What type of bonding around a central atom would result in a trigonal planar molecule?
A. Three groups bound to it with no lone pairs
B. One group bound to it with two lone pairs
C. Three groups bound to it with one lone pair
D. Four groups bound to it with no lone pairs

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.

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.