If 2.0 moles of a substance are dissolved in 2.0 liters of solution, then the molarity of this solution is:

0.5 m

1.0 m

1.5 m

2.0 m

Bohr's model could only explain the spectra of which type of atoms? single atoms with one electron single atoms with more than one electron bonded atoms with one electron bonded atoms with more than one electron

Compare and contrast physical changes with chemical changes.

Can someone me with 1 to 4 plz. fast