The density of air at ordinary atmospheric pressure and 25 ∘C is 1.19 g/L. What is the mass of the air in a room that measures 14.5×19.5×7.0ft? Express your answer in kilograms using two significant figures.

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

Imagine that twenty i.u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?

Compare and contrast solutions and suspensions