What pressure will be exerted by 10 moles of hydrogen gas in a 7.5 L cylinder at 20°C? (Given: R = 8.314 L∙kPa/K∙mol)

What type of particle is helium and what is it a nucleus of?!

What allows electrons to flow between electrodes in an electrochemical cell? a - conducting wire b - salt bridge c - electrolyte solutions d - battery

What is the only metal that is a liquid at room temperature? a.) mercury b.) lithium c.) magnesium d.) scandium

A 1.525g sample of a compound between nitrogen and hydrogen contains 1.333 g of nitrogen. Calculate its empirical formula. The empirical formula is?

What happens at the cathode? O A. Metal ions are oxidized. O B. Metal ions are released into solution. O C. Metal ions donate electrons. O D. Metal ions form solid metal.

One amu is equal to the mass of an electron the mass of one proton or one electron the mass of one neutron or one electron the mass of one neutron or one proton

Given an unknown mixture consisting of two more substances, explain how could you determine whether that mixture is a true solution, a colloid or a suspension

Which isotope of lithium has 3 neutrons?

Write the complete electron configuration for the noble gas found in the third period

Convert 0.023 kg to centigran