67g of K2O is how many moles

The high electrical conductivity of metals is primarily due to (1) high ionization energies (2) filled energy levels (3) mobile electrons (4) high electronegativities

Explain how kidneys remove waste from the body and keep fluids and salts in balance

How many molecules are there in 223 grams of Na2SO4?

Which scientist is correctly matched with his contribution to atomic theory? Rutherford inferred the existence of a dense, positively charged nucleus based on results of a scattering experiment. Bohr confirmed the existence of protons in the nucleus.

In what ways do the agout and the brazil nut tree depend on each other?

Why is it important for an art conservation scientists to study the properties of a painting before it is repaired

How many different kinds of atoms occur naturally on earth? Why do you think so

Can a particle be a single atom? can a particle be a molecule?

Which is one way that in advance and biotechnology companies unintended consequence is that harm the environment? a. genetically modified plants require less water to grow b. patient using insulin pumps live longer than those without the pumps c.

A 27.3 g marble sliding to the right at 21.0 cm/s overtakes and collides with a 11.7 g marble moving in the same direction at 12.6 cm/s. After the collision, the 11.7 g marble moves to the right at 23.7 cm/s. Find the velocity of the 27.