concentration = molarity
molarity= moles/ volume (in liters)
H=1g
F= 19g
1gH+ 19gF= 20gHF
20gHF x (1 mol HF/ 20gHF) = 1mol HF
2.0x10^2ml= 200ml x (1L/1000mL)= .200L
Concentration= 1 mol HF/ .200L
Concentration= 5M
100 g per litre, which is 2.5 M.
40mn
Density of etyl acetate
you can only use the following glassware 5 10 20 25 and 50ml pipette 50 100 200 or 500ml volumetric flasks
1 mole of NaCl is 58.44 g 200 g NaCl * (1 mol NaCl/58.44 g NaCl) = 3.422 mol NaCl There are about 3.4 moles in 200 grams of NaCl.
around 400 grams
The concentration is 1 mol/L or 5,611 g KOH/100 mL solution.
200ml of solution x 20% of alcohol = 40ml of alcohol..
40mn
a lot
you simply divide the gram amount of sugar by the gram amount of water, and multiply by 100. So the mass percent is (2.45/200)x100=1.225%
Density of etyl acetate
20 grams is equivalent to 20ml. 20ml(sample) +180ml(diluent) = 200ml. 20ml is 10th part of 200ml. Ratio will yield a 1:10 dilution.
You want 500ug i.e. 0.5mg/ml. You have 100mg. So you need 200ml of solvent. This is because 100/0.5*1 is 200ml.
visit this... mv.org/cms/lib/PA02218547/Centricity/Domain/98/chemistry_matter_and_change.pdf
It is 2.5 molar. The reason for this is that molarity means moles per litre. You have to multiply by 5 to get from 200ml to a litre, so you have to do the same with the moles.
you can only use the following glassware 5 10 20 25 and 50ml pipette 50 100 200 or 500ml volumetric flasks
200mL equates to 2dL (deciliters).