The following chemical formulas would require a prefix when is it named, Cl207
Answer:
22.6g/mL
Explanation:
density = mass / volume
given mass of object : 142.5040
volume of object : not given however we are told that when placed inside of a cylinder with 25 mL of water the water level rises to 31.3 mL
31.3 - 25 = 6.3
So the water level rose by 6.3 mL meaning that the object has a volume of 6.3 mL
Now to find the density.
Recall that density = mass / volume
mass = 142.5040 g and volume = 6.3 mL
so density = 142.5040g / 6.3 mL = 22.6 g / ml
We can find the number of moles in the balloon using the ideal gas law equation
PV = nrT
where
P - pressure - 2.20 atm
V - volume - 5.10 L
n - number of moles
r - universal gas constant - 0.08206 LatmK⁻¹mol⁻¹
T - temperature in Kelvin - 27.1 °C + 273 = 300.1 K
substituting the values in the equation
2.20 atm x 5.10 L = n x 0.08206 LatmK⁻¹mol⁻¹ x 300.1 K
n = 0.456 mol
number of moles of gas is 0.456 mol
Answer:
827 mL
Explanation:
To answer this question we use the <em>definition of Molarity</em>:
Molarity = mol / L
[Cl⁻] = mol Cl⁻ / L
Now we calculate the moles of Cl⁻ present in 42.0 g of MgCl₂⋅6H₂O:
Molar mass of MgCl₂⋅6H₂O = 24.3 + 2*35.45 + 6*18 = 203.2 g/mol
moles of Cl⁻ = 42.0 g MgCl₂⋅6H₂O ÷ 203.2 g/mol * = 0.4134 mol Cl⁻
Finally we use the definition of molarity to calculate the volume:
0.500 M = 0.4134 mol Cl⁻ / xL
xL = 0.827 L = 827 mL
Answer:
Definition: a statement based on something one has seen, heard, or noticed
Explanation:
In my own words it would be something you would have seen or heard.
For example you add salt to a glass of water and stirred it. An observation would be that you watched the salt dissolve in the water.