What mass of hcl in grams is required to react with 0.750 g of al(oh)3?

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a

What causes most sediment to wash or fall into a river

I'm a tad bit confused on how to name compounds with molar mass and was wondering what was the difference between the formulas dealing with covalent and iconic if someone could pls explain these directions that would be great