Answer:
Kinetic energy is the energy that an object has because of its motion. The molecules in a substance have a range of kinetic energies because they don't all move at the same speed. As a substance absorbs heat the particles move faster so the average kinetic energy and therefore the temperature increases.
NH₃(aq) + HNO₃(aq) = NH₄NO₃(aq)
Ammonia is a weak base. The reaction of ammonia and nitric acid is a neutralization reaction.
NH₃ + H₂O = NH₄⁺ + OH⁻
HNO₃ + H₂O = H₃O⁺ + NO₃⁻
OH⁻ + H₃O⁺ = 2H₂O (neutralization)
Answer:
well the first one is something i can get but the second one is something you can google up but here's he first one i tried:
It represents 50, 55, and 65.
3: It effected the speed as if it was heaver it would be harder to pick up and faster than a slow light object like a feather or a lego
alright i tried hard as i can, sorry if i end up putting in the wrong
awnser
sleep well ^-^
First, we write out a balanced equation.
HA <--> H(+) + A(-)
Next, we create an ICE table
HA <--> H+ + A-
[]i 0.40M 0M 0M
Δ[] -x +x +x
[]f 0.40-x x x
Next, we write out the Ka expression.
Ka = [H+][A-]/[HA]
Ka = x*x/(0.40-x)
However, because Ka is less than 10^-3, we can assume the amount of dissociation is negligible. Thus,
Assume 0.40-x ≈ 0.40
Therefore, 1.2x10^-6 = x^2/0.40
Then we solve for the [H+] concentration, or x
x=6.93x10^-4
Next, to find pH we do
pH = -log[H+]
pH = -log[6.93x10^-4]
pH = 3.2
Answer:
The atomic mass of an atom is the number of protons plus neutrons.
Fact: In case you get it confused with atomic number, atomic number is the number of protons in the atom.
Explanation: It could have been electrons plus neutrons since electrons equals protons but electrons aren't stable which is why it is protons and neutrons.