The photoelectric effect occurs when light shines on a metal. ... Light of any frequency will cause electrons to be emitted.
Answer:
4.82 g
Explanation:
To solve this problem we'll use the <em>definition of molarity</em>:
- Molarity = moles / liters
We are given the volume and concentration (keep in mind that 100mL=0.100L):
- 0.825 M = moles / 0.100 L
Now we <u>calculate the number of NaCl moles required</u>:
Then we convert 0.0825 NaCl moles into grams, using its molar mass:
- 0.0825 mol * 58.44 g/mol = 4.82 g
I would conclude that star a is closer than star b
Answer:
C
Explanation:
C shows a mixture of CO2 and H2O, 2 compounds
<span>Moles of aluminum carbonate = Mass / Molar mass
= 47.6 g / 233.99 g molâ’1
=0.203 mol
To find moles of oxygen:
In each mole of the carbonate there are 9 moles of oxygen
And thus there are 9 Ă— 0.203 moles of oxygen in the given quantity.
= 1.83 moles of oxygen
Within one mole of oxygen, we have 6.022 x 10^23 atoms
Amount of atoms within 1.827 moles of oxygen = 1.83 x 6.022 x 10^23
= 1.10 x 10^24 atoms</span>
