A chemist records properties of two substances, A and B. Then, she mixes the substances together and records her observations.
Product
Properties
Substance A Substance B
5 g
5 g
White
Clear
Mass
Color
Milky
Form
Powder
Warm liquid cold bubbly liquid
The chemist claims that a new substance is formed when Substances A and B are mixed.
Which three observations support the claim?
O A Bubbles are produced.
B
There is a temperature change.
O c. The substances can easily be separated again.
OD. The product has properties of Substances A and B.
O E. The mass of the product is not equal to the sum of the masses of Substances A and B.

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

What atom has the largest atomic radius