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const2013 [10]
3 years ago
7

Write the balanced equation for the burning of nonane, c9h20, in air.

Chemistry
1 answer:
Ivanshal [37]3 years ago
3 0
C9H20 + 14O2 --> 9CO2 + 10H2O
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Muscles need a stimulus from which to of the following to "tell" them contract? A. A muscle call B. The skeleton C. A nerve cell
kompoz [17]
The answer is C a nerve cell 
4 0
3 years ago
When 150. g zinc sulfide are burned in excess oxygen, 68.5 g of zinc oxide are actually produced, along with sulfur dioxide. Det
Bumek [7]

%yield = 54.6%

<h3>Further explanation</h3>

Percent yield is the compare of the amount of product obtained from a reaction with the amount you calculated

(theoretical)

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

<h3 />

Reaction

2ZnS+3O₂ ⇒ 2ZnO+2SO₂

MW ZnS = 97.474 g/mol

  • mol ZnS

\tt \dfrac{150}{97.474}=1.54

MW ZnO = 81.38 g/mol

  • mol ZnO (from mol ZnS as limiting reactant, O₂ excess)

\tt \dfrac{2}{2}\times 1.54=1.54

  • Actual ZnO produced

\tt 1.54\times 81.38=125.33~g

Theoretical production = 125.388

  • %yield

\tt \dfrac{68.5}{125.33}\times 100\%=\boxed{\bold{54.6\%}}

4 0
3 years ago
Determine the chemical formula for the molecule shown.
OLEGan [10]

Answer: Formula is C4H8O. In every branch of line formula there are Carbon atom. Carbon makes 4 bonds so In branch left in which two CH3-groups are attached there are also an Hydrogen aton which is not shown.

Explanation: Molecule is organic, it is classified as aldehyde.

Hydrocarbons contains only Carbon and Hydrogen atoms, Organic molecules can contain also other atoms.

Reactions of aldehydes are reduction to alcoholes or oxidation to carboxylic acids. It can not for a polymer.

5 0
3 years ago
Is this the correct answer?
Alona [7]
I believe so, looks like it
8 0
3 years ago
Is a cytoplasm made of 80 percent of water
Ostrovityanka [42]
Yes cytoplasm is about 80% of water and usually colourless
5 0
3 years ago
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