Answer:
For water, its mass in grams is equal to its volume in mililiters.
Explanation:
In general, you can calculate the mass of a substance multiplying its volume with the density:
Mass(g) = Volume(mL) × Density(g/mL)
With the water, it is easiest because density of water is 1g/mL, that means:
(Water) Mass = Volume × Density.
Mass = Volume × 1.
Mass = Volume
<h3>For water, its mass in grams is equal to its volume in mililiters.</h3>
<em>For example. if you have 5mL of water, its mass is 5g.</em>
Answer:
A. 2.44g
B. Kd = 3.2
Explanation:
Concentration of benzoic acid = 50mL = 0.05L
Molecular weight = 122 g/mol
Moles of benzoic acid before the extraction = mass/molecular weight of Benzoic acid
= molar concentration * volume
Moles of benzoic acid before the extraction = 0.05 * 0.4
= 0.02moles of benzoic acid before extraction.
Mass of benzoic acid = 0.02 * 122
= 2.44 g
Partition coefficient, Kd is defined as the ratio of concentration of a substance in an organic medium to the concentration of the substance in the aqueous medium.
Since 1.22g of Benzoic acid was in Dicholoroethane, therefore (2.44 - 1.22)g of benzoic acid was in water.
Mass concentration of benzoic acid in water = mass of benzoic in water/volume of water
= 1.22/0.05
= 24.4 g/L
Mass concentration of benzoic acid in Dicholoroethane = mass of benzoic in Dicholoroethane/volume of Dicholoroethane
= 1.22/0.03
= 40.67g/L
Kd = [concentration]organic/[concentration]aqueous
= 40.66/24.4
= 1.67
Answer:
to make sure that you change one factor at a time while keeping all other conditions the same.
Explanation:
