Answer:
22.81 g
Explanation:
Given that:
Pressure = 1.68 atm
Temperature = 46 °C
The conversion of T( °C) to T(K) is shown below:
T(K) = T( °C) + 273.15
So,
T = (46 + 273.15) K = 319.15 K
Volume = 8.99 L
Using ideal gas equation as:
PV=nRT
where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is Gas constant having value = 0.0821 L.atm/K.mol
Applying the equation as:
1.68 atm × 8.99 L = n × 0.0821 L.atm/K.mol × 319.15 K
<u>⇒n = 0.5764 moles
</u>
Given that :
Amount of methane = 4.88 g
Molar mass = 16.04 g/mol
The formula for the calculation of moles is shown below:
Thus,
<u>Moles of Krypton = Total moles - Moles of methane = 0.5764 - 0.3042 moles = 0.2722 moles</u>
Also, Molar mass of krypton = 83.798 g/mol
So,
The formula for the calculation of moles is shown below:
Thus,
<u>Mass of krypton = 22.81 g</u>
<span>Weight measured as a force in Newtonsis best described by the answer that is listed under option C. It is a measure of gravitational force on an object. So, interestingly an item with a specific mass of say 120KGs on earth would weigh 1200 N but on the moon only weigh 200 N due to the smaller gravitational force.</span>
Answer:
C, A, D and B
Explanation:
Water evaporates from the surface of the oceans leaving behind salts. As water vapor rises, it collects and is stored in clouds.
As water cools in the clouds, condensation occurs. Condensation is when gases turn back into liquids.
Condensation creates precipitation. Precipitation includes rain, snow, hail and sleet. The precipitation allows the water to return again to the Earth's surface.
When precipitation lands on land, the water can sink into the ground to become part of our underground water reserves, also known as groundwater.
Answer:
The final pressure of gas is 82.64 KNm⁻²
Explanation:
Given data:
Initial volume of gas = 180 cm³
Temperature of gas = 27°C
Initial pressure = 101 KNm⁻²
Final volume = 220 cm³
Final pressure = ?
Solution:
The given problem will be solved through the Boly's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
101 KNm⁻² × 180 cm³ = P₂
× 220 cm³
P₂ = 18180 KNm⁻². cm³/220 cm³
P₂ = 82.64 KNm⁻²
The final pressure of gas is 82.64 KNm⁻².
