Which of the following could be used to describe the rate of a reaction?

change in time/change in concentration

change in mass/change in concentration

change in concentration/change in time

change in concentration/change in mass

Which of the following is not equal to 120 centimeters

N order is written for 10 ml of a 0.125% bupivacaine injection and 10 ml of morphine injection (1 mg/ml) to be mixed with 250 ml of normal saline. the infusion is to be administered over 3 hours. the iv set delivers 20 drops/ml.

An electron in a 3s3s orbital penetrates into the region occupied by core electrons more than electrons in a 3p3p orbital. An electron in a orbital penetrates into the region occupied by core electrons more than electrons in a orbital. true false

If 32.78 ml of naoh solution is required to neutralize 20.00 ml 0f 0.2500 m of sulfuric acid, h2so4 (aq), what is the concentration of the naoh solution? the balanced equation is: 2naoh (aq) + h2so4 (aq) → na2so4 (aq) + 2h2o (l)

A compound has the molecular formula C6H12O6. Which class of organic compounds does it belong to?

Selena is growing geraniums outdoors in a pot. During the day, the temperature in her area averages 22°C (72°F). At night, the temperature has been dropping to around 13°C (55°F). What advice would you give to Selena and why?

How many carbons are in a molecule of hexane?

How does th composition of a mixture of hydrogen and oxygen differ from the composition of a compound containing hydrogen and oxygen?

You are asked to prepare 500 mL 0.250 M acetate buffer at pH 5.00 using only pure acetic acid (MW=60.05 g/mol, pKa=4.76), 3.00 M NaOH, and water. Answer the questions regarding the preparation of the buffer. 1.

Which direction do electrons move in when metals react with non-metals?