Which two notations represent isotopes of the same element

At what concentration does sugar (covalent compound) conduct electricity?

Which of the following contains the smallest amount of matter

Beginning with an explanation of gravity's effect on a nebula, explain how we humans owe our existence to gravity.

A 0.1 mm3^3 3 sample of human blood has approximately 6000 red blood cells. An adult typically has 5.0 L of blood. How many red blood cells are in an adult? (1 mL = 1 cc). Use "E" for scientific notation.

Objects in free-fall ___. do not experience air resistance do not experience gravity are accelerating faster than 9.8 m/s/s are completely weightless

If 125 mL of a 1.1 M glucose solution is diluted to 500.0 mL, what is the molarity of the diluted solution? Express your answer using two significant figures.

What do you chemically call water?

Can beryllium be broken down by chemical change?

What is the total number of atoms in this formula? NaHCO3

An object was measured by a worker as 14.6 cm long, however, the manufacturer specifications list the length of the object at 14.4 cm. What is the percent error in the workers measurement