Which has more number of atoms, 100 grams of sodium or 100 grams of iron(given, atomic mass of NA=23u, Fe = 56u)?

Sodium crystallizes in a body-centred cubic (bcc) unit cell. Calculate the approximate number of unit cells in 9.2g of sodium. (Atomic mass of Na = 23u).

Pragya tested the solubility of three different substances at different temperatures - and collected the data as given below (results are given in thefollowing table, as grams of substance dissolved in 100 grams of water to form a saturated solution). What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate to 50 grams of water at 313K?

Calculate the formula unit masses ofZnO, Na_2O, K_2CO_3 , given atomic masses of Zn = 65u, Na = 23u, K = 39u, C =.12u, and O = 16u.

The atomic mass of sodium is 23 u. What is the number of moles in 46 g sodium?

Pragya tested the solubility of three different substances at different temperatures - and collected the data as given below (results are given in thefollowing table, as grams of substance dissolved in 100 grams of water to form a saturated solution). Find the solubility of each salt at 293K. Which salt has the highest solubility at this temperature?