Answer:
2 tall 2 short.
Explanation:
If 1 is tall, and 1 is short, 50% would be tall, and the other 50% would be short.
the first is hydroxide. I believe d is the second one but I'm not 100% positive so you may want to get a second opinion
Runoff (Hope this helped)
Molar mass SiO2 = 28 + 32 = 60
<span>so moles sand = 3.4 x 10-7 / 60</span>