The frog population in the Amazon basin varied. Every 500 years there was a mutational change leading to speciation. In between the population remainedthe same with no observable changes. The pattern of macroevolution is that there is a change in species orientation and adaptation to change
Answer:
A. Adding D
Explanation:
Based on Le Chatelier's principle, a chemical reaction will reach equilibrium when the rate of the forward reaction is equal to the rate of the backwards (reverse) reaction.
Adding more reactants will cause the equilibrium to shift to the right and form more products in order to reach equilibrium again.
While adding more products will shift the equilibrium to the left and form more reactants in order to reach equilibrium again.
In the given question, we need the equilibrium to shift to the left and form more reactants. This means that we will need to add more products.
Therefore, we will need to add either C or D.
Applying this to the choices, we will find that the correct choice is A.
Hope this helps :)
2H2O --> 2H2 + O2
The mole H2O:mole O2 ratio is 2:1
Now determine how many moles of O2 are in 50g: 50g × 1mol/32g = 1.56 moles O2
Since 1 mole of O2 was produced for every 2 moles of H2O, we need 2×O2moles = H2O moles
2×1.56 = 3.13 moles H2O
Finally, convert moles to grams for H2O:
3.13moles × 18g/mol = 56.28 g H2O
D) 56.28
The element that has been oxidized is Al ( Answer A)
Explanation
if the oxidation number of an element is greater in the product side than the reactant side then the element has lost the electrons . This mean that the element has been oxidized.
Al is oxidized because it move from oxidation state Zero(0) in reactant side to oxidation state 3⁺ in product side.
This implies that Al loses 3 electrons.
