Answer:
KNO₃(s) + 35,1 kJ → K⁺(aq) + NO₃⁻(aq)
Explanation:
In the reaction:
KNO₃(s) → K⁺(aq) + NO₃⁻(aq)
The <em><u>heat absorbed</u></em> for the reaction (Because the temperature decreases) is:
Q = C×m×ΔT
Where C is specific heat (4,18J/g°C); m is mass (100g); ΔT is (30,0°C-21,6°C = 8,4°C)
Replacing:
Q = 4,18J/g°C×100g×8,4°C
<em><u>Q = 3511 J</u></em>
Now, moles of KNO₃ are:
10,1g×(1mol / 101g) = <em><u>0,1 moles.</u></em>
Heat of solution in kJ/mol is:
3,511 J / 0,1 mol = <em><u>35,1 kJ</u></em>
As the heat was absorbed for the reaction, right answer is:
<em>KNO₃(s) + 35,1 kJ → K⁺(aq) + NO₃⁻(aq)</em>
That means the reaction needs the heat to occurs.
I hope it helps!
Answer:
<em>The number of electrons in the outermost shell of an element is represented in the periodic table as the group number that element is situated in. ... the number of electrons in all shells of an element is represented in the periodic table as the element's atomic number.</em>
Explanation:
<em>thatdummyemily </em>
<em>hope this helps srry if it doesn't tho, but if it does help can u plz mark me brainlist</em>
Answer:
Number 3,Concentration of hydrogen ions in solution.
Brainliest would be appreciated :))
Answer:
Explanation:
When it comes to electron configuration and orbitals, it's important to first identify what exactly we are trying to identify. Below is a given example:
Looking at the periodic table, identify the alkali metal family on the periodic table, or group one elements:
Notice how each configuration has an exponent of 
, representative of a single electron in their s-orbital.
Answer:
CH4+2O2→CO2+2H2O
Moles of oxygen=3232=1
Moles of carbon dioxide=4422=0.5
Moles of water=1818=1
1 mole of methane reacts with 2 moles of oxygen to give 1 mole of CO2 and 2 moles of water so 0.5 mole of methane will be required which is equal to 0.5×16=8g.
Explanation:
8g
