Answer: the answer is option 3. C
Explanation:
We first calculate the energy contained in one photon of this light using Planck's equation:
E = hc/λ
E = 6.63 x 10⁻³⁴ x 3 x 10⁸ / 590 x 10⁻⁹
E = 3.37 x 10⁻²² kJ/photon
Now, one mole of atoms will excite one mole of photons. This means that 6.02 x 10²³ photons will be excited
(3.37 x 10⁻²² kJ/photon) x (6.02 x 10²³ photons / mol)
The energy released will be 202.87 kJ/mol
Answer:
E. 6.9 E-7 M
Explanation:
0.10M 0.10M 0.10M
eq: S S 2S + 0.1
∴ Ksp = 6.9 E-9 = [Mg2+][F-]² = (S)(2S+0.1)²
if we compared the concentration ( 0.1 M ) with the Ksp ( 6.9 E-9 ); then we can neglect the solubility as adding:
⇒ Ksp = 6.9 E-9 = (S)(0.1)² = 0.01S
⇒ S = 6.9 E-9 / 0.01 = 6.9 E-7 M
Answer:
2Na + K₂S → 2K + Na₂S. "replacement reaction"
Explanation:
To balance the equation, you should apply the law of conservation of mass for the equations.
The law of conservation of mass states that the no. of each atom is equal in both sides (reactants and products).
So, the given equation is balanced as:
<em>2Na + K₂S → 2K + Na₂S.</em>
It is a replacement reaction that Na replace K in <em>K₂S.</em>
<em>That 2.0 moles of Na react with 1.0 mole K₂S to produce 2.0 of K and 1.0 mole of Na₂S.</em>
- The no. of all atoms is the same in both of reactants and products side.
<em>Na (2), K (2), and S (1).</em>
Answer:
Alright the answer would be B: Compound because Table sugar, granulated sugar, or regular sugar, refers to sucrose, a disaccharide composed of glucose and fructose. Which are compounds ^^ hope i helped
Explanation:
