Can someone explain to me how* i can solve this complex unit conversion to get the answer? Calculate the density of an unknown liquid based on the following data:
Mass of empty pipette 0.94 g
Mass of pipette + liquid 5.12 g
Volume of liquid
4.5 mL

The rock in a lead ore deposit contains 89 % pbs by mass. how many kilograms of the rock must be processed to obtain 1.5 kg of pb?

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

How many moles of gas are present if p=11 atm, v=12l, t=185k?