Answer:
c. 1.5 mol
Explanation:
- Firstly, we need to calculate the no, of moles of 39.0 grams of calcium fluoride.
n = mass / molar mass = (39.0 g) / (78.07 g/mol) = 0.499 mol ≅ 0.5 mol.
- CaF₂ ionized in water as:
<em>CaF₂ → Ca⁺² + 2F⁻.</em>
Every 0.1 mole of CaF₂ is ionized to 3 ions (1 ion of Ca⁺² and 2 ions of F⁻).
<em>So, 0.5 mol of CaF₂ will contain (3 x 0.5 mol = 1.5 mol) of ions.</em>
Thus, the right choice is "c. 1.5 mol".
Answer:
carbohydrates, proteins and fats.Explanation:
Answer: maybe do some math that will help you
Explanation:
The reaction for the production of NO₂ is as follows:
2 NO + O₂ → 2 NO₂
Then, we use stoichiometry to solve the problem. The solution is as follows:
8 molecules NO₂ (1 molecule O₂/2 molecules NO₂)(0.75) = 3
Therefore, it will need <em>3 molecules of oxygen</em> for a 75% yield.
