Explanation:
Chlorine atom has an atomic number of 17
Electronic configuration
Cl = 1s2 2s2 2p6 3s2 3p5
Cl- = 1s2 2s2 2p6 3s2 3p6
Soduim atom has an atomic number of 11
Electronic configuration
Na = 1s2 2s2 2p6 3s1
Na+ = 1s2 2s2 2p6
Calcium atom has an atomic number of 20
Electronic configuration
Ca = 1s2 2s2 2p6 3s2 3p6 4s2
Ca2+ = 1s2 2s2 2p6 3s2 3p6
Answer:
individual isotopes
Re 185 = 139.094
Re 187 = 232.815
Explanation:Correcting the typo error for natural abundance as 37 40 as 37.40 and 62 60 as 62.60
Answer is found as follows
For Re 185 natural abundance 37.40%
371.9087 x 37.40/100 = 139.0938538
six significant figures after rounding off = 139.094
For Re 187 natural abundance 62.60
371.9087 x 62.60/100 = 232.8148462
six significant figures after rounding off = 232.815
The balanced chemical formula should be Al2(SO4)3 + 6NaOH = 2Al(OH)3 + 3Na2SO4
Therefore the coefficient of Al(OH)3 is 2!
Hope that helps :)
The relation between density and mass and volume is

the dose required is 2.5 tsp
each tsp contain 5mL
So dose required in mL = 2.5 X 5 = 12.5 mL
the mass will be calculated using following formula


The mass of dose in grams will be 15.38 g