A substance with a pH of 4.0 will

a. change red litmus paper to blue.

b. change blue litmus paper to red.

c. not change red or blue litmus paper.

d. not be testable using litmus paper.

What is alchemy? is it magic? is it ... weird chemistry or science?

The chemical properties of an atom are primarily determined by the number of

Which situation will most likely cause the sustainability of an ecosystem to weaken? A zebra is killed and eaten by a lion. A disease wipes out several plant species. A frog lays hundreds of eggs that hatch into tadpoles.

Why is global warming called the greenhouse effect?

Why do consumers feel warmer after eating a meal

What compares a law and a theory?

Explain what domain would best be represented by the "?" in the diagram. A) Eukarya because the organisms are all eukaryotic. B) Eukarya because the organisms are all prokaryotic. C) Bacteria because some of the organisms are autotrophs.

If you are eating a hamburger, it is an example of a consumer eating another consumer. a) true b) false

What mass of NaNO3 is needed to make 3.5 L of 2.2 M solution? (Na = 23.0g, N=14.0g, O=16.0g) Explain in steps

In which group do all atoms have seven valence electrons in the ground state?