What is the name of the star closest to Earth?

OA) the Sun

OB) Betelgeuse

OC) Alpha Centauri

OD) Proxima Centauri

Which one of these equations represents the reaction of a weak acid with a strong base? a. h + (aq) + oh - (aq) → h2o (aq) b. h + (aq) + ch3nh2 (aq) → ch3nh3 + (aq) c. oh - (aq) + hcn (aq) → h2o (aq) + cn - (aq) d.

Which of the following explains the VSEPR geometry of an ammonia molecule? It is tetrahedral because there are four bonded pairs around nitrogen. It is trigonal pyramidal because there are four bonded pairs around nitrogen.

Is Co a chemical compound

Iron is obtained commercially by the reaction of hematite (Fe2O3) with carbon monoxide. How many grams of iron are produced if 13.0 moles of hematite react with 38.0 moles of carbon monoxide?

When liquid detergent dissolves in water, which is the solvent and which is the solute

True or False: It is recommended to use sugar cubes to sweeten lemonade because they have a low surface area.

54,000,000 nanometers equals 0.000000054 megameters.

When cream mixes with coffee, is this a chemical or physical change?

A gas occupies 72.1 at stp. At what temperature would the gas occupy 85.9 L at a pressure of 93.6 kPa?

An 80 kg volleyball player lands from a jump and tries to stop her forward motion. The normal contact force exerted by the floor on her shoes is 2000 N. The friction force exerted by the floor on her shoes is 600 N acting backward on the player.