Select all the pairs that, when mixed in reasonable quantities, can NOT form a buffer solution.

1. HCL and NaClO
2. HCLO4 and NaOH
3. NH3 and NH4Cl
4. HF and NaBr
5. H3PO4 and KH2PO4
6. NaClO and KClO
7. Na2CO3 and NaHCO3

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

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

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?