Answer:
CrO2
Explanation:
Firstly, we need to find the mass of the oxygen in the oxide. That is 4.94 - 3.06 = 1.88g
Now, we will need to get the number of moles and this can be obtained by dividing the masses by the atomic mass units. The atomic mass units of chromium and oxygen are 52 and 16 respectively. The division is obtained as follows:
Cr = 3.06/52 = 0.06
O = 1.88/16 = 0.12
We then divide by the smallest, which is that of the chromium.
Cr = 0.06/0.06 = 1
O = 0.12/0.06 = 2
The simplest formula is the empirical formula and it is thus given by CrO2
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.
The correct answer is that organic compounds get their name from its association with living organisms. The word "organic" means living. That's how they are related and that's how organic compounds get their name. I hope this answer helped you.
Answer:
Incomplete question. You didn't give the volume of HNO3
