Which mammal below lays tough leathery eggs? A) bear (placental) B) duck-billed platypus (monotreme) C) kangaroo (marsupial) D) bat (placental)

A scuba diver that ascends to the surface too quickly can experience decompression sickness, which occurs when nitrogen that dissolves in the blood under high pressure, forms bubbles as the pressure decreases during the ascent.

When an atom that has no charge loses two electrons, it becomes a: A: positive ion. B: negative ion. C: positive isotope. D: negative isotope.

Mrs. Smith is demonstrating a chemical change for her class. She places 15 grams of baking soda into a beaker. Next she adds 15 grams of vinegar to the same beaker. When the two compounds make contact, they bubble and fizz a great deal.

How does the written lewis structure for potassium chloride differ from that of hydrogen chloride?

The density of phosphorus vapor at 310 degrees celcius and 775 mmHg is 2.64g/L. what is the molecular formula of the phosphorus under these conditions?

Two ligands, a and b, both form complexes with a particular metal ion. when the metal ion complexes with ligand a, the resulting solution is red. when the metal ion complexes with ligand b, the resulting solution is yellow.

Distinguish between the structures of arteries, capillaries, and venies. what is the function of each.

How much water should be added to 30 l of a 40 acid solution to reduce it to a 30 solution?

For the reaction BaSO3 (s) ↔ BaO (s) + SO2 (g), the equilibrium constant is 0.345 M. What is the concentration of SO2 at equilibrium? A. 0.035 M B. 0.070 M C. 0.280 M D. 0.420 M E. None of the Above

Calculate the molar mass of salicylic acid, c7h6o3.