The mass of one mole of any substance:

A. is equal to 6.02 x 1023 g

B. is equal to the sum of the atomic masses of every atom in the formula

C. is the same for all elements but not molecules

D. is the same for all elements and molecules

When Xavier places his hands near a light bulb, he notices that certain areas around the light bulb are warmer than others. Which best explains this?

What is the concentration of NO3 - ions in a solution prepared by dissolving 30 g of Ca (NO3) 2 in enough water to produce 300. mL of solution. a. 0.305 M b. 0.609 M c. 0.806 M d. None of these

An element has three naturally occurring isotopes. Use the information below to calculate the weighted average atomic mass of the element, showing both the setup and the final answer for the calculation. Isotope Atomic Mass Percent Abundance X 1.

If the waste you have contains 100.0 grams of silver nitrate, how many mols of silver nitrate is this

Write an equation for the preparation of the acetone-bisulfite addition compound.

Which of the following volumes is the smallest?

Which of these are common to all mammals? A: type of reproductive system, brain size, skin B: digestive system, heart lungs C: digestive system, number of toes, blood D: kidneys, liver, skeletal structure

Which explanation best compares the movement of particles in the three states of matter?

A steel tank with a volume of 9.583 L contains N2 gas under a pressure of 4.972 atm at 31.8 °C. Calculate the number of moles of N2 in the tank. a. 0.002 mol c. 0.525 mol b. 0.018 mol d. 1.90 mol

Is phosphorous an atom, element, or compound