Number of moles in 36 grams of Helium

Which statement best explains why the atomic theory developed efficiently?

A car with a mass of 1,100 kg is moving with a velocity of 30 m/s due east. What is the moment?

What balances charges that may build up as reduction and oxidation occur in a voltaic cell? a. the salt bridge c. the electrolyte solutions b. one of the half-cells d. the moving electrons

In examining a protein molecule, you discover that it has not folded properly. Why is this alarming? This may impact the function of the protein, possibly causing disease or allergies.

This element has more than 50 but less then 75 protons, and it is in group 17

An analytical chemist is titrating 242.5 mL of a 1.200 M solution of hydrazoic acid HN3 with a 0.3400 M solution of NaOH. The pKa of hydrazoic acid is 4.72. Calculate the pH of the acid solution after the chemist has added 1006.

A gas stream contains 18.0 mol% hexane and the remainder nitrogen. the stream flows to a condenser, where its temperature is reduced and some of the hexane is liquefied. the hexane mole fraction in the gas stream leaving the condenser is 0.0500.

What type of solution is aerated water. why is it so.

What elements form chemical bonds

Which of the following is not a pseudoscientific claim