Answer:
One CME is produced every five days
Explanation:
Answer:
Density, mass of a unit volume of a material substance
Explanation:
Find the density of the plastic. if the density is less than that of water, it's going to float. If it's more than the density of water, then it's going to sink.
Answer:
SO₄²⁻(aq) +Sn²⁺(aq) +4H⁺ → H₂SO₃(aq) + Sn⁴⁺(aq) + H₂O
Explanation:
At first calculate the oxidation state of that element which undergoes oxidation as well as reduction.
for SO₄²⁻ the oxidation state of sulphur is +6 and H₂SO₃ the oxidation state of sulphur is +4
So balance equation is
(Reduction) SO₄²⁻ + 4H⁺+ 2e⁻ → H₂SO₃ + H₂O.........................................(1)
(oxidation) Sn²⁺ → Sn⁴⁺ + 2e⁻ .............................................................(2)
Adding equation 1 & 2
we get
SO₄²⁻(aq) +Sn²⁺(aq) +4H⁺ → H₂SO₃(aq) + Sn⁴⁺(aq) + H₂O
Answer:
-26.6kJ/mol
Explanation:
The dissolution of NH₄NO₃ is:
NH₄NO₃(aq) → NH₄⁺(aq) + NO₃⁻(aq)
To solve this question we need to find the heat released in the dissolution using the equation of coffee cup calorimeter:
Q = -m*S*ΔT
<em>Where Q is heat,</em>
<em>m is the mass of solution = 1.60g + 75.0g = 76.6g</em>
<em>S is specific heat of the calorimeter (4.18J/g°C)</em>
<em>And ΔT is change in temperature (25°C - 23.34°C = 1.66°C)</em>
<em />
The heat is:
Q = -76.6g*4.18J/g°C*1.66°C
Q = -531.5J = -0.5315kJ are released
The heat released per mole = Enthalpy for the dissolution is:
<em>Moles NH₄NO₃:</em>
1.60g * (1mol / 80.043g) = 0.0200mol
Enthalpy for the dissolution:
-0.5315kJ / 0.0200mol =
<h3>-26.6kJ/mol</h3>
