Mass of lead (II) chromate is 51 g. The molecular formula is 
and its molar mass is 323.2 g/mol
Number of moles can be calculated using the following formula:
Here, m is mass and M is molar mass.
Putting the values,
Therefore, number of moles of lead (II) chromate will be 0.1578 mol.
Answer:
Explanation:
Hello,
In this case, in terms of the heat, mass, heat capacity and change in temperature, we can analyze thermal changes as:
In such a way, we compute the required change in temperature as shown below:
Such change in temperature is positive indicating an increase in the temperature as the involved heat is positive, in means that heat was added to increase the temperature.
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1 litre of water is = 55.5 moles of water.
water is H2O
so, in water:
moles of oxygen = 55.5
moles of hydrogen = 2 x 55.5 = 111
Now, 1 mole each of <span>CH4, NH3, H2S, and CO2 are added:
For CH4:
moles of C = 1
moles of H = 4 x 1 = 4
For NH3:
moles of N = 1
moles of H = 3 x 1 = 3
For H2S:
moles of H = 2 x 1 = 2
</span>moles of S = 1
<span>
For CO2:
</span>moles of C = 1
moles of = 2 x 1 = 2
<span>
Now, add the total moles of each atom:
Hydrogen = 111 + 4 + 3 +1 = 119 moles
Oxygen = 55.5 + 2 = 57.5
Carbon = 1+1 = 2
Sulfur = 1
nitrogen = 1
</span>
The specific heat of aluminum, iron and copper is 0.897 J/g °C, 0.452 J/g °C and 0.385 J/g °C respectively.
The formula that relates specific heat capacity and change in temperature is as follows:
E=m×c×ΔT
Here, E is heat, m is mass, c is specific heat and ΔT is change in temperature.
On rearranging,
c=\frac{E}{m\times \Delta T}
Thus, change in temperature is inversely proportional to change in temperature. Change in temperature will be more for the element with low value of specific heat which is Cu in this case.
Since, the initial temperature is same for all the samples thus, Cu will reach the highest temperature.
