w/w- an abbreviation for by weight, used in chemistry and pharmacology to describe the concentration of a substance in a mixture or solution. Properly speaking, 2% w/w means that the mass of the substance is 2% of the total mass of the solution or mixture. The metric symbol g/g has the same meaning as w/w.
Midlothian's old motto. Midlothian is a city in northwest Ellis County, Texas, United States. The city is 5 miles (8.0 km) southwest of Dallas. It is the hub for the cement industry in North Texas as it is the home to three separate cement production facilities, as well as a steel mill.
1 The median household income in Midlothian is 35% higher than the national average. 2  Male median earnings are 41% higher than female median earnings. 3  The unemployment rate in Midlothian is 15% lower than the national average.  The poverty level in Midlothian is 59% lower than the national average.