Arrange the isotopes of sulfur and phosphorus in order of decreasing number of neutrons.Rank the isotopes from most to fewest neutrons. To rank items as equivalent, overlap them.
S-36
P-35
S-32
P-33
P-32
P-31
Answers
most S-36 and P-35(both have 20 neutrons) (36-16=20)(35-15=20)
P-33 (33-15=18neutrons)
P-32 (32-15=17 neutrons)
least S-32 and P-31 (both have 16 neutrons) (32-16=16)(31-15=16)
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1.Cheraw is a folk dance native to Mizoram. True or False?2.Neon is used in electric signs and fluorescent lamps .true or false?
Which reaction occurs most rapidly at standard conditions?H2(g) + I2(s) 2HI(g) Cu(s) + S(s) CuS(s) C6H12O6(s) + 6O2(g) 6CO2(g) + 6H2O(g) 5C2O42-(aq) + 2MnO4-(aq) + 16H+(aq) 10CO2(g) + 2Mn2+(aq) + 2H2O(l) Ag+(aq) + I-(aq) AgI2(s) NextReset
B. decomposition
C. double-replacement reaction
D. synthesis
Answers
Answer: Option (C) is the correct answer.
Explanation:
It is given that when an acid and a base form a salt and water.
For example,
Therefore, in this type of reactions there is exchange of ions between the two compounds hence, it is known as double-displacement reaction.
Thus, we can conclude that out of the given options the term an acid and a base form a salt and water describes an acid-base reaction.
Answers
Final answer:
All of the dots in a Lewis symbol represent the valence electrons of an atom. Valence electrons are responsible for the atom's chemical properties and can be determined by the group number of the element on the periodic table.
Explanation:
All of the dots in a Lewis symbol represent the valence electrons of an atom. Valence electrons are the electrons in the outermost energy level of an atom and are responsible for the atom's chemical properties. The number of valence electrons can be determined by looking at the group number (also known as the column number) of the element on the periodic table.
For example, oxygen (O) is in group 16, so it has six valence electrons. Its Lewis symbol would have six dots surrounding the elemental symbol.
Similarly, chlorine (Cl) is in group 17, so it has seven valence electrons. Its Lewis symbol would have seven dots surrounding the elemental symbol.
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Answers
D. 6 electrons
A single nitrogen atom has five electrons in its outer energy level to start, and will be most stable with an octet, or 8 electrons in its outer level.
Calculate the number of valence electrons of N2
N= 2x 5 = 10
N2 has a total of 10 valence electrons, to become stable each N atom needs 8 electrons.
So, therefore, 6 electrons would have to be a part of covalent bonds because they share 6 electrons in a triple bond.
B) 2HCL + Mg(OH)2 --> 2HOH + MgCl2
C) 2NaCl + H2SO4 --> Na2SO4 + 2HCl
D) Ca(OH)2 + Pb(NO3)2 --> Ca(NO3)2 + Pb(OH)2
I know the answer is A, but confused as to why that is. Can someone explain this for me? Thanks.
Answers
option a is the only option that has a change in oxidation sates. Fluorine goes from 0 to -1 indicating that it gained electrons (got reduced) while bromine goes from -1 to 0 indicating it loses electrons (got oxidized).
(2Br⁻→Br₂+2e⁻ and F₂+2e⁻→2F⁻).
I hope this helps. Let me know if anything is unclear.
Answers
Answer:chlorofluorocarbons (CFCs) could deplete Earth's atmospheric ozone layer, which blocks the sun's damaging ultraviolet rays. When the scientists reported their findings in 1974, CFCs were widely used as refrigerant gases and as propellants in aerosol sprays
Explanation:
Answers
For the given chemical reaction, 15 moles of sulfur are required to produce 15 moles of sulfur dioxide.
What is the balanced chemical equation?
A chemical equation can be defined as a representation of a chemical reaction in the form of symbols of the substances. A chemical equation consists of contributing reactants in the reaction, formed products, and their physical states.
The chemical equation in which the number of atoms of each element is equal on both sides of the equation is called a balanced chemical equation.
The law of conservation of mass follows by a balancing of a chemical equation therefore, the total mass of the elements on the reactant side must be equal to the total mass of elements on the product side.
Given, the chemical equation is: S + O₂ → SO₂
From the above equation, we can say that one mole of sulfur produces one mole of sulfur dioxide.
Given the moles of the sulfur dioxide = 15 moles
The moles of sulfur required to make 15 moles of sulfur = 15 moles
Therefore, 15 moles of sulfur are required for the given conditions.
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1 mole S ------------ 1 mole SO₂
? mole S ----------- 15.0 mole SO₂
S = 15.0 * 1 / 1
= 15 moles of S
hope this helps!