Chemistry

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.

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

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

Beryllium has the electron configuration 1s^22s^2 . What are the electrons in the 1s sublevel called? a valence electrons b inner-shell electrons c anti-valence electrons d covalent electrons

When should lab participants look at the Safety Data Sheet (SDS) of a substance? Select one: Only if the substance is perceived to be dangerous Before using the substance While working with the substance in lab After completing work with the substance

1. What mass of water is needed to dissolve 34.8 g of CuSO_(4) in order to prepare a 0.521 m solution? square 2. What would the concentration of the solution in question 1 be in units of ppm?

Which of the following has the highest boiling point? CH3CH2CH3 CH3CH2CH2OH

Question 25 of 32 Which element has 4 valence electrons in the 3p sublevel? The Periodic Table A. S B. Ga C. N D. Si

Question 24 of 32 Which sublevels contain valence electrons in an atom of argon (Ar)? The Periodic Table A. 2s and 3d B. 4s and 3p C. 3s and 3p D. 3s and 2p

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