50 POINTS IF YOU GET RIGHT -1) A solid metal sphere with a mass of 18.45 g is added to 21.7 mL of water in a graduated cylinder. The water level rises to 26.8 mL. Calculate the density of the sphere.
-2)What is the density of a metal cube that is 1.30 cm in length and has a mass of 8.402 g.
-3)The handbook density of gold is 19.3 g/cm3. In the lab a student observes it to 18.4 g/cm3. What is her percent error?

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

Sugar is dissolved in water. which is the solute? sugar neither both water

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.