Hey :)
Ernest Rutherford produced the nuclear model of the atom
In 1909 Ernest Rutherford designed an experiment to test the plum pudding model
In the experiment, positively charged alpha particles were fired at thin gold foil. Most alpha particles went straight through the foil
This evidence led Rutherford to suggest a new model for the atom, called the nuclear model
Hope this helps :)
Spring a has more potential energy then spring b
Synthetic cathinone can be made in small amounts by creating a chemical reaction through the mixing of pseudoephedrine with regular household items.
<h3>What is cathinone?</h3>
Cathinone is an alkaloid drug obtained from a shrub plant (<em>Catha edulis</em>) and is equivalent to Akovaz (ephedrine).
The cathinone can also be artificially designed by using a pseudoephedrine medical drug.
Synthetic cathinone can be artificially produced in order to obtain this substance for medical use.
Learn more about ephedrine here:
brainly.com/question/8947903
Answer:
4.39
Explanation:
Let's consider the following reaction at equilibrium.
2 NH₃(g) ⇄ 3 H₂(g) + N₂(g)
The concentration equilibrium constant (Kc) is the product of the concentration of the products raised to their stoichiometric coefficients divided by the product of the concentration of the reactants raised to their stoichiometric coefficients.
Kc = [H₂]³.[N₂]/[NH₃]²
Kc = (0.700)³.(0.800)/(0.250)²
Kc = 4.39