Explanation:
Gravitational potential energy
= mgh = (45kg)(9.81N/kg)(2m) = 882J.
Answer:
T = 3206.89 K
Explanation:
Given that,
Number of moles, n = 1.9 moles
Pressure, P = 5 atm
Volume, V = 100 L
We need to find the temperature of the gas. Let the temperature is T. We know that,
PV = nRT
Where
R is gas constant, R = 0.08206 L-atm/mol-K
Put all the values,

So, the temperature of the gas is 3206.89 K.
I think the b is right ( Saturated Alkyne)
Mole is the ratio of the mass to the molar mass of the substance and its unit is mol. The moles of isopropanol in the sample are 1. 31 moles.
<h3>What are moles?</h3>
Moles are the unit of measurement of the smallest entity of atoms, molecules, and compounds.
Given,
Mass of isopropanol (m) = 78. 6 g
Molar mass of isopropanol = 60. 1 g/mol
Moles of isopropanol is calculated as:

Therefore, moles of isopropanol are option b. 1.31 moles.
Learn more about moles here:
brainly.com/question/7210732