Answer: The pH of the solution will decrease by 1 unit.
Explanation:
Let say the hydronium ion concentration of a solution is 0.001
pH = - log [H+]
= -log 1.0 x 10^3 = 3
if the hydronium ion concentration is increased by 10 , that is: 0.001 x 10 = 0.01
pH = -log [1.0 x 10^2]
= 2
Therefore, the pH is reduced by 1 unit when the hydronium ion concentration is increased by a factor of 10.
Answer:
The dog weighs 29,88 lbf at the top of the Everest
Explanation:
The difference between mass and weight is that <em>mass is the amount of matter in a material</em>, while <em>weight is a measure of how the force of gravity acts upon that mass.</em>
So mass remains constant always, while weight depends on gravity. At the same time, on Earth, gravity varies slightly depending on the distance to the center of Earth. At the top of Mountain Everest, gravity has a value of 32,042 ft/s2 (normally we use 32, 174 ft/s3 as the average gravity value of Earth) so the weight of the dog will be:
W=m*g.............
<em>Note that normally 1 lbm </em><u><em>has a weight</em></u><em> of 1 lbf because 1 lbf = 32,174 lbmft/s^2 (the average value of gravity in Earth)</em>
Answer:
= 654.5 g NaNO3
Explanation:
Molarity = Moles/ volume
Volume = 3.5 L
Molarity = 2.2 M
Therefore;
Moles = Molarity × volume
= 3.5 L × 2.2 M
= 7.7 moles
But 1 mole of NaNO3 is 85 g/mol
Mass of NaNO3 = 85 g/mole × 7.7 moles
= 654.5 g NaNO3
Answer:
The analogy that best describes is "The planets go around the sun."
Explanation:
The best analogy that suggests that electrons moves round the nucleus in an atom is the Bohr model. According to Neil Bohr, Based on Rutherford's model, he suggested that the extra nuclear part consists of electrons.
These electrons are in the spherical orbits called shells or energy levels around the nucleus.
The nucleus is the tiny massive center of the atom.
Transition of electrons takes place from one level to another.