2zn+o2=2zno how many moles of zinc are needed to make 6 moles of zinc oxide?

Which of the following is not true about the atomic model of substances?

Which is true about metals used for jewelry, such as platinum and gold? a. they have low flammability. b. they have low reactivity. c. they have high flammability. d. they have high reactivity.

Exit what is the density of an object having a mass of 5.0 g and a volume of 45.0 cm3?