Answer: A
Explanation: Beach deposits and wind blown deposits generally show good sorting because the energy of the transporting medium is usually constant.
Convert moles to mass.
mass C = 0.2 mol * 12 g / mol = 2.4 g
mass H = 0.4 mol * 1 g / mol = 0.4 g
So mass left for O = 6 g – (2.4 g + 0.4 g) = 3.2 g
Calculating for moles O given mass:
moles O = 3.2 g / (16 g / mol) = 0.2 moles
Answer:
<span>0.2 moles O</span>
Answer:
C. The reaction rate at known reaction concentrations
Explanation:
The rate of a reaction is the measure of the speed of a chemical reaction. To find the rate constant of a reaction, the concentration of the reactants must be known.
- Reaction rate is directly proportional to the concentration of the reactants.
- The quantitative relationship between the rate of a reaction and the concentrations of reactants is expressed as the rate law.
- From this we can deduce the rate constant.
Answer:
129,66 g
Explanation:
Desde,
Número de moles = concentración * volumen
concentración = 2 M
volumen = 875 ml
Número de lunares = 2 * 875/1000
Número de lunares = 1,75 moles
Número de moles = masa / masa molar
masa molar de hidróxido de calcio = 74.093 g / mol
1,75 moles = masa / 74,093 g / mol
masa = 1,75 moles * 74,093 g / mol
masa = 129,66 g
The change in the internal energy of the gas in the cylinder is 763 J
From the first law of thermodynamics, the change in internal energy(U) of a system is equivalent to the difference between net heat transfer(Q) into the system and the net work done(W) on the system
The equation for the change in the internal energy from the first law of thermodynamics is:
ΔU = ΔQ - ΔW
ΔU = 875 J - 112 J
ΔU = 763 J
Learn more about the first law of thermodynamics here:
brainly.com/question/9614649
