Which statement best explains why carbon bonds to four hydrogen atoms

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

Its unlawful in the state of florida for any person to operate a motor vehicle unless each passenger of the vehicle under age of

An ancient marble statue is moved from a rural location to a highly polluted city explain how the move might affect the statue and why you think so