8- SO
Streek
A.
1 mol Co
4.00 x 1023 atoms Cox
6.02 x 1023 atoms Co
6.02 x 1023 atoms Co
B. 4.00 x 1023 atoms Cox
1 mol Co
Which of the following dimensional analysis setups will correctly
convert 4.00x1023atoms of cobalt to moles of cobalt? How many
moles of colbalt are there?
setup A: 0.664 mol Co
setup B: 2.41x1047mol Co
setup B :0.664 mol Co
setup A 2.41*10*mol Co

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.