Answer:
4
Explanation:
Since there are 3 carbons on the left side, make the coefficient of CO2 equal to 3.
Also, since there are 8 hydrogen on the left side, make the coefficient of H2O equal to 4.
This means there are 3(2)+4=10 oxygen atoms on the right, making the coefficient of O2 equal to 5.
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I think it’s B because I just know
Answer:
Ca3(PO4)2- Increase in solubility
Barium hydroxide- increase in solubility
Magnesium carbonate- increase in solubility
Copper II sulphide- increase solubility
Lead II bromide- increase solubility
CuI - increase solubility
Explanation:
Calcium phosphate solubility is pH dependent. At lower pH, calcium phosphate is more soluble in water while at pH above 8.5, the solubility of calcium phosphate decreases markedly.
For Barium hydroxide and magnesium carbonate,decreasing the pH will increase the solubility of the compound.
For copper II sulphide,decreasing the pH will lead to a greater solubility. Also, lead II bromide is ordinarily insoluble in water but it's solubility increases with decreasing pH.
CuI is insoluble in water but soluble in dilute hydrochloric acid.
Answer:
We colect 11.2 L of gas
Explanation:
Let's apply the Ideal Gases Law to solve this:
P . V = n . R .T
where P and T in STP are 1 atm and 273°K
The thing is n which means the number of moles for the gas.
As we know, 1 mol of anything has 6.02x10²³ particles so
6.02x10²³ are occupied in 1 mol of gas
3.00x10²³ are occupied in (3.00x10² .1) / NA = 0.500 moles
So let's go to the formula:
1 atm . V = 0.500m . 0.082 . 273K
V = (0.500m . 0.082 . 273K) / 1atm
V = 11.2L
There is a rule, which says that 1 mol of gas in STP, occupies 22.4L so, since we have half a mole, it will occupy half the volume
