Bonjour,
increasing temperature.
for many solids dissolved in liquid water, the solubility increases with temperature.
Core, radiative zone, convective zone, photosphere, chromosphere, corona
Answer:
a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
really depending on what weight you are referring to but thats the number 1 on dictonary
Answer:
a: 1
b: 4.5x10⁻⁴
c: 1.125x10⁻⁶
[H₃O⁺] = 0.000859M
Explanation:
As HNO₂ is a weak acid, its equilibrium in water is:
HNO₂(aq) + H₂O(l) ⇄ H₃O⁺(aq) + NO₂⁻(aq)
Equilibrium constant, ka, is defined as:
ka = 4.5x10⁻⁴ = [H₃O⁺] [NO₂⁻] / [HNO₂] <em>(1)</em>
Equilibrium concentration of each specie are:
[HNO₂] = 0.00250M - x
[H₃O⁺] = x
[NO₂⁻] = x
Replacing in (1):
4.5x10⁻⁴ = x × x / 0.00250M - x
1.125x10⁻⁶ - 4.5x10⁻⁴x = x²
0 = x² + 4.5x10⁻⁴x - 1.125x10⁻⁶
As the quadratic equation is ax² + bx + c = 0
Coefficients are:
a: 1
b: 4.5x10⁻⁴
c: 1.125x10⁻⁶
Now, solving quadratic equation:
x = -0.0013 → False answer, there is no negative concentrations.
<em>x = 0.000859</em>
As [H₃O⁺] = x; <em>[H₃O⁺] = 0.000859M</em>
I hope it helps!
Answer:
32 mol
Explanation:
Step 1: Write the balanced equation.
C₄H₁₀ + 6.5 O₂ → 4 CO₂ + 5 H₂O
Step 2: Establish the appropriate molar ratio.
The molar ratio of C₄H₁₀ to O₂ is 1:6.5
Step 3: Calculate the moles of oxygen needed to burn 5.0 mol of butane.
We use the molar ratio established in the previous step.
