A student finds a rock on the way to school. In the laboratory he determines that the volume of the rock is 25 cm, and the mass in 100 g. What is the density of the rock? 125 g/cm3
0.25 g/cm3
75 g/cm3
4 g/cm3

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

All forces cause motion? true or false

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.