5. Why is the molecular formula for magnesium sulfide MgS instead of Mg_(2)S_(2) Empirical formulas are always used for all compounds instead of molecular formulas. Scientists always reduce the formulas from ionic compounds because the ratio of ions is what is important. Scientists only need to simply when the subscripts are the same number.

Name the following compound. 2-ethylhex-1-ene 4-ethylhex-4-ene 3-methylhept-1 -ene

Which option will increase the rate of reaction? removal of one of the reactants decrease the volume of container lower the temperature of reaction reduce the pressure in the container

An element cannot be broken down by chemical means. True False

Why is vaporization classified as a phase change? It forms ash Identity changes It is reversible and involves state change It forms new compounds

Mixtures can be separated by physical changes. Please select the best answer from the choices provided T F

Complete the atomic orbital diagram for the ground-state electronic configuration of phosphorus. $\square $ $\square $ $\square $ $\square $ $\square $ $\square $ $\square $ $\square $ $\square $

Which of the following statements about a catalyst is true? A catalyst accelerates a reaction by lowering the energy of activation. A catalyst accelerates a reaction by raising the energy of activation. A catalyst accelerates a reaction by changing the amount of reactant and product at equilibrium. A catalyst accelerates a reaction by lowering the equilibrium constant.

Which of the following types of compounds can form hydrogen bonds with itself? Alcohols ethers alkenes

13. Base your answer to the following question on the balanced equation below. $2Na(s)+Cl_{2}\rightarrow 2NaCl(s)$ Explain, in terms of electrons, why the bonding in NaCl is ionic.

The compound $2,4,6$ trimethylheptane has how many chiral centers? o 3 1 4