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Illusion [34]
2 years ago
10

Allison is trying to identify the type of bacteria found on common surfaces like doorknobs, table tops, etc. For this experiment

, she will collect samples of bacteria and allow them to grow for several days. Then, she will observe the bacterial colonies that are formed and compare their appearance with pictures of bacterial colonies in her textbook. Which of the following pieces of equipment will Allison most likely use for the growth of the bacteria? A. microscope B. graduated cylinder C. barometer D. Petri dish
Chemistry
2 answers:
strojnjashka [21]2 years ago
8 0
She would use a microscope
Ludmilka [50]2 years ago
3 0
I think she would use A) A MICROSCOPE 
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4 0
3 years ago
Calculate the number of miles of NH4SO4 in 250 ml of a 1.5 M solution
ahrayia [7]
I’m guessing you mean moles. So the big M stands for mol/L. That means first you’d want to convert your mL to L. To do this write your 250mL then make parenthesis for the conversion. 1L=1000mL
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.250L is what you get. Now we need to figure out how to cancel the L with what we have left. We know M stands for Moles/L so this means in order to get ride of L we need to multiply our new number times the 1.5
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1L
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3 0
3 years ago
Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation: 3NO2(g)+H2O(l)→2HNO3(l)+
Vesnalui [34]

Answer:

2 mol NO2

Explanation:

                                      3NO2(g)+H2O(l)→2HNO3(l)+NO(g)

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given                           11 mol          3 mol

for 3 mol NO2  -----   1 mol H2O

for x mol NO2  -----   3 mol H2O

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x = 3 *3/1 = 9 mol NO2

So, for 3 mol H2O are needed only 9 mol NO2.

But we have 11 mol NO2. So, NO2 is in excess, and

11 mol NO2 - 9 mol NO2 = 2 mol NO2 will be left after reaction.

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Explanation:

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Explanation:

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