂ )

Acetic acid is ____________ compound.

The empirical formula of glucose is ­­­­­­­­­­­­­­_____________.

The chemical reactions occurs in photosynthesis are studied in ____________ chemistry.

Which of the following is a molecular ion?

Positively charged ions are obtained when

an atom ________________.

Which of the following is a formula unit?

Formula mass of Mg(OH)₂?

(Mg=24, O=16, H=1)

The method and instrument used to

determine the percentage composition melting point, boiling point, etc are studied in ___________ chemistry.

One mole of a substance contains ___________ is number of particles.

The molecular mass of benzene C₆H₆.

Find the number of neutrons in an atom M, whose atomic number is 14 and mass number is 27 :

Which isotope is used to irradiate cancer cells?

Carbon has ____________ isotopes.

The electronic configuration of an atom is 1s², 2s² _,2p⁶, 3s¹. It is denoted by the following symbol?

The valance shell in atom having electronic configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² is ______________.

M-shell has the following sub shell _____________________.