All matter has both physical and chemical properties. A physical property is one that does not change the chemical nature of matter. Which of these choices is a physical property? A. Solubility

B. Reaction with water

C. Ability to rust

D Flammability

Ogle–2013–blg–0723 is an exoplanet that is similar to earth in size and proximity to its star. this exoplanet has mass m=4.18×1024kg and radius r=5.66×106m. an astronaut whose weight on earth is w=735n lands on the planet. a. calculate m, the mass of the astronaut. b. calculate gp? , the acceleration due to gravity on the surface of ogle–2013–blg–0723. c. calculate wp? , the weight of the astronaut on the surface of ogle–2013–blg–0723. d. calculate v, the minimum velocity required to put an object into orbit above ogle–2013–blg–0723. e. calculate t, the time required to complete an orbit around ogle–2013–blg–0723.

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value