Answer:
447.58 J
Explanation:
The change in internal energy is the difference between the heat absorbed and the work done due to gas expansion. The following variables are given in the problem:
Change in volume = ΔV = 2.0 L
External pressure = P = 0.93 atm
Work done due to gas expansion = W = P*ΔV = 2*0.93 = 1.86 L-atm
We can convert the work done from L-atm to J by using the conversion unit given in the question: 1 L-atm = 101.3 J. Thus:
Work done = 1.86*101.3 = 188.418 J
Change in Internal energy (ΔU) = heat absorbed (Q) - work done (W)
The heat absorbed is equivalent to 636 J. thus, the internal energy is:
ΔU = 636 - 188.418 = 447.58 J
The conclusion was that there must be space between the particles of an atom. The way he knew this is because while some of the radiation reflected off of the gold foil, other radiation went right through it.
A factory at a low elevation ships bags of popcorn to cities at high
elevations. The factory manager need to monitor the amount of air in each bag
because when the bags of popcorn are delivered into high elevation cities, it
will shrink due to the high pressure exerted by the surroundings towards the
bag. As the elevation increases, the pressure surrounding it also increases.
Chromium exhibits a wide range of possible oxidation states, where the +3 state is the most stable energetically. The +3 and +6 states are the most commonly observed in chromium compounds, whereas the +1, +4 and +5 states are rare.
Answer:
= 152.40 g
Explanation:
The equation for the reaction is;
Cu(s) + AgNO3 → Ag(s) + Cu(NO3)2
Mass of silver nitrate = 320.0 g × 0.75
= 240.0 g
Molar mass of silver nitrate = 169.87 g/mol
Therefore;
Moles of silver nitrate = 240.0 g/169.87 g/mol
= 1.413 moles
Mole ratio of Silver nitrate to silver metal = 1 : 1
Therefore, moles of silver metal = 1.413 moles
Hence;
Mass of silver metal = 1.413 moles × 107.868 g/mol
<u>= 152.40 g</u>