Show work pls Find molar mass then calculate how many grams are in 3.50 mol of NaHCO3

Determine how many particles are in 6.50 mol of Al2 O3

Find molar mass then calculate how many moles and particles are in 210 g of AlF3

Find molar mass then calculate how many moles and grams in 2.41 x 10^24molecules of H2O

Imagine if during the cathode ray experiment, the size of the particles of the ray was the same as the size of the atom forming the cathode. which other model or scientific observation would have also been supported? 1. this would support dalton's postulates that proposed the atoms are indivisible because no small particles are involved. 2. this would support bohr's prediction about electrons moving in orbits having specific energy. 3. this would support bohr's prediction about electrons being randomly scattered around the nucleus in the atom. 4. this would support dalton's postulates that proposed that atoms combine in fixed whole number ratios to form compounds.