3 years ago

Which of the following chemical formulas shows a covalent bond (a) CO2 (b) MgO (c) NaCL (d) HBr

Chemistry

1 answer:

AlexFokin [52]3 years ago

3 0

The correct answer is A. CO2
hope this helps

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The exhaust gas from an automobile contains 3% by volume of carbon monoxide (CO). Express this concentration in mg/m3 at 25oC an

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$24540\frac{mg}{m^3}$

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Hello,

In this case, since the 3% by volume is represented as:

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$=\frac{3L\ CO}{100L\ gas}*\frac{0.818g\ CO}{1L\ CO} *\frac{1000mg\ CO}{1g\ CO} *\frac{1000L\ gas}{1m^3\ gas} \\\\=24540\frac{mg}{m^3}$

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