• 1 mol of beryllium • 1 mol of salt
• 1 mol of water
• 1 mol of hydrogen
Which statement is true about these substances?
They have exactly the same mass.
O They have different numbers of particles.
O They have the same number of atoms.
0 They have different masses.

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 information does a complete ionic equation give that the balanced equation doesn’t show?

Which of the following is not an assumption that scientists must make about the natural world? a. regularity b. causality c. predictability d. plausibility