Can copper be scratched by a fingernail or blade knife. why?

2points why do scientists need governmental funding? o a. government politicians ask all the important scientific questions. o b. scientists have to pay taxes to the government on the money they make. o c. the cost of doing scientific research can be very high. o d. the government is controlled by scientists. submit

Which best describes why nh4+ can form an ionic bond with ci-?

Find the mass in grams of 1.37x1020 particles of h3po4