Acar rolls down a ramp. what is the force acting on the car that causes the movement down the ramp? a) acceleration b) centripetal c) friction d) gravity

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

How many lone pairs of electrons are on the central atom of no3- and what is the molecular shape? one, trigonal planar zero, trigonal pyramidal zero, trigonal planar one, tetrahedral one, trigonal pyramidal