Answer:
14 moles
Explanation:
For an Ideal gas,
PV = nRT...................... Equation 1
Where P = Pressure, V = Volume, n = number of mole, R = Molar gas constant.
make n the subject of the equation
n = PV/RT.................. Equation 2
Given: P = 14.297 atm, V = 22.9 L = 22.9 dm³, T = 12 °C = (12+273) K = 285 K.
Constant: R = 0.082 atm.dm³/K.mol
Substitute these values into equation 2
n = (14.297×22.9)/(285×0.082)
n = 327.4013/23.37
n = 14.009
n ≈ 14 moles
A. K+, OH-
B. C6H5CO+, OH-
C. NH4+, Cl-
D. Mg++, 2 NO3-
Everything has 1 except for the Nitrate ion in D, which has 2
Answer:
300 centavos
Explanation:
De la pregunta anterior, se obtuvieron los siguientes datos:
Potencia (P) = 2500 W
Tiempo (t) = 8 horas
Costo de operación =?
A continuación, convertiremos 2500 W a KW. Esto se puede obtener de la siguiente manera:
1000 W = 1 KW
Por lo tanto,
2500 W = 2500 W × 1 KW / 1000 W
2500 W = 2,5 KW
Por tanto, 2500 W equivalen a 2,5 KW
A continuación, determinaremos la energía consumida. Esto se puede obtener de la siguiente manera: Potencia (P) = 2,5 KW
Tiempo (t) = 8 horas
Energía (E) =?
E = Pt
E = 2,5 × 8
E = 20 KWh
Finalmente, determinaremos el costo de operación. Esto se puede obtener de la siguiente manera:
1 KWh = 15 centavos
Por lo tanto,
20 KWh = 20 KWh × 15 centavos / 1 KWh
20 KWh = 300 centavos
Por lo tanto, costará 300 centavos tener un radiador de 2500 W encendido toda la noche (8 horas).
Answer: Cr203
Explanation: chromium(|||) oxide Is the compound of the formula Cr203. It's one of the principle oxides of chromium and used as a pigment.
Answer: Option (c) is the correct answer.
Explanation:
A physical model is defined as a model which represents how atoms are bonded together and structure of a molecule.
Physical model shows the three dimensional structure of a molecule. Physical models helps to easily understand and visualize the configuration, single bonds, double bonds and total atoms within a molecule.
Thus, we can conclude that given structure of carbonic acid best describes a physical model.