A mixture of salt and sand was separated by one student and the following data were collected: Mass of empty beaker 74.39g; Mass of beaker and sample 79.36g; Total volume of filtrate 50.0 mL; Volume of the liquid evaporated 10.0mL; Mass of evaporating dish 49.13g; Mass of evaporating dish and salt 49.87g; Mass of watch glass + filter paper 88.86g; Mass of watch glass + filter paper + sand 90.05g. Complete the information below and show all calculations where requested: a) Mass of Sample... b) Mass of Sand... c) Percent of Sand in Mixture...(show calculation below); d) Total Mass of Salt in Mixture (show calculation below) e) Percent of Salt in Mixture (show calculation below); f) Total Mass of Mixture recovered; g) Percent Recovered. Please the homework is due tomorrow, Sunday, March 28. 2021 at 1:00 pm. The subject is CHEMISTRY 51 COLLEGE LEVEL, THANKS FOR YOUR HARD WORK, SUPPORT AND HELP.

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?