Which of the following can effect the resistance of a wire?I. the length of a wire
II. the thickness of a wire
III. the temperature of a wire
I and II
I and III
II and III
I, II, and III
Answers
Answer:
l and lll
Explanation:
The longer the wire, the more resistance that there will be and heating a metal conductor makes it more difficult for electricity to flow through it.
Related Questions
What does the atomic mass describe?a. The mass of the protons in the atom b. The mass of the nucleus of the atom c. The mass of the neutrons in the atom d. The mass of the electrons in the atom
"Each value below represents a different aqueous solution at 25 °C. Classify each solution as acidic, basic, or?Are the following acidic, basic or nuetral? pOH=3.37 pOH=11.40 [h+]=3.8x10^-4 [h+]=5.8x10^-8 [OH-]=3.5x10^-12 [OH-]=6.6x10^-3 [h+]=1.0x10^-7 pOh=7 pH=5.11 pH=12.94"
A student determines that according to the reaction N2(g) + 3H2(g) --> 2NH3(g), if 34g of nitrogen gas is reacted with excess hydrogen, 41g of ammonia can be produced. When the actual reaction was complete, only 38g of ammonia formed. Determine the percent yield for the reaction.
Thewhich are represented by a single uppercase letter, or represented by an uppercase letter followedby a lowercase letter. This tells you the types of elements in the compound.
Answers
The sulfur (S) element of the periodic table is represented by the electron configuration .
The arrangement of electrons within the energy levels or orbitals of an atom is represented by electronic configuration. Sulfur has 16 electrons in its structure. The numbers in the electronic configuration represent the principal energy levels—1, 2, and 3—as well as the orbital—s or p—that the electrons are in.
Detail analysis of electron arrangement:
- The first energy level (n = 1) represents the presence of two electrons in the symbol
1s orbital.
- The symbol
indicates the presence of two electrons in the second energy level (n = 2) and the 2s orbital.
- The
symbol indicates the presence of 6 electrons in the second energy level (n = 2) and 2p orbitals.
- The third energy level, or
, refers to the presence of two electrons in the 3s orbital (n = 3).
stands for the third energy level (n = 3), and indicates that two of the three p orbitals hold two electrons.
When these electronic configurations are combined, the electron configuration of sulfur (S) is represented by .
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Count the number of electrons = 2+2+6+2+2= 14
So, it must be SILICON.
B) Weak electrolytes dissolve and partially dissociate in water providing charged ions to conduct electricity.
C) Weak electrolytes dissolve and completely dissociate in water providing charged ions to conduct electricity.
D) Weak electrolytes dissolve and does not dissociate in water providing no charged ions to conduct electricity.
Answers
Answer: B) Weak electrolytes dissolve and partially dissociate in water providing charged ions to conduct electricity.
Explanation: Weak electrolytes are those substances which do not dissociate completely when dissolved in water. They dissociate but then associate back and thus their dissociation is shown by an equilibrium sign. Example:
The charged species formed helps in the conduction of electricity.
Strong electrolytes are those substances which dissociate completely when dissolved in water. Their dissociation is shown by a forward arrow. Example:
The charged species formed helps in the conduction of electricity.
Answers
Answer:
Biosphere
Explanation:
This is because the biosphere is the category of life. This means that plants, animals, humans, and bacteria are all apart of the biosphere.
Answers
Fe³⁺ +e⁻ -> Fe²⁺ is the half reaction equation represents the reduction of an iron(II) ion
What is Reduction Reaction ?
When an element or a compound gain electron , decreasing its oxidation number is called reduced and the half cell reaction is called Reduction reaction.
Fe³⁺ +e⁻ -> Fe²⁺ , Option C
In this reaction the Iron is gaining electron and the charge is getting reduced from +3 to +2 .
Therefore this half reaction equation represents the reduction of an iron(II) ion.
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reduction of an iron(II) ion
Answer b
Answers
Answer:
Two
Step-by-step explanation:
There are two ways to determine the number sets of equivalent protons in a compound.
(a) By substitution
Replace each H with a different group and see if you get a different compound
For example, the six CH₃ H atoms are an equivalent set, because, if I replace any one of them, I will always get the same compound: 1-chloromethyl-4-methylbenzene (Fig. 1).
Similarly, the four aromatic H atoms are an equivalent set. If I replace any one of them, I will always get the same compound: 2-chloro-1,4-dimethylbenzene (Fig. 2).
Thus, there are two sets of equivalent protons in p-xylene.
(b) By symmetry
Two atoms are equivalent if one can be converted into the other by a symmetry operation on the molecule.
The methyl hydrogens can be interconverted by a combination of reflections about the AB and CD mirror planes and byrotations about the C-C bonds to the ring (Fig. 3).
Similarly, the four aromatic H atoms can be interconverted by a combination of reflections about the AB and CD mirror planes.
Again, we find two sets of equivalent protons.
Answers
7.00 g H2 ( 1 mol / 2.02 g ) = 3.47 mol H2
70.00 g N2 ( 1 mol / 28.02 g) = 2.50 mol N2
From the balanced reaction, we see that there is a 3 is to 1 ratio of the reactants. So, for every 3 moles of H2 we need 1 mole of N2. Given the amount of reactant, for 2.50 moles of N2 we need 7.5 moles of H2 which obviously we have a lesser amount. Hydrogen is the limiting reactant.