In performing any laboratory experiment, what is the first step performed out of the following choices? A) collect data B) analyze data C) publish results D) form hypothesis

Explain why c6h5ch2ch2br is not formed during the radical bromination of c6h5ch2ch3. select the single best answer.

Which of the following is an example of electrical energy transforming into mechanical energy? A. carrying people in an electric elevator B. using a light bulb to light a room C. using magnets to create an electric current D.

Write the complete electron configuration of germanium, element 32

What volume of 0.200 M HCl will react with 0.2500 g of CaCO3? CaCO3 (s) + 2 HCl (aq) ➔ CaCl2 (aq) + H2O (l) + CO3 (g).

What is the molality of an aqueous kbr solution with a mole fraction of kbr, x, equal to 0.245?

In calcium fluoride, what is the closets noble gas that each ion becomes?

Americium-241 is used in some smoke detectors. it is an alpha emitter with a half-life of 432 years. how long will it take in years for 45.0 % of an am-241 sample to decay?

What is the purpose of forming a scientific hypothesis? It starts a plan to test your idea It provides the answer to your investigation It allows you to prove your idea is correct

N2 + 3h2 2nh3 how many moles of hydrogen are needed to completely react with two moles of nitrogen?

While in Europe, if you drive 119 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 30.0 mi/gal? Assume that 1euro=1.26dollars.