aamu15

28.01.2020 • 

Chemistry

This information is taken directly from exercise 3 in the chem 111/112 laboratory manual. another example of excellence in the presentation of data comes from a study on the cholera outbreak in london in 1854 drawn by john snow. by overlaying the residences of the casualties on a city map that showed sources of water, the pump on broad street appears to be clearly implicated in the transmission of the disease." while writing a report, a student uses this source for background information about data presentation le of excellence in data presentation comes from a study of the cholera outbreak in london in 1854. john snow created a city map that showed the residences of the casualties and sources of water. according to this map, the pump on broad street appears to be clearly implicated in the transmission of the disease." he uses this citation for the report: "3. leung. t. w. schaefer. a. ed exercise 3: the graphical depiction of scientitic data. general chemistry of the texas environment, 7th edition. 2018. 10. was this cited correctly?

a. no
b. yes

Ответ:

Giabear23

17.07.2021

Chemistry

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Al

Explanation:

4 Al  +  3 O₂  →  2 Al₂O₃

You need to figure out which one has the smaller mole ratio.  Convert both substances from grams to moles.

(10.0 g Al)/(26.98 g/mol) = 0.3706 mol Al

(19.0 g O₂)/(32.00 g/mol) = 0.5938 mol O₂

Now, use the mole ratios of reactant to product to see which substance produces the least amount of product.

(0.3706 mol Al) × (2 mol Al₂O₃/4 mol Al) = 0.1853 mol Al₂O₃

(0.5938 mol O₂) × (2 mol Al₂O₃/3 mol O₂) = 0.3958 mol Al₂O₃

Since aluminum produces the least amount of product, this is the limiting reagent.

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