What is the mass of KCl that must dissolve in 200 grams of water at 60°C to make a saturated solution? * 23 g
45 g
90 g
104 g

A sample of CO2 (g) and NaCl (s) are subjected to pressure. How will the solubility of both samples change? *

The solubility of CO2 will increase and the solubility of NaCl will decrease
The solubility of CO2 will decrease and the solubility of NaCl will increase
The solubility of CO2 will remain the same and the solubility of NaCl will increase
The solubility of CO2 will increase and the solubility of NaCl will remain the same

A solution of NH4Cl is currently saturated. If you add 10 more grams at a constant temperature, what will happen to the concentration of the solution? *

It will decrease
It will increase
It will remain the same

ef

Explanation:

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b