I think it's just water right..?
The electron affinity increases from left to right
Ideal gas law: PV = nRT
P-pressure
V-volume
n-number of moles(m/M)
R-constant
T- temperature
State given info:
V=10L
T=298k
P=203kPa
R=8.31(only for kPa, for pressure at atm use 0.08206)
Sub in:
(203kPa)(10L)=n(8.31)(298)
Rearrange:
n= (203)(10) / (8.31)(298)
n = 0.819745mol in gas sample
Answer:
C. Potassium-19
.
Explanation:
Hello!
In this case, since isotopes are known be atoms of the same element with equal atomic number but different mass number, we can consider the case of carbon which has two natural occurring ones, carbon-12 and carbon-13 whereas carbon-12 has the greatest abundance. However, isotope notation may take two forms:
1. Symbol of the element followed by a dash indicating the mass number of the isotope, for instance: C-12, K-39, and so on.
2. Name of the element followed by a dash indicating the mass number of the isotope, for instance: Carbon-12, Potassium-39, and so on.
In such a way, the improper isotope notation is C. Potassium-19
, considering that A should be K-39 because atomic symbol of potassium is K, not k.
Best regards!
Molecules move the fastest in gas
