Ruthenium (101.07 g/mol) is used as a catalyst and to improve titanium's resistance to corrosion. It is also one of the rarest elements in Earth's crust, making up less than one ten-millionth of the crust's total mass. Calculate the mass of 37.0 mol of ruthenium.

Mike walks 100 meter north, then walks 30 meters south. after this, he walks another 10 meters north. what is the magnitude of his total displacement during this walk,in meters?

What are similarities and differences of reflection, refraction, diffraction and absorption?

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.