What was the significance of the smog in Donora & London?

a. People stopped burning coal to heat their homes

b. The public became aware of air pollution

c. Clean air acts were implemented.

d. Both B and C are correct

What is the function of the phytoplankton in the ocean ecosystem

A student wants to increase the magnetic force between two bar magnets. What should the student do? A Make the positive poles face each other. B Move the magnets farther apart. C Make the negative poles face each other.

The phase of a sample of a molecular substance at STP is not determined by its (1) arrangement of molecules (2) intermolecular forces (3) number of molecules (4) molecular structure

In an experiment Nyla collected the following information about a solution made from a certain food: pH = 3 tastes sour reacts with metals conducts electricity Based on the information, what best describes the solution? A. Base B. Salt C. Neutral D.

What information does a net ionic equation give? O A. It lists only the spectator ions that are present. B. It lists only the components that are ions. O C. It lists only the substances that are changed. D.

If 4.34 moles of potassium react with excess water, how many moles of hydrogen gas would be produced at STP

What is the common name of sodium bicarbonate

The mass of one formula unit of SrCl2 is 158.52 amu. Based on this fact, what conclusion can you draw? A. A mole of SrCl2 particles has a mass of 158.52 g. B. 1 g of SrCl2 contains an average of 158.52 particles. C.

A blank is a special kind of mixture in which one substance is uniformly mixed into another

importance of pH value in daily life