Oak trees:)
Have a great day
Answer : Phenolphthalein is pink in an aqueous solution having a ph of 12.
Explanation :
Phenolphthalein is an acid-base indicator. It is a colorless solution which remains colorless in acidic solution and changes to pink in basic solution.
An acidic solution has a pH of less than 7 whereas a basic solution has a pH of greater than 7.
The pH transition range for phenolphthalein is between 8-10. Than means when the pH is greater than 8, the color of the solution starts to change.
Among the given options, the only option that shows a basic solution is option (4) . Therefore we can say that phenolphthalein would be pink in a solution having a pH of 12.
<span>If the gasses participates in the reaction, and they under the same temperature and pressure, ratio of their volumes is equal to ratio of the moles of these gasses in the reaction.
N2 (g) + 3H2 (g)-------> 2NH3 (g)
from reaction 3 mol 2 mol
from the problem 4.5L x L
x=4.5*⅔=9/3=3 L<span>
</span></span>
Non metals could be:
pencils
books
paper
metals could be:
pens
Tablet/Phone
Answer:
there are 7. 505 x 1022 atoms in 3.5 grams of silicon.
Explanation:
So, 1 mole of silicon will have a mass of 28.0855 g and the number of atoms will be 6.022 x 1023. Therefore, there are 7. 505 x 1022 atoms in 3.5 grams of silicon.