Chemistry, 19.09.2019 21:30 Daddysgirl2019

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. when 27.6 g of carbon were burned in the presence of 86.5 g of oxygen, 12.9 g of oxygen remained unreacted. what mass of carbon dioxide was produced? express your answer to one decimal place and include the appropriate units.

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Answer from: journeyhile5

The answer to your question is: 101.2 g of CO2

Explanation:

C = 27.6 g

O₂ = 86.5 g remained 12.9 g

O₂ that reacted = 86.5 - 12.9 = 73.6 g

C + O₂ ⇒ CO₂ The equation is balanced

27.6 73.6 ?

MW 12 32 44

Rule of three

12 g of C 44 g CO2

27.6 g C x

x = 27.6(44)/12 = 101.2 g of CO2

32 g of O2 44 g of CO2

73.6 g of O2 x

x = 73.6(44)/32 = 101.2 g of CO2

Answer from: Quest

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.

Answer from: Quest

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. $hbr$ completely dissociates to $h^+$ and $br-$ ions. a is incorrect because $h_2s$ does not fully ionize to $h^+$ and $hs^-$ ions and some remain as the compound $h_2s$ . c and d are incorrect because, $li_2o$ and $libr$ do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise, if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both $li_2o$ and $libr$ have a complete octet so can not accept any electrons which disqualifies them as acids.

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When carbon is burned in air, it reacts with oxygen to form carbon dioxide. when 27.6 g of carbon we...

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