In a scientific investigation, the term "quantitative data" refers to numbers that are usually followed by by what?

1 Answer
May 11, 2018

Answer:

#"....blocks of flats....?"#

Explanation:

No...#"quantitative data"# are always reported with the #"appropriate units."#

Sometimes the use of units can help you in a chemical calculations. We know that #"concentration"# has units of #"amount of stuff per unit volume"#...

And so for concentration, we would generally take the quotient...

#"Concentration"="Moles (or mass) of stuff"/"Volume of solution"#

..units of #mol*L^-1# apply.....

And when we want to convert a concentration term into a mass of mole quantity, given a specific volume we take the product such that WE GET UNITS of moles in the final answer...

#"How many moles in"# #0.500*L# #1.0*mol*L^-1# #HCl#?

#n_"HCl"=0.500*cancelLxx1.0*mol*cancel(L^-1)=0.50*mol#

When the units DO NOT cancel out, you know you have made a balls-up, which are all too easy to do, and why else go thru the bother of including units in our calculations? And note that this approach works for fyzics too....#F=ma# etc...