Answer:
She needs 1.19 moles of potassium hydroxide.
Explanation:
Being the molar mass of the elements:
- K= 39 g/mole
- O= 16 g/mole
- H= 1 g/mole
then the molar mass of potassium hydroxide is:
KOH= 39 g/mole + 16 g/mole + 1 g/mole= 56 g/mole
Being the mass of one mole of a substance, which can be an element or a compound, you can apply the following rule of three: if 56 g of KOH are present in 1 mole, 66.48 g of KOH in how many moles of the compound are they?

moles of KOH= 1.19
<u><em>
She needs 1.19 moles of potassium hydroxide.</em></u>
A:- sn(s) => Sn +2(0.24 M) + 2e-
B:- Sn +2 (0.87 M) +2e- => Sn(s)
solution will become more concentrated and solution B become less concentrated
Sn(s)+ Sn +2(0.87 ) ----> Sn(s) + Sn +2(0.24)
E = Eo - 0.0592 / 2 * log [ (0.24 / 0.87 ) ]
E = 0.0 - 0.0592 / 2 * log ( 0.275)
( n=2 two electrons are transferred)
E = -0.0296 * ( - 0.560)
E = 0.0165 volts
Answer:
In the primary visual cortex, simple cells are one of two physiological categories of cells. They have receptive fields that are made up of elongated, contiguous On and Off subregions that inhibit each other.