Answer:
m = 29.6 grams
Explanation:
Given that,
Number of moles = 0.540
The molar mass of manganese = 54.93 g/mol
We know that,
Number of moles = given mass/molar mass
So, the required mass of the Manganese is equal to 29.6 grams.
Answer:
There are 6 carbon, 12 hydrogen, and 2 oxygen.
Explanation:
The numbers after each element tell you how many molecules there are!
H2O
for example has 2 Hydrogens and 1 Oxygen
Salt can dissolve in water because it is an ionic compound. The Na⁺ and Cl⁻ ions get solvated by the water molecules and leave the surface of the crystal;
The formula of ethanol is CH₃CH₂OH. Ethanol can dissolve in water because its OH group can form strong hydrogen bonds to the water molecules.
25.9 kJ/mol. (3 sig. fig. as in the heat capacity.)
<h3>Explanation</h3>
The process:
.
How many moles of this process?
Relative atomic mass from a modern periodic table:
- K: 39.098;
- N: 14.007;
- O: 15.999.
Molar mass of :
.
Number of moles of the process = Number of moles of dissolved:
.
What's the enthalpy change of this process?
for . By convention, the enthalpy change measures the energy change for each mole of a process.
.
The heat capacity is the least accurate number in these calculation. It comes with three significant figures. As a result, round the final result to three significant figures. However, make sure you keep at least one additional figure to minimize the risk of rounding errors during the calculation.
<u>Answer:</u> The final volume of the gas is 1250 mL
<u>Explanation:</u>
To calculate the amount of work done for an isothermal process is given by the equation:
W = amount of work done for expansion process = -123.3 J = -1.217 L.atm (Conversion factor: 1 L.atm = 101.33 J)
Work done for expansion process is taken as negative
P = pressure = 783 torr = 1.03 atm (Conversion factor: 1 atm = 760 torr)
= initial volume = 71.1 mL = 0.0711 L (Conversion factor: 1 L = 1000 mL)
= final volume = ?
Putting values in above equation, we get:
Hence, the final volume of the gas is 1250 mL