An atom of potassium has 19 protons and 20 neutrons. what is its mass number?

What color would you predict milk of magnesium to turn red and blue litmus paper? a. red will turn blue, blue will remain the same b. both will remain the same c. blue will turn red, red will remain the same d. none of the above

which type of organism can be obtained energy directly from any of the other organisms in the ecosystem

Consider the unbalanced chemical equation HBr + B = BBr3 + H2. When coefficients are added to balance the equation, which two substances will have a coefficient of 2? D A. H2 B. HBr C. BBrg D D B

The bond that would form between Cs and Cl can be described as A an ionic bond because both atoms are strongly attracted to each other's electrons but will not let go of their own electrons, therefore they share the electrons.

28 Which compound is an electrolyte? (1) CCl4 (3) C6H12O 6 (2) CH3OH (4) Ca (OH) 2

I'm doing isotope homework and I need the find the number of protons, neutrons, and electrons first one is chromium-58 and chromium-63

Trisha and her lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In one experiment, they added a piece of magnesium ribbon to 10 milliliters of hydrochloric acid.

what mass of magnesium is required to react with excess nitrogen to produce 0.500 mol magnesium nitrade

Silver chromate is sparingly soluble in aqueous solutions. the ksp of ag2cro4 is 1.12 * 10-12 m3. what is the solubility (in mol/l) of silver chromate

What do you think 1,5-pentanedithiol C5H12S would smell like