What is the mass, in grams, of 0.00948\,\text {mol}0.00948mol0, point, 00948, start text, m, o, l, end text of phosphoric acid?
gulaghasi [49]
Answer:
m = 0.929 grams
Explanation:
We have,
Number of moles of phosphoric acid is 0.00948
It is required to find the mass of phosphoric acid.
The number of moles in a given molecule is given by :
m is mass and M is molecular mass
The molecular formula of phosphoric acid is . Its molecular mass is :
So,
So, the mass of phosphoric acid is 0.929 grams.
Balanced equation:
<span>2 HCl + 1 Ca(OH)</span>₂<span> = 1 CaCl</span>₂<span> + 2 H</span>₂<span>O
</span>
hope this helps!
Answer:
B
Explanation:
i think leter B it because
Answer:
false all producers are at the top of food web
Answer:
The metal surface becomes more positive as electrons are lost from it.
Explanation:
Let us note that photoelectric effect refers to a phenomenon in which electrons are ejected from a clean metal surface irradiated with light of appropriate frequency. This photon must possess a frequency above the threshold frequency of the metal and its energy must exceed the work function of the metal. When these conditions are met, electrons are emitted from a clean metal surface, having a constant kinetic energy as long as the frequency of the incident photon remains constant.
However, as photoelectric effect progresses and electrons are lost from the metal surface, the metal surface becomes more positive. The more positive the surface, the greater the attraction of the positive surface for the emitted electrons. This reduces the kinetic energy of the emitted photons even though the frequency of incident photons is held constant.