Answer:
0.4 M
Explanation:
The process that takes place in an aqueous K₂HPO₄ solution is:
First we <u>calculate how many K₂HPO₄ moles are there in 200 mL of a 0.2 M solution</u>:
- 200 mL * 0.2 M = 40 mmol K₂HPO₄
Then we <u>convert K₂HPO₄ moles into K⁺ moles</u>, using the <em>stoichiometric coefficients</em> of the reaction above:
- 40 mmol K₂HPO₄ * = 80 mmol K⁺
Finally we <em>divide the number of K⁺ moles by the volume</em>, to <u>calculate the molarity</u>:
- 80 mmol K⁺ / 200 mL = 0.4 M
Answer:I believe it’s because of the volcanos making up the ring
Explanation:
Answer:
regular Coke is denser than diet Coke. Each can of regular Coke has a mass of about 384 g. and diet coke has about 370 g.
Answer:
Solution of isopropanol is 10.25 molal
Explanation:
615 g of isopropanol (C3H7OH) per liter
We gave the information that 615 g of solute (isopropanol) are contained in 1L of water. We need to find out the mass of solvent, so we use density.
Density of water 1g/mL → Density = Mass of water / 1000 mL of water
Notice we converted the L to mL
Mass of water = 1000 g (which is the same to say 1kg)
Molality are the moles of solute in 1kg of solvent, so let's convert the moles of isopropanol → 615 g . 1mol / 60g = 10.25 moles
Molality (mol/kg) = 10.25 moles / 1kg = 10.25 m
When 2C2H6 (g) + 7 O2 (g) ⇒ 4CO2 (g) + 6H2O (L) is the balanced equation for this reaction:
So from the equation, 2 mol of C2H6 gives → 4 mol of CO2
So the molar ratio between C2H6 & CO2 is
2 mol C2H6:4 mol CO2 we can make it:
1 mol C2H6: 2 mol Co2
So when we have 5.3 mol of C2H6 how many moles of CO2 then
the moles of CO2 = 5.3 * 2 mol (CO2) / 1 mol (C2H6)
= 10.6 mol