CHEMISTRY HIGH SCHOOL

Which of the following is true about bases?a. They help to build up cells.
b. They release hydroxide ions in solution.
c. They tend to decrease the pH of a solution.
d. They have a sharp or sour taste. explain

Answers

Answer 1
Answer: B, the release hydroxide ions in solution

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What is the mass, in grams, of 6.82 L of nitrogen monoxide at STP? R = 0.0821 L atm / mol K

Where does oxidation occur in an electrochemical cell?(1) at the cathode in both an electrolytic cell and a voltaic cell
(2) at the cathode in an electrolytic cell and at the anode in a voltaic cell
(3) at the anode in both an electrolytic cell and a voltaic cell
(4) at the anode in an electrolytic cell and at the cathode in a voltaic cell

Answers

Option No. 1 at the cathode in both an electrolytic cell and a voltaic cell

Negative ion arrives at the anode, attracted by electrostatic forces, where they lose electrons. Loss of electrons is defined as oxidation.

The reverse process occur at the negative electrode, where positive ions pick up electrons. They are reduced.

Answer : The correct option is, (3) at the anode in both an electrolytic cell and a voltaic cell.

Explanation :

As we know that there are two types of cell which are, electrolytic cell and electrochemical cell or galvanic cell.

Electrolytic cell : It is defined as the cell in which the chemical reaction occurs by passing of the current from external source.

In this electrolytic cell, the oxidation occurs at anode which is a positive electrode and reduction occurs at cathode which is a negative electrode.

Electrochemical cell : It is defined as the cell in which the chemical reaction occurs with the production of electric potential difference between the two electrodes.  It is also known as voltaic cell.

In this cell, the oxidation occurs at anode which is a negative electrode and reduction occurs at cathode which is a positive electrode.

From this we conclude that, the oxidation occurs at the anode in both an electrolytic cell and a voltaic cell.

Hence, the correct option is, (3) at the anode in both an electrolytic cell and a voltaic cell.

Which of the following is represented in the highest percentage by volume in dry air?a. Carbon dioxide
b. Oxygen
c. Hydrogen
d. Nitrogen

Answers

Answer: The correct answer is Option d.

Explanation:

Dry air is composed of a mixture of gases like argon, oxygen, nitrogen, carbon dioxide and many other gases present in trace amount.

The percentage of these gases by volume in dry air is:

Carbon dioxide = 0.03%

Argon = 0.93%

Oxygen = 20.95%

Nitrogen = 78.09%

Hydrogen = Trace amounts

From the above percentage values, we can easily say that nitrogen has the highest percentage by volume in dry air. Hence, the correct option is d.
nitrogen is the highest percent of 93%

Rank standard molar entropy without a data table? Without referring to a data table, rank the following compounds by standard molar entropy (highest to lowest). I can do it with a data table but not sure how to proceed without. Thank you for your help. N2(g) H2(g) C2H4(g)

Answers

I think the correct order from most entropy to least entropy is C2H4, N2, and H2. My reasoning is that C2H4 has the biggest number of microstates which means that it will have the most entropy since it. I then based N2 and H2 from there weights (which indicates size) since the larger something is the more microstates it is likely to have. I hope that helps. Let me know if anything is unclear or if you want me to add more detail.

What is the molar mass of ph

Answers

30.973762 u ± 0.000002 u Hope this Helps >>

Nuclei with ______ numbers of neutrons and protons are more stable.

Answers

Nuclei with the same number of neutrons and protons are more stable

___wastes are solid, liquid, or gas wastes that are toxic, flammable, corrosive, reactive, or radioactive.a. solid
b. hazardous
c. domestic

Answers

Answer: Option (b) is the correct answer.

Explanation:

When a substance is used and thrown away which can lead to damage in the environment as it may [produce some toxic or hazardous gases is known as a hazardous waste.

These wastes can be solid, liquid or gaseous.

For example, batteries, kerosene, garden chemicals etc are all hazardous waste.

A domestic waste is a waste thrown by a household which may include paper, vegetable waste, cardboard, yard clippings etc.

Thus, we can conclude that hazardous wastes are solid, liquid, or gas wastes that are toxic, flammable, corrosive, reactive, or radioactive.
It's hazardous m8. :P
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