Given the balanced equation representing a reaction:Fe2O3 + 2Al--> Al2O3 + 2Fe
During this reaction, the oxidation number of Fe changes from
(1) +2 to 0 as electrons are transferred
(2) +2 to 0 as protons are transferred
(3) +3 to 0 as electrons are transferred
(4) +3 to 0 as protons are transferred
Answers
let oxidation state of Fe = x
2x + (-2 * 3) = 0
2x - 6 = 0
2x = +6
x = +3
Oxidation state of Solid Iron
Fe
the rule is that the oxidation state of an uncombined element is zero
Redox pertains to electron transfer and not proton transfer thus your answer is OPTION 3 (+3 to 0 as electrons are transferred)
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(2) CO2 and CH4 (4) H2O and CH4
Answers
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Period 2, Group 1
b
Period 7, Group 2
c
Period 6, Group 17
d
Period 1, Group 18
Answers
Answer:
D Period 1, Group 18
Explanation:
it's helium
it's top right corner of the periodic table
Answers
Answer:
The number of protons in the nucleus of an atom is its atomic number, which is unique to each element.
Explanation:
Answer:
It's the same as the atomic number e.g. Oxygen has the atomic number 8 so it has 8 protons in the nucleus.
A)It is made of matter and contains twenty-four molecules.
B)It is an element made of three types of atoms.
C)It is an atom made up of carbon, hydrogen, and oxygen.
D)It is a compound made of twenty-four total atoms of three different elements.
Answers
Answer:
The correct answer is D)It is a compound made of twenty-four total atoms of three different elements
Explanation:
Glucose (C₆H₁₂O₆) is a molecule (not an atom neither an element, so the options B and C are not completely correct). It is composed by three different elements (oxygen: O, carbon: C and hydrogen: H), and it has twenty-four atoms in its molecule: (6 x C) + (12 x H) + (6 x O)= 24. So, the option D is the one that best describes glucose.
C) it is made up of carbon, hydrogen, and oxygen
D) it is a compound made of twenty-four total atoms of three different elements
they are both right but I would go with D
B. protons; neutrons
C. neutrons; electrons
Answers
Answer: Option (B) is the correct answer.
Explanation:
Atomic mass is defined as the summation of total number of protons and neutrons present in an element.
On the other hand, atomic number means the total number of protons present in an element.
For example, atomic number of sodium is 11 and number of neutrons present in it are 12.
Hence, atomic mass of sodium = no. of protons + no. of neutrons
= (11 + 12) amu
= 23 amu
Therefore, we can conclude that the atomic mass of an element can be approximated by adding the number of protons plus the average number of neutrons.