You exhale about .0800 liters of co2 (carbon dioxide) gas in a single breath. 22.4 liters of co2 contain 6.022 x 1023 molecules. 6,022 x 1023 co2 molecules have a mass of 44.0 grams. find the a) number of carbon dioxide molecules you exhale in each breath. find the mass of the co2 you exhale in a single breath.

Taking into account the rule of three:

In first place, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

That is, what is intended with it is to find the fourth term of a proportion knowing the other three.  

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.

To solve a direct rule of three, the following formula must be followed, being a, b and c known data and x the variable to be calculated:

a ⇒ b

c ⇒ x

So:

To find the number of carbon dioxide molecules, you know that 22.4 liters of CO₂ contain 6.022×10²³ molecules.

If you exhale about 0.0800 liters of CO₂ (carbon dioxide) gas in a single breath, you can aply the following rule of three: if 22.4 liters of CO₂ contain 6.022×10²³ molecules, 0.0800 liters contain how many molecules?

amount of molecules= 2.15×10²¹

Finally, the number of carbon dioxide molecules you exhale in each breath is 2.15×10²¹.

To find the mass of the CO₂, you know that 6.022×10²³ molecules have a mass of 44.0 grams.

If you exhale about 2.15×10²¹ molecules of CO₂ (carbon dioxide) gas in a single breath, you can aply the following rule of three: if 6.022×10²³ molecules have a mass of 44.0 grams, 2.15×10²¹ molecules contain how much mass?

mass= 0.157 grams

Finally, the mass of the CO₂ you exhale in a single breath is 0.157 grams.

Learn more with this examples:

link

link

link

A)

B) 1.57 grams

Explanation:

Given -

Amount of gas exhaled in one single breathe liters

liter of carbon dioxide contains molecules

One liter of carbon dioxide contains

A) Number of molecules in liter of carbon dioxide

B) Mass of molecules is equal to grams

Mass of one molecule

Mass of molecule is" alt="7.306*10^{-23} * 2.150 * 10^{22}\\= 1.57\\" />" />  gram

why many students visually perceive stem as a vapid class?

for many students, however, stem subjects are optically discerned as vapid, tedious, and destitute of authentic-world applications. science and math have always been a major part of the high school curriculum, but many students have disengaged from these subjects because they don’t optically discern that they have any pertinence to the authentic world or students’ daily lives. for them, math and science have become a set of rules, procedures, laws, theorems, and formulas to memorize. some students even develop math apprehensiveness and cerebrate they are incapable of learning higher-level mathematics.

why is stem paramount?

as the u.s. economy changes, the ordinant dictation for stem-capable workers is growing. in may of 2014, the u.s. bureau of labor statistics counted more than 8.3 million stem jobs, which accounted for 6.2 percent of total employment in the cumulated states. that number is expected to perpetuate to increment as u.s. companies grow and innovate to compete in the ecumenical economy. according to the u.s. department of labor, the average salary for all stem jobs is $85,570, which is virtually double the average salary for all jobs.

many people still envision stem professionals as wearing a white lab coat and conducting research in a laboratory. in authenticity, some of the most in-demand stem fields are petroleum engineering, process engineering, and computer engineering. these fields that are experiencing shortages of qualified candidates are additionally among the highest paying, with the average petroleum engineer earning an annual salary of $147,520 in may 2014 according to the u.s. bureau of labor statistics.

in additament, stem subjects edify students valuable skills that are vital for prosperity in all vocations, even those that do not directly require stem erudition. engagement in stem subjects avails students develop quandary-solving, critical mentally conceiving, and leadership skills. these skills are so ecumenical, in fact, that statistics relinquished in the summer of 2013 by the u.s. census bureau designated that about three-quarters of the people with a bachelor’s degree in stem fields are not working in those vocations. many non-stem employers are poaching stem-qualified job candidates because they are more ingenious and collaborative than their non-stem counterparts.

as the ecumenical economy perpetuates to evolve, the desideratum for stem-capable workers will perpetuate to grow. by getting edifiers and students involved in the stem kineticism, an incipient generation of adroit workers will be poised to energize and expand this exhilarating field.

check this over.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.