Answer: False
Explanation: Endothermic means it absorbs heat energy.
Atomic number is the number of an Adams protons
Answer:
d.miscible
Explanation:
If two liquids are completely miscible, no interfacial tension exists between them.
Interfacial tension is the force of attraction between between the molecules of a fluid that are in contact. This tension forms thick skin at the interface.
In miscible liquids, in which one liquid completely dissolves in another, there is no interfacial tension.
Interfacial tension does not allow miscibility of fluids as the tension between the interface is too great.
- When there is a condition of no interfacial tension, two liquids are miscible.
- When there is immiscibility, interfacial tension exists between two fluids and this invalidates option A.
So, if two liquids are miscible, there is no interfacial tension between them.
Answer: The net change in the atoms is the conversion of a neutron to a proton, turning Carbon (6 protons) into Nitrogen (7 protons).
Explanation:
Carbon-14, generated from the atmosphere, has 6 protons and 8 neutrons. That's where the 14 comes from, called the mass number, is the sum of protons and neutrons (6+8=14).
Carbon-14 is radioactive and decays by beta decay. That means one of its neutrons spontaneously turns into a proton, an electron, and a neutrino, according to:
After that, the atom has 7 protons and 7 neutrons, maintaining its mass number but changing its atomic number from 6 to 7, turning into Nitrogen.
Ga₂O₃ + 2NaOH + 3H₂O = 2Na[Ga(OH)₄]
[Ga(OH)]⁻ + 3e⁻ = Ga + 4OH⁻
n(Ga)=It/(zF)
I=0.200 A
t=40.0 min=2400 s
z=3
F=96485.33 Kl/mol
n(Ga)=0.200*2400/(3*96485.33)=0.00166 =1.66*10⁻³ mol