If joey ran 28 meters in 4 seconds, then his velocity was m/s

Which of these SI units would measure the volume of a substance? A. square meter B. square kilogram C. cubic meter D. cubic kilogram

Consider the reaction of 2-chloro-2-methylpentane with sodium iodide. Assuming no other changes, how would it affect the rate if one simultaneously doubled the concentration of 2-chloro-2-methylpentane and sodium iodide? Group of answer choices

What type of reaction is the following? 2Fe2O3 + 3C - > 4Fe + 3CO2 Why is this not considered single displacement?

What is true of a solution of 2.0 m nacl (aq) It contains 2.0 moles of naci per 1 liter of solution It contains 2.0 grams of naci per 1 liter of solution It contains 2.0 grams of naci per 100grams of water It contains 2.

A person's heartbeat is 68 beats per minute. If his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does the person live? Disregard leap years.

The atomic number of calcium (Ca) is 20, and it's mass number is 40. What is true about the subatomic particles that make up a neutral atom of calcium? A) It has 20 protons, 20 neutrons and 20 electrons.

Explain why a sidewalk has built-in cracks every few feet?

How many periods does the periodic table have? 7 18 9 8

Which one is correct A. It allowed them to escape B. It allowed them to chase down C. It allowed them to reach food D. All of these

A 20.0 mL sample of hydrochloric acid was neutralized with 58.4 mL of 0.250 M NaOH, in a titration. a. Write the balanced chemical equation for the reaction, b. What is the concentration of the hydrochloric acid?