Platinum has a density of 21 g/cm^ 3 . A platinum ring is placed in a graduated cylinder that contains water. The water level rises from 4.0 mL to 4.2 when the ring is added. What is the mass of the ring? A. 4.2g B. 5.2 g C. 3.8 g D. 2.6

Nonpoint source pollution is difficult to control because it

What are the chemical names of these compounds? ke: mg3n2: reset next

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.