Steve uses clay to model the law of conservation of matter. first, he finds the mass of a ball of clay on a balance. then, he molds the clay into a different shape without adding or removing clay. finally, he finds the mass on a balance again. how will steve's results show the law of conservation of matter? a. the results will show that both the shape and the mass have changed. b. the results will show that the shape has changed, but the mass is the same. c. the results will show that changing the shape has changed the mass of the clay. d. the results will show that the larger the shape, the greater the mass.

0.09 moles of sodium sulfate in 12 ml of solution

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

Which three statements represent the benefits of performing experiments using computer simulations?