Ariana and Alissa performed the synthesis of Ag2SO4. They measured a known mass of AgNO3, dissolved the salt in water and added this solution to an excess of aqueous K2SO4. They filtered the precipitate of silver sulfate, rinsed it with distilled water, and let it dry overnight. Next day, the mass of silver sulfate was measured. The collected results are shown in the Data Table below.
2 AgNO3(aq) + K2SO4(aq) à Ag2SO4(s) + 2 NaNO3(aq)

After doing the calculations of the theoretical yield and the percent yield, Ariana reports the % yield to be 91.0%, while Alissa claims it is 83.5%. Explain, by doing the corresponding calculations, which of the two students is correct.
Mass of watch glass
2.589 g

Mass of watch glass + AgNO3

5.739 g

Mass of beaker
15.486 g

Mass of beaker + Ag2SO4

18.116 g

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride

What is the relationship between wind and ocean waves? question 17 options: wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves. wind moving at higher speeds will transfer energy over a larger part of the ocean water, resulting in waves with a shorter wavelength. winds moving at higher speeds with cause water to move forward at faster rates, causing larger ocean waves. winds moving at higher speeds will affect deeper water, resulting in waves that move at a faster rate. how do temperature and salinity affect deepwater currents? question 15 options: as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

Which statement best describes the function of enzymes?