13. In animals, nitrogenous wastes are produced mostly from the catabolism of

A. phospholipids and glycolipids

B. proteins and nucleic acids.

C. starch and cellulose

D. triglycerides and steroids

E. fatty acids and glycerol

Trevor watches as a freight train passes. He counts eight identical black railroad cars, then a red car, followed by several more black cars.

Where on the periodic table are the nonmetals located

How many atoms are in one molecule of Iron II sulfate

Hydrogen is not chemically stable because

From the diagram, when the temperatures of reactants are raised from 20°C to 30°C: The average kinetic energy doubles. The number of molecules doubles. The total number of collisions doubles. The number of molecules having Er or greater doubles.

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?

Label the molecular shape around each of the central atoms in the amino acid glycine. hint

Which has more atoms, 2moles of carbon or 2 moles of aluminum