Water, H2O, frequently forms Hydrogen Bonds with other non metal atoms. Why does water do this?

A: the Oxygen has a partial negative charge which attracts atoms and molecules that have a position or partial positive charge

B: The Hydrogen has a partial negative charge which attracts atoms and molecules that have a positive or partial positive charge

C: Because Oxygen is extremely electronegative it attracts atoms and molecules with a negative or partial negative charge

D: Because Hydrogen has a very low electronegative rating it attracts atoms and molecules with a positive or partial positive charge

If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged