Answer:
Explanation:
Heat can transfer between objects in two different ways. Generally, heat will travel from places of higher heat to places of lower heat.
The first is conduction. This is when the object being heated and releasing heat are in direct contact. Not as much heat is lost in this process, since the thermal energy has nowhere else to go except for the object it is touching. An example would be putting a kettle on a hot stove, but it could also be grabbing a cold pole with your relatively warm hands.
The second is convection. This is where heat is radiated into the air, and thus, transferred by the air, to another object. The actual heat that you feel is actually electromagnetic waves, and its transfer from an object is called electromagnetic radiation. Convection is the heat you feel from a near fire or a space heater. This is also why wind is present in our atmosphere.
There is also radiation. This is caused from the burning or breaking down of a substance. This might come from the sun.
I hope I did enough to deserve the 45 points!
Answer:
A
Explanation:
that should be the answer
Explanation:
Mass of solute = 10.0 g
mass of solvent(water) = m
Volume of solvent( water) = v = 100.0 mL
Density of water= d =
Mass of solution(M) = Mass of solute + mass of solvent
M = 10.0 g + 100.0 g = 110.0 g
Volume of the solution = V = 113 mL
Density of the solution = D
The density of the solution is 0.9734 g/ml.
Moles of phosphoric acid =
Moles of water =
Mole fraction of phosphoric acid =
Mole fraction of water =
Moles of phosphoric acid = 0.1020 mol
Volume of the solution = V = 113 mL = 0.113 L ( 1 mL = 0.001 L)
Molarity of the solution :
Moles of phosphoric acid = 0.1020 mol
Mass of solvent(water) = m =100.0 g = 0.100 kg ( 1 g = 0.001 kg)
Molality of the solution :
Answer: 40.68 kPa
Explanation:
Given that,
Original volume of gas V1 = 21.7 mL
Original pressure of gas P1 = 98.8 kPa
New volume of gas V2 = 52.7 mL
New pressure of gas P2 = ?
Since pressure and volume are given while temperature is constant, apply the formula for Boyle's law
P1V1 = P2V2
98.8 kPa x 21.7 mL = P2 x 52.7L
2143.96 kPa L = 52.7 L x P2
P2 = 2143.96 kPa L / 52.7 L
P2 = 40.68 kPa
Thus, the new pressure of the gas is 40.68 kPa.