Response:The ethanol percentage is 0.1093%
Explanation:
As given:
t = time = 10 s
I = current = 320 mA
F = Faraday's constant = 96485.3365 C mol⁻¹
n = number of electrons transferred = 4
Molecular weight of ethanol is 46 g/mol
Question: What is the percent (by volume) of ethanol in the driver's breath, %E =?
First, calculate the ethanol mass:
The moles of ethanol:
Applying the ideal gas law formula:
Here:
T = 26°C = 299 K
P = 1 atm
Substituting in the values:
The percentage of ethanol:
%
A system is considered at equilibrium when the concentrations of reactants and products stay constant over time. Reactions that do not reach completion, where reactants can form products while products can revert back to reactants simultaneously, are categorized as equilibrium reactions. The nature of equilibrium is dynamic, meaning reactions continue to occur, with the rate of the forward reaction equating to that of the reverse reaction. In this state, even though both reactants and products coexist, their concentrations do not vary.
Answer:
B
Explanation:
Flammable substances contain chemicals that react with flames, thus making it their chemical property, particularly when they encounter other materials that cause a reaction.
Answer:
C
Explanation
My teacher mentioned that, for instance, Florida tends to be warm, while Central America can have both hot and cold temperatures, and a jacket isn't necessary. I don't recall many details.
The solution to your inquiry yields P = 17.73 atm. Explanation: The volume V is 250 ml, equivalent to 0.25 liters (L), with a mass of 3.4 g and a temperature of 45°C, which converts to 318°K. We utilize the ideal gas law PV = nRT for the calculations.
