What is the correct name for the compound mn 3(po 4)2manganese (ii) phosphatemanganese phosphatemanganese (i) phosphate manganese (iii) phosphate?

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

Displacement is the slope of a velocity vs. time graph a. true b. false

Iwould appreciate if someone could me.