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.
Sodium bicarbonate is commonly known as baking soda. The scientific name is NaHCO3. Baking soda is an alkaline compound found in crystalline form in nature.
Hope this helped
Brainliest is appreciated
Good luck
~ Emmy
We use the ideal gas equation in order to calculate the temperature of the system. It is expressed as follows:
PV=nRT
where P is pressure, V is volume, n is the number of moles, R is the universal gas constant and T is the temperature.
15 atm (.1 L) = 0.5 mol (0.08206 L-atm / mol-K) T
T = 36.56 K
Hope this answers the question. Have a nice day.
Answer:
x=-1
Explanation:
1. Simplify brackets.
2x+3×6x=−20
2. Simplify 3×6x to 18x.
2x+18x=−20
3. Simplify 2x+18x to 20x.
20x=−20
4. Divide both sides by 20.
x=−1