Use the periodic table to determine the molar mass of each of the following elements. Use the correct number of significant figures. Potassium (K):
39.10
g/mol
Osmium (Os):
190.23
g/mol
Manganese (Mn):
54.94
g/mol
Use the information provided below to answer the questions.

The isotope lead-208 (208Pb):
g/mol
The isotope strontium-87 (87Sr):
g/mol

Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer