Which of the following solutions contains the greatest number of ions?. . 1) 200.0 mL of 0.10 M iron (III) chloride. 2) 800.mL of 0.10 M sucrose

Answers

Answer 1

Answer: The number of ions is determined by multiplying the given volume and the molarity of the solution. The product is multiplied to the number of ions when the solution dissociates. In this case:

1. 200.0 mL of 0.10 M iron (III) chloride = 0.2*0.1* 4 = 0.08
2. 800.mL of 0.10 M sucrose = 0.8 * 0.1 * 1 = 0.08

The two solutions have the same number of ions.

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How many significant figures are in the measurement 0.020 km?

Answers

2 significant figures (if that means #s) .02

Final answer:

The measurement 0.020 km has two significant figures, which are '2' and '0' after '2'.

Explanation:

The number of significant figures in a number refers to the digits that carry meaning and contribute to the accuracy of the measurement. In the given measurement of 0.020 kilometers, there are two significant figures. These are the digits '2' and '0' located immediately after the '2'.

The zeros before these numbers, such as in '0.020 km', are not significant figures because they simply indicate the position of the decimal point, and they do not contribute to the precision of the measurement.

Learn more about Significant Figures here:

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Which of the following is not required in a chemical reaction?a.
atomic nuclei
c.
products
b.
reactants
d.
energy

Answers

atomic nuclei:
The nucleus is the small, dense region consisting of protons and neutrons at the center of an atom. The atomic nucleuswas discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.

When an oxygen atom forms an ion, it gains two electrons. What is the electrical charge of the oxygen ion? A.
+2

B.
-1

C.
+1

D.
-2

Answers

D. 2- youre adding two negative charges to a neutral element

The electrical charge of the oxygen ion is -2.

Describe and explain the trends in reactivity in different groups of the periodic table, using your knowledge of electronic structure. [6 mark]

Answers

Metal period- Reactivity Gets smaller as you move from left to right.
Group- Reactivity gets bigger as you move down a group.

What power is generated by converting the kinetic energy of falling water to electricity ?A. Geothermal
B. Photovoltaic
C. Hydrophobic
D. Hydroelectric

Answers

Answer: Option (D) is the correct answer.

Explanation:

When kinetic energy of falling water is converted to electricity then the generated power is called hydroelectric power.

In a hydroelectric plant, a reservoir is used to store water in a dam. This dam is located on a river. When water is released from this reservoir then it flows through the turbine. As a result, this turbine spins and activates a generator which produces electricity.

Thus, we can conclude that hydroelectric power is generated by converting the kinetic energy of falling water to electricity.

i believe it would be D. Hydroelectric

When a chemical reaction is in equilibrium, a. the reaction is proceeding at its maximum rate.
b. there is no net change in the amount of substrates or products.
c. the reaction has stopped.
d. there are equivalent amounts of substrates and products.

Answers

Answer: b. there is no net change in the amount of substrates or products.

Explanation:

The reactions which do not go on completion and in which the reactant forms product and the products goes back to the reactants simultaneously are known as equilibrium reactions.

Equilibrium state is the state when reactants and products are present but the concentrations does not change with time.

$A\rightleftharpoons B$

For a chemical equilibrium reaction, equilibrium state is achieved when the rate of forward reaction becomes equals to rate of the backward reaction.

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