Mathematical formula of Ideal Gas Law is PV=nRT
where: P-pressure,
V-volume
n-number of moles; m/MW
T-Temperature
m-mass
d-density ; m/V
MW-Molecular Weight
R- Ideal Gas constant. If the units of P,V,n & T are atm, L, mol & K respectively, the value of R is 0.0821 L x atm / K x mol
Substituting the definitions to the original Gas equation becomes:
d= P x MW / (RxT)
Solution : d= .90atm x 28 g/mol (CO) / 0.0821Lxatm / mol x K x 323 K
d = 25.2 g / 26000 mL
d = .0.00096 g/mL is the density of CO under the new conditions
The Law of Conservation of Mass states that matter cannot be created nor destroyed. It can only be transformed from one state or substance to another. This means that this law applies to both physical and chemical changes. In physical changes, the substance before and after the phase change still has the same mass. In chemical changes, the mass of reactants will always have the same mass of products and by-products.
Answer:
Enthalpy change = 333.3 J
Explanation:
Given data:
Volume of helium = 11.2 dm³ or 11.2 L
Temperature = 100 °C (100+273= 373 K)
Enthalpy change = ?
Solution:
Normal temperature of room = 20°C (20+273 = 293 K)
one mole of gas occupy volume = 22.4 L
ΔT = final temperature - initial temperature
ΔT = 373K - 293K
ΔT = 80K
Number of moles of gas = 11.2 L/22.4 l
Number of moles of gas = 0.5 mol
Enthalpy change = nRΔT
Enthalpy change = 0.5 mol × 8.3j/mol.k ×80 K
Enthalpy change = 333.3 J
Answer:
The symbol that represent a salt is CaCl2
Explanation:
The CaCI2 is the calcium chloride that an organic compound now a salt having a chemical formula i.e. CaCI2. Also it is non-color cyrstalline solid at the room temperature also it is highly soluble in the water
Therefore as per the given situation the symbol that represent a salt is CaCI2
This is the answer and the same is not provided in the given options
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