I just took a chemistry midterm and our teacher let us keep the exam. I was wondering if you could let me know if I was right or wrong for the following questions. I can ask my professor later for details.

Which of the following are best described as strong acids?
(a) H2SO4 and HI
(b) HNO2 and benzenesulfonic acid
(c) Both a and c
(d) Both a and b
I CHOSE (A) AS MY ANSWER

In the reaction 2NO(g) + Cl2(g) = 2NOCl(g) an increase in the pressure, keeping the temperature constant will
(a) increase the value of Kp
(b) decrease the value of Kp
(c) increase the concentration of NOCl
(d) both a and b
(e) both a and c
I CHOSE (C) WAS MY ANSWER

When hemoglobin, Hb, reacts with oxygen, O2, we get oxyhemoglobin HbO2:
Hb(aq) + O2(g) --> HbO2 (aq)
At high altitude, the partial pressure of O2 is lower. To get adequate HbO2 to live, an organism would likely
(a) produce less Hb
(b) produce more Hb
(c) reduce HbO2
(d) both b and c
(e) none of these
I CHOSE (B) AS MY ANSWER

THANK YOU!

If this is a take home exam, I don't want to help you cheat.

No this was the first chemistry midterm for CHEM 1C taken for the summer session I at UCI. I'm in the same class and I have the questions too. Our professor didn't provide us with the key which I have no idea why if he wanted us to learn from for the upcoming tests.

Please help

To determine if your answers are correct, let's go through each question and explain how to approach them:

1. Which of the following are best described as strong acids?
To identify strong acids, you need to know their dissociation behavior. Strong acids completely ionize in water, meaning they dissociate into ions. The two options given are H2SO4 (sulfuric acid) and HI (hydroiodic acid).

(a) H2SO4 and HI: H2SO4 is a strong acid because it readily dissociates into H+ and HSO4- ions. HI is also a strong acid, as it dissociates into H+ and I- ions.

Since both H2SO4 and HI are strong acids, the correct answer is option (a). Therefore, your choice is correct.

2. In the reaction 2NO(g) + Cl2(g) = 2NOCl(g), an increase in pressure, keeping the temperature constant will:
This question involves Le Chatelier's principle, which states that if a system at equilibrium is subjected to a change, it will shift to counteract the change. In this case, an increase in pressure is applied.

When pressure increases, the system will try to decrease pressure by favoring the side with the fewer gaseous moles. The reaction shows that two moles of NO(g) and one mole of Cl2(g) produce two moles of NOCl(g).

(c) Increase the concentration of NOCl: Increasing pressure will favor the side with the fewer gas molecules, so the reaction will shift to produce more NOCl(g), increasing its concentration.

Therefore, your choice of option (c) is correct.

3. When hemoglobin, Hb, reacts with oxygen, O2, we get oxyhemoglobin HbO2:
This question asks about the behavior of an organism at high altitude where the partial pressure of O2 is lower. There are a couple of considerations to make.

At high altitudes, where the partial pressure of O2 is lower, organisms need to acquire more oxygen to survive. One way to achieve this is by producing more HbO2 to bind to the available oxygen.

(b) Produce more Hb: By producing more hemoglobin, there will be more available binding sites to capture the lower concentration of oxygen in the higher altitudes, allowing organisms to still acquire adequate amounts of HbO2.

Therefore, your choice of option (b) is correct.

Based on the explanations provided, it seems like all your answers are correct. However, please note that without knowing specific details about the exam or your instructor's grading criteria, it's always a good idea to refer to your professor for confirmation and further explanation if necessary.