Which element is a noble gas?

(1) krypton (3) antimony

(2) chlorine (4) manganese

Explain how percent yield is calculated

What type of chemical bond can form between an atom with 11 protons and an atom with 17 protons? what type of chemical bond can form between an atom with 11 protons and an atom with 17 protons? non-polar covalent ionic hydrogen polar covalent?

The center of this seesaw is used to balance the board with the seats. The children can easily move up and down without much force. the seesaw is an example of wich simple machine?

The temperature of a system rises by 45°C during a heating process. Express this rise in temperature in Kelvin. (Round the final answer to the nearest whole number.)

In the reaction SO2Cl2 double arrows SO2 + Cl2 heat is evolved. What happens when chlorine (Cl2) is added to the equilibrium mixture at constant volume?

Which of the following is considered to be a chemical property of matter?

How does percent composition by mass contribute to writing a balanced equation?

Raising the temperature of a reacting system increases the rate of the reaction, but does NOT increase the a) activation energy b) number of collisions c) fraction of the reacting particles which possess energies greater than the activation energy

If you have 60 grams of MgCl2 in 5 liters of solution, what is the molarity of this solution?

Is evaporation/condensation a physical or chemical change? Explain