Answer:
All of the above
Explanation:
(I'm assuming you meant to put Australia in the options)
Australia is in the southern hemisphere and has its summer in December etc. and Winter in July etc.
China is in the northern hemisphere and has its summer in July etc and Winter in December etc.
Assuming the other part of the question is;
A solid mixture consists of 44.2g of KNO3 (potassium nitrate) and 7.8g of K2SO4 (potassium sulfate). The mixture is added to 130. g of water. (Assume KNO3 has a solubility of 14 g solute/ 100 g water)
Answer;
26 g
Solution;
-X g of KNO3/ 130 g water= 14 g of KNO3/ 100 g water
X= 18.2 g (this is the amount of solute that dissolves at 0 degrees C in 130 g water).
if you have 44.3g of KNO3 in 130 g of water at 0 degrees celsius and only 18.2 can dissolve then
44.2g - 18.2g = 26 g left undisolved which gives you the amount that would crystallize
<u>Answer:</u> The number of electrons in given amount of silver are
<u>Explanation:</u>
The number of moles is defined as the ratio of the mass of a substance to its molar mass.
The equation used is:
......(1)
We are given:
Mass of silver = 7.0 g
Molar mass of silver = 107.87 g/mol
Putting values in equation 1:
According to the mole concept:
1 mole of a compound contains number of particles.
Number of electrons per atom of silver = 47
So, 0.065 moles of silver will contain = number of electrons
Hence, the number of electrons in given amount of silver are