Answer:
A, is a girl balancing on her hands, a red arrow is pointing up and is the same length as an arrow pointing down.
Explanation:
vvEven she was still on her feet the force thats pulling her down is gravity and when you have figure the force that makes it easier so when the 2 arrows are the same size that means the force is balenced
please brailiest please i need one more
(x1,y1) (x2,y2)
(32,15) (212,135)
y = mx + b
m=(y2-y1)/(x2-x1)
m=.66667
y = .66667*(x) + b
Plug in #s to test for b value
15 = .66667*(32) + b
b = -6.334
y = mx + b
y = .6667*(x) + (-6.334)
F = .6667*(F) + (-6.334)
F = (.6667*(F) = -6.334
(F - .6667F) = -6.334
F(1 - .6667) = -6.334
F = -19
ThermX = F @ -19 degrees
Brainliest please!
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:
Robert Boyle discovered Boyle's law, which Denotes that the volume and pressure of a gas are proportionally related. He dispelled the four-element theory of Aristotle, which states that everything is made up of earth, water, air, and fire.
Answer:
An antibody can help fight against pathogens, has four polypeptides, two heavy chains and two light chain, antigen binding and biological activity mediation.
