Answer:
i think multipling 30 to the 40
30 × 40 = 1200ppt
<span>1. The number of valence electrons increases as you go from left to right across a period. This is because the number of electrons increases, so another electron will be added to the outer shell.
2. Group 6A elements will have 6 valence elecrons, while Group 2A elements only have 2, therefore Group 6A elements have more valence electrons that Group 2A elements.
3. Fluorine has a smaller atomic size than the other halogens (Cl, Br, I), so its valence electrons are nearer to its nucleus. This means that the attractive forces are stronger, so when another electron (from another atom) draws near the F atom, it is more likely that the electron will be pulled toward the nucleus and react with the F atom</span>.
You didn’t include options but if you want the element. 0-17 has 8 protons and 9 neutrons
Im sorry i can only do the last one the answer might be a, d, e. Im so sorry if im wrong
Answer:
720 mL
Explanation:
To answer this problem we'll use the <em>definition of molarity</em>:
- Molarity = moles / liters
With that in mind we can <u>calculate the volume in liters</u>:
- 0.25 M = 0.18 moles / liters
Finally we<u> convert liters to mL</u>:
Thus 720 mL of 0.25 M NaOH would have 0.18 moles of NaOH.
