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Aleonysh [2.5K]
3 years ago
9

Which is evidence that supports the dynamo theory?

Chemistry
1 answer:
makvit [3.9K]3 years ago
4 0

D Earth's core contains mostly iron and nickel

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How can solubility help you identify a substance
lorasvet [3.4K]
The solubility of a substance is usually expressed as the mass of a substance, in g, that will dissolve in a fixed amount of solvent (liquid), usually 100 g, at a given temperature.
5 0
3 years ago
PLZ HELP WILL MARK BRAINLIEST I NEED INSTANT HELP THIS IS A MAJOR GRADE I THINK I KNOW THE ANSWER BUT NOT SURE IF IT'S RIGHT. PL
JulsSmile [24]
Asexual is growth and repair , 4 daughter cells and cell divides once dna replicates and the rest is sexual reproduction besides divides one
3 0
3 years ago
. KMnO4 oxidizes ethyl benzene to benzoic acid. If this reaction generally results in a 40 % experimental yield, how many grams
lyudmila [28]

Answer:

530.835 g

Explanation:

First we convert 244 g of benzoic acid (C₇H₆O₂) to moles, using its molar mass:

  • 244 g benzoic acid ÷ 122.12 g/mol = 2.00 moles benzoic acid

Theoretically,<em> one mol of ethyl benzene would produce one mol of benzoic acid</em>. But the experimental yield tells us that one mol of ethyl benzene will produce only 0.4 moles of benzoic acid.

With the above information in mind we convert 2.00 moles of benzoic acid into moles of ethyl benzene:

  • 2.00 moles benzoic acid * \frac{1molEthylBenzene}{0.4molBenzoicAcid} = 5.00 moles ethyl benzene

Finally we <u>convert moles of ethyl benzene </u>(C₈H₁₀)<u> into grams</u>, using its <em>molar mass</em>:

  • 5.00 moles ethyl benzene * 106.167 g/mol = 530.835 g ethyl benzene
7 0
2 years ago
Write a balanced chemical equation for the fermentation sucrose (C12H22O11) by yeasts in which the aqueous ethyl alcohol (C2H5OH
kodGreya [7K]

Answer:

C12H22O11(aq) + H2O(l) —> 4C2H5OH(aq) + 4CO2(g)

Explanation:

When aqueous sugar (sucrose) react with water in the presence of yeast, the following products are obtained as shown in the equation below:

C12H22O11(aq) + H2O(l) —> C2H5OH(aq) + CO2(g)

Now, we shall balance the equation as follow:

There are a total of 24 atoms of H on the left side and 6 atoms on the right side. It can be balance by putting 4 in front of C2H5OH as shown below:

C12H22O11(aq) + H2O(l) —> 4C2H5OH(aq) + CO2(g)

There are a total of 9 atoms of C on the right side and 12 atoms on the left side. It can be balance by putting 4 in front of CO2 as shown below:

C12H22O11(aq) + H2O(l) —> 4C2H5OH(aq) + 4CO2(g)

Now the equation is balanced.

8 0
3 years ago
calculate the volume of a rectangular prism with a length of 5.6cm, a width of 2.1cm, and a height of 6.6cm
Rus_ich [418]
The volume of a prism is base times height so it should be 5.6 times 2.1 times 6.6 which gives us 77.616cm^3
7 0
3 years ago
Read 2 more answers
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