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MaRussiya [10]
3 years ago
9

answer the following question by entering the numeric value with appropriate units. if the length of one side of a square is 12.

0 m, what is the perimeter of the square?
Chemistry
1 answer:
Tasya [4]3 years ago
8 0
Using the length given '12 m', because the shape of the object is a square all sides are congruent. 
Basically 12+12+12+12=48 or 12 x 4= 48
The answer is 48 m
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Carbon is a component of so many elements because <span>It can form stable compounds with other elements and also bond with them.</span>
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PLEASE I NEED HELP ASAP!!!!
miv72 [106K]

The percent yield of the calcium hydroxide is 84.5%.

<h3>What is stoichiometry?</h3>

Stoichiometry enables us to obtain the mass of a substance form the equation of the reaction.

The equation of the reaction is;

CaCO3 + 2HCl -----> CaCl2 + CO2 + H2O

Number of moles of X = 40.0 grams/100 g/mol = 0.4 moles

Number of moles of HCl = 850/1000 * 1 M = 0.85 moles

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= 0.8 moles of HCl

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The reaction is 1:1 then the amount of CO2  produced is 0.4 moles

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2) The reaction equation is; 2NaOH + CaCO3 --->  Ca(OH)2 + Na2CO3

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Number of moles of NaOH= 40/1000 L * 2 M = 0.08 moles

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= 0.5 moles

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2 moles of NaOH produces 1 mole of CO2

0.08 moles of NaOH produces 0.08 moles * 1 mole/2 moles

= 0.04 moles of CO2

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Learn ore about percent yield:brainly.com/question/17042787

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5 0
2 years ago
1. How many moles of oxygen gas are needed to form 21.8 liters of water vapor?
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