Electrons, protons, and neutrons are three subatomic particles of an atom. if the atom undergoes a change and becomes a positive ion, which subatomic particle is lost in this process?

a. neutron

b. proton

c. electron

You are making a map of your state in your map scale 1 cm equals 10 km if two cities are 200 km apart how many centimeters apart will they appear on your map

Which of the following is the correct formula for potassium bromide? A. K2Br B. Kbr2 C. Kbr3 D. Kbr

What knowledge is radiometric dating based upon? A. the rate of decay for certain isotopes B. the name of the rocks C. the weight of the samples D. the sequence of layers in the rocks

If there are 4 different gases in a room and the room seems to have a high pressure within it because you keep getting headaches, what would you do to find the total amount of pressure in the room?

When 13.0 g of a hydrocarbon are burned in excess O2, 9.0 g of H2O are formed. What is the formula of the hydrocarbon?

A 0.75mol calcium carbonate (CaCO3) pellet has what mass?

The pH of the acid in the stomach is 2. When a person has heartburn, the acid in their stomach is coming up the esophagus (lower throat) and burning the lining of the esophagus. Why would a person take an Alka Seltzer tablet for heartburn?

Calculate the photon energy (in joules) for the light emitted from the hydrogen atom if ninitial = 4 and nfinal = 2.

The distance from one place to another

What is the purpose of a cell membrane