Molar mass Chlorine ( Cl ) = 35.45 g/mol
hope this helps!
Answer:
Evaporation from the hydrosphere provides the medium for cloud and rain formation in the atmosphere. The atmosphere brings back rainwater to the hydrosphere. The atmosphere provides the geosphere with heat and energy needed for rock breakdown and erosion. The geosphere, in turn, reflects the sun's energy back into the atmosphere.
Explanation:
Aluminum Al2713 has an atomic molar mass of 27 grams per mole.
Al has 13 protons (hence number 13) and it most common isotope 14 neutrons for a total mass of 27 amu. ( The 13 electrons add no measurable mass to the atom)
Take the grams and divide by the molar mass
= 2 moles
Answer:
We should fill the acetylene tank to a pressure of 100 atm
Explanation:
Step 1: Data given
Volume tank 1 = 7.00 L
Tank 1 is filled with oxygen and has a pressure of 125 atm
Volume tank 2 = 3.50 L
Step 2: The balanced equation
2 C2H2 + 5 O2 → 4 CO2 + 2 H2O
Step 3: Calculate the pressure of acetylene
p(oxygen) * V(Oxygen) = n(Oxygen) * R * T
p(Acetylene) * V(Acetylene) = n(Acetylene) * R * T
We can assume both tanks are at the same temperature, so we can write this as followed:
p(Oxygen)* V(Oxygen) / p(Acetylene)*V(Acetylene) = n(Oxygen) / n(Acetylene)
⇒with n(Oxygen) / n(Acetylene) = 5/2
⇒with p(Oxygen) = 125atm
⇒V(Oxygen) =7L
⇒V(Acetylene) = 3.5L
⇒ this gives us: (125 * 7) / (P(Acetylene) * 3.5) = 5/2
p(Acetylene) = 100 atm
We should fill the acetylene tank to a pressure of 100 atm
Answer:
The process will be spontaneous above 702 K.
Explanation:
Step 1: Given data
- Standard enthalpy of the reaction (ΔH°): 308 kJ/mol
- Standard entropy of the reaction (ΔS°): 439 J/mol.K
Step 2: Calculate the temperature range in which the process will be spontaneous
The reaction will be spontaneous when the standard Gibbs free energy (ΔG°) is negative. We can calculate ΔG° using the following expression.
ΔG° = ΔH° - T × ΔS°
When ΔG° < 0,
ΔH° - T × ΔS° < 0
ΔH° < T × ΔS°
T > ΔH°/ΔS°
T > (308,000 J/mol)/(439 J/mol.K)
T > 702 K
The process will be spontaneous above 702 K.
