A radical is a group of atoms that remains bonded together and behaves as a single atom in a chemical reaction. a. True
b. False
Answers
Answer:
A radical is a group of atoms that remains bonded together and behaves as a single atom in a chemical reaction. True (a.)
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What gas is removed from inhaled air
Which of the following statements about the mole is FALSE? a. The size of a mole of atoms has a reasonable mass. b. A mole of a monatomic element corresponds to one Avogadro's number of atoms. c. One mole of a monatomic element has a mass equal to its atomic mass expressed in grams. d. One mole of water contains 1/2 mole of oxygen atoms. e. None of the above
The equation below shows the decomposition of lead nitrate. How many molecules of PbO are produced when 11.5 g NO2 is formed?2Pb(NO3 )2 (s) → 2PbO(s) + 4NO2 (g) + O2 (g)
What percent by mass of each chloroform molecule is composed of chlorine?
b. Sr-1(ClO3)+2
c. Sr2CIO3
d. Sr(ClO3)2
Answers
Answer:
The answer to your question is letter d. Sr(ClO₃)₂
Explanation:
Data
Reactants HClO₃ and Sr(OH)₂
This is a neutralization reaction because the reactants are a base (Sr(OH)₂) and an acid (HClO₃).
The products in a neutralization reaction are always water and a salt.
Balanced chemical reaction
Sr(OH)₂ + HClO₃ ⇒ H₂O + Sr(ClO₃)₂
Answers
(Side Note: Isotopes are atoms of the element that have the SAME number of protons but different number of neutrons, so they have different mass numbers. Also average atomic mass is the average of all the isotopes in an element - this number is the one that is shown on the periodic table of elements, not mass number).
Let me show you how to do this..
For the isoptope 63Cu I will first need to convert it's percentage of abundance into a decimal, because we don't use the percentage to multiply. 69.97% -> 0.6997. Now I am going to take it's atomic mass 62.9300 and multiply that by 0.6997.
62.9300*0.6997=44.0321
Now we still need to find calculate this for the isotope 65Cu. To convert 31.03% to a decimal I will just move the decimal point two places to the left, to get 0.3103.
So I am going to take this and multiply it by 64.9200 the atomic mass of the isotope 65Cu.
64.9200*0.3103=20.1447
Add the two of these to get the average atomic mass..
20.1447 + 44.0321=64.1768
Answers
Answer:
HNO3 ->NO3²- + H+
Concentration of H+ ions= 0.0032M
pH = - log[ H+]
= - log (0.0032)
= 2.49
pH + pOH = 14
pOH = 14 - pH
= 14 - 2.49
= 11.51
pH = 2.49 and pOH = 11.51
Hope this helps.
Answers
Base: Soap, oven cleaner, ammonia
The bases are cleaners, and the acids are fruits, bases have a bitter taste, and acids have a sour taste. Hope this helps!
Sulfuric Acid
Hydroflouric Acid
Phosphoric Acid
Three bases
Sodium Hydroxide
Calcium Hydroxide
Potassium Hydroxide
Sulfuric Acid is used as a catalyst in the alkalation reaction section. The alkalation unit in a refinery produces alkylate which is used to give distilled raw gasoline a higher octane rating.
Hydroflouric Acid is also used in a different type of alkalation unit which is currently being phased out due to Hydroflouric Acid dangerous nature.
Phosphoric Acid is used in industrial cooling towers to aid in controlling scale inside piping in cooling water systems.
Sodium Hydroxide is also used in crude oil refinery settings to aid in neutralizing low pH systems in the refinery process .
Calcium hydroxide is used to eliminate moisture in propane systems in the alkalation process.
Potassium hydroxide is used to clean refinery vessel used in the crude refining process.
Answers
When hydrogen atoms combined to form helium, this process is known as nuclear fusion.
What is nuclear fusion?
Nuclear fusion can be described as when two or more nuclei fuse to produce a single heavier nucleus. In this reaction, the matter is not conserved due to some of the mass of the nuclei is converted to energy.
For nuclear fusion, the nuclei should be brought together reaction to occur. Each star in the universe, including the sun, is shine due to nuclear fusion. They form huge amounts of energy through this process.
In the core of the Sun, hydrogen nuclei are being transformed into helium. This is known as nuclear fusion. It occurs when four hydrogen atoms fuse into each helium atom. During this process, some of the mass of hydrogen nuclei is converted into energy.
Nuclear fusion where hydrogenatoms combined to form helium can be represented as:
Learn more about nuclear fusion, here:
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(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
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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.