Answer:
Explanation: Does any of this look right? To be honest I just looked it up.
Answer:
966.12 mmHg
Explanation:
-We apply Gay-Lussac's Law which holds that the pressure of a given gas is directly proportional to it's temperature(in Kelvins) for a constant volume:
Given that:
#We therefore substitute in the formula above to solve for the final pressure, P2:
Hence, is the new pressure inside the containe is 966.12 mmHg
Answer:
CaBr₂, CaO, FeBr₂, FeO
Explanation:
Per binary compound, there must be 1 cation (Ca²⁺, Fe²⁺) and 1 anion (Br⁻, O²⁻). The compound should have a charge of 0 (neutral). For this to occur, there sometimes needs to be more than one cation/anion present in the compound. Below I have included the math that displays why there are more ions necessary in some compounds.
CaBr₂
-----> Ca = +2 and Br = -1
-----> +2 + (-1) + (-1) = 0
CaO
-----> Ca = +2 and O = -2
-----> +2 + (-2) = 0
FeBr₂
-----> Fe = +2 and Br = -1
-----> +2 + (-1) + (-1) = 0
FeO
-----> Fe = +2 and O = -2
-----> +2 + (-2) = 0
Answer:
941.4 kPa
Explanation:
To solve this problem, we can use Boyle's Law, which states that:
"For a fixed mass of an ideal gas kept at constant temperature, the pressure of the gas is inversely proportional to its volume"
Mathematically:
where
p is the pressure of the gas
V is its volume
For a gas transformation, the equation can be rewritten as
where in this problem:
is the initial pressure
is the initial volume
is the final volume
Solving for p2, we find the final pressure:
Given that the mass of coffee in the cup = 140 g
Final temperature =
Initial temperature =
Let us assume the specific heat of coffee is equal to that of water = 4.184
Temperature change = T(final) - T(initial) = (20 - 75 )
=- 55
-Heat given out by coffee = heat absorbed by the surroundings
Heat released into the surroundings =-()
=
= 32,217 J