What is the mass number of an atom that contains 19 protons, 19 electrons, and 20 neutrons?

10.0g of calcium carbonate was heated. The mass of calcium oxide left was 5.6g. Calculate the mass of carbon dioxide produced in the reaction.

Bottled gas is stored outside buildings because there is a danger if they are in a fire. explain what can happen to full gas bottles if they are involved ina fire

How many covalent bonds can Carbon, Hydrogen, Nitrogen, Or Oxygen form?

Arrange the isotopes of sulfur and phosphorus in order of decreasing number of neutrons. Rank the isotopes from most to fewest neutrons. To rank items as equivalent, overlap them. S-36 P-35 S-32 P-33 P-32 P-31

Name and explain 2 positives of renewable energy

What type of forces affects the speed and direction of motion of an object? A: Balanced forces B: Unbalanced forces C: Equal and opposite forces in the vertical plane D: Equal and opposite forces in the horizontal plane

Some ionic compounds do not dissolve in water because ... a) the ionic bonds are too strong to be broken by the attraction of the water molecules b) they float on the surface c) water is a covalent compound so it cant dissolve ionic compouds d)

Which element is humus especially rich in? oxygen carbon nitrogen or tungsten

Vitamins are classified according to A. their ability to fight disease. B. their coenzymes. C. their functions in the body. D. their solubility in water and fat.

What is the concentration of a solution of HCl in which a 10.0 mL sample of acid required 50.0 mL of 0.150 M NaOH for neutralization? What is the concentration of a solution of HCl in which a 10.0 mL sample of acid required 50.0 mL of 0.