4) Cheetahs are endangered, predatory mammals that live in sub-Saharan Africa. Which of the following statements is NOT a reason that animals become endangered?
A) too much biodiversity
B) low genetic diversity
C)loss of habitat
D) environmental changes

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

The fact that the total amount of energy in a system remains constant is a(n)