The graph shows the volume of a gaseous product formed during two trials of a reaction. A different concentration of reactant wa
s used during each trial, whereas the other factors were kept constant. Which of the following statements explains which trial has a lower concentration of the reactant?
A) Trial X, because the final volume of product formed is lower than Trial Y.
B) Trial X, because this reaction was initially fast and later stopped completely.
C) Trial Y, because the reaction was initially slow and later stopped completely.
D) Trial Y, because the volume of product formed per unit time is lower than Trial X.
Trial Y, because the volume of product formed per unit time is lower than Trial X.
Explanation:
The rate of reaction depends on the amount of reactants present. Now remember that the rate of reaction is either measured as the rate of disappearance of reactants or as the rate of appearance of products.
In this case, we consider the rate of reaction as the rate of appearance of products per unit time. Reading off from the graph, it is quite easy to observe that the volume of product formed per unit time for trial Y is lower than that of Trial X. Since we have earlier agreed that the rate of reaction depends on the initial concentration of reactants. It follows that the reason for the lower volume of product formed per unit time for trial Y is because of a lower initial concentration of the reactants in trial Y. Hence the answer.
Adding CaCl₂ to water and maple syrup will rise the temperature of both of them.
Knowing that:
Specific heat of maple syrup = 2.01 J/g.°C
.
Specific heat of water = 4.18 J/g.°C.
Which means that the energy needed to rise the temperature by 1.0 °C of 1.0 g of water (4.18 J) is twice as that needed to rise the temperature by 1.0 °C of 1.0 g of water (2.01 J).
So, the temperature of maple syrup will be higher than that of water when CaCl₂ is added to both of them.
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment. ... Protons and neutrons are bound together to form a nucleus by the nuclear force.
Answer: Continental climates are classified by whether that fluctuates a lot. Hot summer, Cold winters and Little rainfall are all characteristics of Continental Climates