Molar mass = 133.34 g/mol
_______________THE ANSWER IS D______________
Answer:
1.97201398 g
Explanation:
Multiply the theoretical yield by the percent yield. Don't forget to move the decimal over 2 on the percent before multiplying or to use the percent button on your calculator.
According to Ideal Gas Equation, Volume is related to Pressure and Temperature as follow,
P V = n R T
Or,
V = n R T / P
This relation shows that Volume is directly related to Temperature and Inversely related to pressure. So,
<span>A. Chilling a can of soda: As temperature is decreased so the volume will also decrease.
</span><span>B. Heating a hot-air balloon: As temperature is increased, so Volume will also increase.
</span><span>C. Squeezing a balloon: As pressure is applied, so volume will decrease.
</span><span>D. Pressurizing an air tank: Again pressure is applied so volume will decrease.</span>
This problem is providing information about possible causes whereby mussel shells are being eroded due to the acidity in the ocean. In such a way, it claims that more acidic oceans dissolve calcium carbonate in a faster way and produce hydrogen carbonate ions, and thus, a feasible explanation is required as well as a hypothesis according to the following choices:
a. Lower CO₂; this reduces the H₂CO₃ and increases the pH.
b. Add CO₃²⁻: this will add base and increase its concentration.
c. Add Ca²⁺: this will increase the precipitation rate of calcium carbonate (correct choice).
<h3>Equilibrium equations:</h3>
At first instance, we should recall the equilibrium equations that take place when acidic oceans dissolve calcium carbonate in a faster way:


<h3>Shifts from equilibrium:</h3>
Where we can see that the first choice is thoroughly discarded as the addition of CO₂ actually increases the ionizable carbonic acid (acidity). Moreover, the addition of CO₃²⁻ may also lead to the formation of more protons-releasing carbonic acid which also contributes to the acidity of the ocean.
<h3>Hypothesis:</h3>
Thereby, the correct condition that, for sure, contributes to the preservation of mussel shells will be the addition of Ca²⁺ and the hypothesis will be that it shifts the equilibrium towards the formation of more CaCO₃, the active compound in these shells.
Learn more: