Find the formula mass of `CaSO_4`, if the atomic mass of Ca = 40.1 u, S = 32.1 and O = 16.0 u

The formula mass of KCI in u is ______.

Calculate number of atoms is each of the following. (Average atomic mass : N = 14 u, S = 32 u) a. 0.4 mole of nitrogen b. 1.6 g of sulfur

At 300 K, what is the rms speed of Helium atom? [mass of He atom is 4u, 1u = 1.66 xx 10^-27 kg , k_B = 1.38 xx 10^-23 J//K

Calculate number of atoms in each of the following (Average atomic mass : N = 14 u,S=32 u) 1.6 g of sulphur

Find the approximate value of tan( 45^o 40') given that 1^o = 0.0175c