Determine the number of molecules of NaCl in 91 grams of NaCl. Select one:
a. 3.3 x 10^18
b. 1.5 x 10^13
c. 9.4 x 10^23
d. 6.022 x 10^23

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out

Rays from the sun are not considered matter true or false