What is the cloud of gases that forms around the nucleus of a comet called?a. coma
b. gas tail
c. dust tail
d. Giant Red Spo
Answers
The correct answer is A. cloud of gases that forms around the nucleus of a comet is called a coma. The coma is a dusty, fuzzy cloud around the nucleus of a comet. Other parts of a comet are the nucleus and the tail.
Answer:
giant red spo
Explanation:
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H2O has a mc021-1.jpgHvap = 40.7 kJ/mol. What is the quantity of heat that is released when 27.9 g of H2O condenses?A)60.00 kJ B)61.05 kJ C)63.09 kJ D)68.60 kJ
Answers
(1) CH3CH2CH2CH2CH2OH = n-pentanol (pentane-1-ol)
(2) CH3CH2CH2CH(OH)CH3 = 2-pentanol (pentane-2-ol)
(3) CH3CH2CH(OH)CH2CH3 = 3-pentanol (pentane-3-ol)
(4) CH3CH2CH(CH3)CH2OH = 2-methyl-1-butanol
(5) CH3CH2C(CH3)(OH)CH3 = 2-methyl-2-butanol
(6) CH3CH(OH)CH(CH3)CH3 = 3-methyl-2-butanol
(7) CH2(OH)CH2CH(CH3)CH3 = 4-methyl-1-butanol
(8) CH3CH(CH3)CH2CH2OH = 3-methyl-1-butanol
(9) CH3C(CH3)2CH2OH = 2,2-dimethyl-1-propanol
Ether isomers:
(1) CH3CH2CH2CH2-O-CH3 = methyl butyl ether
(2) CH3CH2CH2-O-CH2CH3 = ethyl propyl ether
(3) CH3CH(CH3)CH2-O-CH3 = methyl isobutyl ether
(4) CH3CH2CH(CH3)-O-CH3 = methyl sec-butyl ether
(5) CH3CH2-O-CH(CH3)CH3 = methyl isopropyl ether
B. It stops the products from being formed from the intermediate state.
C. It slows down the overall chemical reaction so it does not happen too quickly.
D. It provides reactants with sufficient energy for bonds to break and reform.
Answers
Answer: The description it provides reactants with sufficient energy for bonds to break and reform best explains the role of activation energy in a chemical reaction.
Explanation:
Activation energy is defined as the minimum amount of required energy so that a chemical reaction can initiate.
As a result, it provides the reactants with certain amount of energy so that they will get the necessary amount of energy to break their bond and then form new bonds.
Thus, we can conclude that the description it provides reactants with sufficient energy for bonds to break and reform best explains the role of activation energy in a chemical reaction.
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)
approximate molecular mass of this gas?
A 30 grams
B 40 grams
C 20 grams
D 48 grams
Answers
Answer:
30 grams
Explanation:
I got 40 wrong so I picked 30
Answer:
30 grams
Explanation:
I did the ck12
B. metalloid
C. nonmetal
D. noble gas
Answers
Starting from K- Potassium up to As-Arsenic are all metals, the three elements are special: Se-Selenium(Non-Metals),Br-Bromine(Halogens),Kr-Noble gas still part of the row but not classified as metal.
(2) 2 (4) 20