O is a blood donor
AB receiver
Answer:
Mass percent of silicon = 46.75% (Approx)
Explanation:
Given:
Mass of silicon = 0.389 g
Mass of silicon dioxide = 0.832 g
Find:
Mass percent of silicon
Computation:
Mass percent of silicon = Mass of silicon / Mass of silicon dioxide
Mass percent of silicon = [0.389 g / 0.832 g]100
Mass percent of silicon = 46.75% (Approx)
Hey there!:
It is a solid at room temperature.
Take a look at the structure of the compound. It has 3 rings total, two of which are phenyl rings, 3 methyl groups and a pentyl group while there is only one OH. That is a lot of non-polar groups for just one polar group. This is why it is sparingly soluble in MeOH at RT, it really is not a very polar molecule (the general rule of thumb is 5 C's for every polar group for the molecular to be considered polar, this of course is a generalization).
I hope that helps.
Phenolphthalein turn pink in basic solutions.it turn colourless in acid solution.
Hence options(1)is correct