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Rina8888 [55]
3 years ago
13

In much of the world SI units are used in everyday life and not just in science. Why would it make sense for people in the Unite

d States to use SI units everyday life too? Explain using math terms such as calculate and convert.
Chemistry
1 answer:
KiRa [710]3 years ago
6 0

Answer:

Find the explanation below.

Explanation:

It would make sense for the United States to use SI units in everyday life because most calculations they do, in daily activities such as business and science, affect people in other parts of the world. For example, a United States writer who writes about weight in pounds(lb) and ounce(oz) might not be easily understood by a reader in many other countries of the world. This is because the reader might not be able to convert the measurement using the standards of the SI units where weight is measured in kilograms(kg).

The international system of units is the upgraded system of measurement from the metric system and it is used by almost all the countries of the world except three countries of which the United States is included.

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In a laboratory demonstration, a balloon filled with methane and oxygen was exposed to a flame. The result was a brief, large fl
Savatey [412]

Answer:

<u>The equation is not correct: </u>

[CH4 + O2 → CO2 + 2H2O]

Explanation:

The chemical formulas for methane, oxygen, and carbon dioxide are correct, but the equation is not balanced, so we really don't know idf the overall reaction is written correctly.

Let's balance the reaction:

CH4 + O2 → CO2

We need to have the same numbers of atoms on both sides.  

Count the numbers of each atom:

<u>Element</u>    <u>Reactants</u>    <u>Products</u>    <u>Difference</u>

 C                         1              1                  0                  Balanced

 H                         4              0                -4                  XXX!!!!

 O                         2              2                 0                  Balanced

The hydrogens aren't showing up in the products.  In fact, there is a product missing entirely from the reaction, H2O, water.  The basic reaction is:

CH4 + O2 → CO2 + H2O

Now balance this reaction:

<u>Element</u>    <u>Reactants</u>    <u>Products</u>    <u>Difference</u>

 C                         1              1                  0                  Balanced

 H                         4              2                -2                  Hmmmm . . .

 O                         2              3                 1                  Uh = oh . . .

This reaction is not possible - there are either too many or too few element atoms (the "Difference").

We can adjust the coefficients for each of the molecules to balanced the equation.  This is a bit tricky, but it consists of trying some coefficients that would make things balance.  Only whole number coefficients are allowed in the final answer, although fractions might be used in the process to help find the whole numbers.

We need 2 H2O molecules to account for the 4 hydrogens on a single methane molecule

Step 1:  CH4 + O2 → CO2 + 2H2O

That leads to:

<u>Element</u>    <u>Reactants</u>    <u>Products</u>    <u>Difference</u>

 C                         1               1                 0                  Balanced

 H                         4              4                0                   Balanced

 O                         2              4                 2                  Darn

We need more oxygen atoms, so:

Step 2:  CH4 + 2O2 → CO2 + 2H2O

This leads to:

<u>Element</u>    <u>Reactants</u>    <u>Products</u>    <u>Difference</u>

 C                         1               1                  0                  Balanced

 H                         4              4                 0                   Balanced

 O                         4              4                 0                   Balanced

This is a balanced reaction, and the correct chemical equation.

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Answer:

www.doe.virginia.gov/testing/sol/standards_docs/...

Explanation:

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Answer:

Explanation:

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