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ira [324]
3 years ago
8

Bacteria are invisible to humans except under a microscope. what evidence did Pasteur use to show that bacteria was the cause of

soured wine?
A. heated wine didn't sour
B. capped wine didn't sour
C. filtered wine didn't sour
D. chilled wine Didn't sour
Chemistry
1 answer:
gogolik [260]3 years ago
3 0

Pasteur said that heating the wine at about 120°F would make sure that the wine would not turn sour, so the option is A.

Here's the information link: http://www.faqs.org/health/bios/83/Louis-Pasteur.html

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Given the balanced equation 2C4H10 + 13O2 → 8CO2 + 10H2O, how many moles of CO2 are produced when 14.9g of O2 are used?
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Answer: The number of moles of CO_2 produced are, 0.287 moles.

Explanation : Given,

Mass of O_2 = 14.9 g

Molar mass of O_2 = 32 g/mol

First we have to calculate the moles of O_2

\text{Moles of }O_2=\frac{\text{Given mass }O_2}{\text{Molar mass }O_2}

\text{Moles of }O_2=\frac{14.9g}{32g/mol}=0.466mol

Now we have to calculate the moles of CO_2

The balanced chemical equation is:

2C_4H_{10}+13O_2\rightarrow 10H_2O+8CO_2

From the reaction, we conclude that

As, 13 mole of O_2 react to give 8 moles of CO_2

So, 0.466 mole of O_2 react to give \frac{8}{13}\times 0.466=0.287 mole of CO_2

Therefore, the number of moles of CO_2 produced are, 0.287 moles.

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3 years ago
Which of the following species has the greatest
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<span>Mn's atomic number is 25 so you have 25 protons and 25 electrons in a neutral atom. Since no charge is shown, the number of electrons is 25
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