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Lyrx [107]
3 years ago
9

Which equation using element symbols correctly describes the reaction: "One molecule of methane plus two molecules of diatomic o

xygen react to form two molecules of water and one molecule of carbon dioxide?"
Chemistry
2 answers:
MrMuchimi3 years ago
8 0

Answer:

CH4+2O2→2H2O+CO2

8090 [49]3 years ago
5 0
What the other comment said it’s right :)
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A scientist carries out a reaction twice. In Trial A, the scientist combines the reactants in a container. In Trial B, the scien
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It would be C because It will have a lower activation energy than Trial A.
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Which kind of investigations allow for the control of variables?
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the answer to this is O hypothesis

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Describe the observation Robert Brown made.​
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In 1827, Brown observed, using a microscope, that small particles ejected from pollen grains suspended in water executed a kind of continuous and jittery movement, this was named “Brownian motion”. ... This random movement of particles suspended in a fluid is now called after him.

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If you have 40 grams of potassium nitrate in 100 grams of water at 20 C:
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Answer:

Explanation:The final homogenous solution, after cooling it to 40°C, will contain 47 g of potassium sulfate disolved in 150 g of water, so you can calculate the amount disolved per 100 g of water in this way:

[47 g of solute / 150 g of water] * 100 g of g of water = 31.33 grams of solute in 100 g of water.

So, when you compare with the solutiblity, 15 g of solute / 100 g of water, you realize that the solution has more solute dissolved with means that it is supersaturated.

To make a saturated solution, 15 grams of potassium sulfate would dissolve in 100 g of water.

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7 0
3 years ago
Hemoglobin is the protein that transports oxygen in mammals. Different species of mammals have slightly different forms of hemog
Anna35 [415]

Answer;

= 64561.95 g/mole

Explanation;

mass of Fe in 100g = .346g

= .346 / 55.8452 moles

= 0.0061957 moles  

These represent 4 moles of Fe in the molecule so moles of hemaglobin

=  0.0061957/4  

= 0.0015489 moles  

these are in 100 g so mass of 1 mole = 100 / 0.0015489

= 64561.95 g / mole

molar mass of hemoglobin = 64561.95 g/mole

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3 years ago
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