Consider an atom of gold in which the nucleus contains 79 protons and 118 neutrons. what is its atomic number and atomic mass number?

How do the following changes affect the value of the equilibrium constant for a gas-phase exothermic reaction: 1. removal of a reactant A. increase equilibrium constant B. decrease equilibrium constant C. no effect 2. removal of a product A.

What is the volume of 1 mole of helium gas when the pressure is 1.47 atm and the temperature is 287k

What is the part of an atom that is mostly empty space is the

1) Fe + Cl2 → FeCl, How to balance this 2) Fe + O2 →Fe2O3 How to balance this

Write the symbol notation for the silicon isotope that contains 16 neutrons

What jobs involve chesmistry

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.

What subatomic particle is specifically responsible for combining the atoms together to form a new substance?

A chemist reported that 100 gallons of a gas were available in a laboratory. Which property of the gas did the chemist report?

Is the water density higher than the aluminum density