Buoys that record el niño can transmit data to satellites in space. what can you conclude from this fact? a. the buoy and its satellite are launched at the same time. b. the buoys are spread out along the equator. c. scientists work and live on the buoys. d. the buoys are equipped with computers.

D

Explanation:

In order for any object to transmit data, the object needs to be equipped with some sort of computer. Buoys are objects commonly found in the ocean, and they can record weather patterns, which can be used to predict the weather in the future. Some buoys are able to transmit data to weather stations via a satellite signal.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%