If an atom has a mass of 15 and an atomic number of 9. How many neutrons are in the atoms?

What volume of gold would be equal in mass to a piece of copper with a volume of 101 ml? the density of gold is 19.3 g/ml; the density of copper is 8.96 g/ml?

A 0.105 L sample of an unknown HNO 3 solution required 35.7 mL of 0.250 M Ba (OH) 2 for complete neutralization. What is the concentration of the HNO 3 solution?

What is the difference between sounds that have the same pitch and loudness?

Explain why ionic crystals melt at much higher temperatures than typical covalent molecular crystals

Why are there different theories about the effects of global warming?

Atoms or groups of atoms with a negative charge

What is true when two reactants combine in an exothermic reaction?

William Tell had only one son and had to shoot an apple from the top of his son's head with his bow and arrow. If you were William Tell and you loved your son, would you rather be accurate or precise?

Sugar burns when heated on a skillet physical or chemical change

What other means of qualitative analysis are used to identify metals