3 - Which process use to convert heavier hydrocarbons into lighter (gasoline) in the absence of oxygen and in the presence of catalyst?

A - Fractional distillation

B - Melting

C - Cracking

D - Boiling

The group of elements that tend to be found as toxic gases or liquids in their pure form including chlorine, bromine and iodine are called alkali metals true or false

What term is used for the deepest parts of the ocean floor? A) Ridge B) Slope C) Hydrothermal vent D) Trench

Two new planets with equal masses are discovered. Planet A is twice as far from the sun as Planet B. Which of the following is true? A.

Do the benefits of medical marijuana justify its legality?

At STP, which of these substances is most soluble in H2O? (1) CCl4 (3) HCl (2) CO2 (4) N2

What is accuracy? The same as precision It refers to how closely individual measurements agree with each other. It referes to how closely a measured value agrees with the correct value. It increases with the number of measurements.

If we know that 10.0 cm3 of ice has a mass of 9.19 g what is the density of ice

If the pressure of 125 l of gas is changed from 2.52 atm to 1.50 atm the new volume will be

A hot air balloon is filled with 15 moles helium gas and 5 moles nitrogen gas. What is the volume of the balloon at 1.01 atm and 300 K?

5. Which of these changes is a chemical change? A. iron rusting B. water boiling C. glass breaking D. a balloon popping