A sample of gas has a volume of 210 cubic centimeters at a temperature of 250 Kelvin. The temperature is raised to 500 Kelvin while the pressure remains unchanged. What is the new volume in cubic centimeters of the gas?

(a)  

What is the name given to the temperature and pressure at which solid, liquid, and gas coexist for a pure material?

(a)  

A 6.00-L reaction vessel at 491⁰C contained 0.488 mol H₂, 0.206 mol I₂, and 2.250 mol HI. The equation is

H_2(g) + I_2(g) ⇄ 2HI_{(g) .}

Assuming that the substances are at equilibrium, find the value of K_c at this temperature.

(a)  

Arginine vasopressin is a pituitary hormone that regulates the amount of water in the blood by reducing the flow of urine from the kidneys. An aqueous solution containing 21.6 mg of vasopressin in 100.0 mL of solution has an osmotic pressure at 25^oC of 3.70 mmHg. What is the molar mass of the hormone?

(a)  

An effective hand sanitizer contains at least this percentage of ethyl/isopropyl alcohol to kill the coronavirus and other viruses.

(a)  

Camels store the fat tristearin (C₅₇H₁₁₀O₆) in the hump. Aside from being a source of energy, the fat is a source of water because when it is used as a source of nourishment when food is scarce, the following reaction takes place,

2C₅₇H₁₁₀O_5(s) + 163 O_2(g) → 114 CO_2(g) + 110 H₂O_(l)

How many liters of water can a 1-kg of fat produce?(Molar mass of fat: 890 g/mol, water: 18 g/mol, CO₂= 44g/mol, O₂ = 32g/mol)

(a)  

In the space shuttle, the CO₂ that the crew exhales is removed from the air by a reaction within canisters of lithium hydroxide. On average, each astronaut exhales about 20.0 mol of CO₂ daily.

CO_2(g) + 2 LiOH_(s) → Li₂CO_3(aq) + H₂O_(l)

If the budget of LiOH(Molar mass= 23.95 g/mol) a week is 47,900 moles a week. How many grams of LiOH will be in excess that will not react with the waste of 3 astronauts and 1 chimpanzee in seven days?

(a)  

During this pandemic, is it important to complete a 14-day quarantine as per advised by any community quarantine category. Why 14 days? What does this number represents?

(a)  

What does it mean by the acronym RT-PCR?

(a)