Which component of a galaxy has other objects that revolve around it? (A) Dust (B) Star (C) Gas (D) Universe

Benzene, C6H8, has an enthalpy of fusion = 10.19 kJ/mol. Calculate the amount of energy which is needed to change 88.0 g of solid benzene at 5.53°C into liquid benzene, also at 5.53°C?

A molecular biologist measures the mass of cofactor a in an average yeast cell. the mass is 74.06 pg. what is the total mass in micrograms of cofactor a in a yeast colony containing 105 cells

what is taking place during the process of sublimation? How is this process different from evaporation?

A volume of 2000 mL can be expressed as

the pressure of 5.0 L of gas increases from 1.50atm to 1240 mmgh. what is the final volume of the gas, assuming no change in moles or temperature?

During what phase of the moon can a lunar eclipse occur? A) new moon B) first quarter C) waxing gibbous D) full moon

All bodies of water make up a earth's A. atmosphere B. asthenosphere C. hydrosphere D. lithosphere

Which characteristic provides clues to how igneous rocks were formes? A textures B color C luster D streaks

If your heart beats an average of 68 times per minute, how many times will your heart beat in an hour? In a day? In a week? Show all work

The gas described in parts a and b has a mass of 1.66 g. the sample is most likely which monatomic gas?