The density of a gas measured at 20°C is 1.78 x 10-3 g/cm3. What is the volume of 45.0 g of the gas?

a.) 2.53 x 104 g/cm3
b.) 8.01 x 102 g/cm3
cl2,62 x 104 g/cm3

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

An unknown insoluble substance displaced the water shown. it's mass is indicated on the triple beam balance. mass = a. 694 b. 693.5 c. 693.0 d.693.8

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ