Answer:
C
Explanation:
because valence electrons are located at the last energy level
It's all three of the answers
Answer:
quarters
a computer that shows pictures of atoms on screen
candy with letters on one side
Explanation:
Answer: The equation for the reaction that goes with this equilibrium constant is ![5.56\times 10^{-10}=\frac{[CH_3COOH]}{[CH_3COO^-]\times [H^+]}](https://tex.z-dn.net/?f=5.56%5Ctimes%2010%5E%7B-10%7D%3D%5Cfrac%7B%5BCH_3COOH%5D%7D%7B%5BCH_3COO%5E-%5D%5Ctimes%20%5BH%5E%2B%5D%7D)
Explanation:
Here
donates a proton and thus behaves as an acid and forms
which is called as the conjugate base of 
The dissociation constant of acids is given by the term
and the dissociation constant of bases is given by the term
and is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios.
for
:
![K_a=\frac{[CH_3COO^-]\times [H^+]}{[CH_3COOH]}](https://tex.z-dn.net/?f=K_a%3D%5Cfrac%7B%5BCH_3COO%5E-%5D%5Ctimes%20%5BH%5E%2B%5D%7D%7B%5BCH_3COOH%5D%7D)

![K_b=\frac{[CH_3COOH]}{[CH_3COO^-]\times [H^+]}](https://tex.z-dn.net/?f=K_b%3D%5Cfrac%7B%5BCH_3COOH%5D%7D%7B%5BCH_3COO%5E-%5D%5Ctimes%20%5BH%5E%2B%5D%7D)
![5.56\times 10^{-10}=\frac{[CH_3COOH]}{[CH_3COO^-]\times [H^+]}](https://tex.z-dn.net/?f=5.56%5Ctimes%2010%5E%7B-10%7D%3D%5Cfrac%7B%5BCH_3COOH%5D%7D%7B%5BCH_3COO%5E-%5D%5Ctimes%20%5BH%5E%2B%5D%7D)
The equation for the reaction that goes with this equilibrium constant is ![K_b=\frac{[CH_3COOH]}{[CH_3COO^-]\times [H^+]}](https://tex.z-dn.net/?f=K_b%3D%5Cfrac%7B%5BCH_3COOH%5D%7D%7B%5BCH_3COO%5E-%5D%5Ctimes%20%5BH%5E%2B%5D%7D)
Answer:
a) 250 N
b) 50 N
c) 5000 J
d) 4
e) 3.33
Explanation:
Given that weight of piano (
) = 1000 N, distance moved by pulley (
) = 5 m and the rope used (
) =20 m
a) The effort applied (
) if it was an ideal machine is:

b) If the actual effort = 300 N
The force to overcome friction = actual effort -
= 300 - 250 = 50 N
c) Work output = 
d) ideal mechanical advantage (IMA) = 
e) Input force = 300 N, Therefore:
actual mechanical advantage =
/ input force = 1000 / 300 = 3.33