<u>Q</u><u>U</u><u>E</u><u>S</u><u>T</u><u>I</u><u>O</u><u>N</u><u> </u><u>:</u>
- highest energy level for lithium
<u>A</u><u>N</u><u>S</u><u>W</u><u>E</u><u>R</u><u> </u><u>:</u>
- There are 2 electrons on the first energy level and 1 electron on the second. Explain that the first energy level can only have 2 electrons so the next electron in lithium is on the next (second) level. Explain that neon has 10 protons and 10 electrons.
Answer:
Mass = 159.8 g
Explanation:
Given data:
Mass of HNO₂ = ?
Moles of nitrous acid = 3.4 mol
Solution:
Formula:
Number of moles = mass / molar mass
We will rearrange this formula.
Mass = number of moles × molar mass
Molar mass of nitrous acid = 47 g/ mol
Mass = 3.4 mol × 47 g/ mol
Mass = 159.8 g
To calculate the amount of the compound in the units of grams, we need to first obtain for the molar mass of the compound. We calculate as follows:
MgCl2 = <span>24.31 + (2 x 35.45) = 95.21 g/mol
</span><span>340 g MgCl2 ( 1 mol / 95.21 g ) = 3.57 mol MgCl2
Hope this answers the question. Have a nice day.</span>
Answer:
Potassium (K) and Lithium (Li) for the fist one i cant see the second
Explanation:
