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lapo4ka [179]
2 years ago
11

Plete the following problems significant figures: 6 × 0.30​

Chemistry
1 answer:
jeka57 [31]2 years ago
3 0
6= Only the digits 1 and 6 are the actual measured values. Therefore we have only 2 significant figures.

0.3= Zeros used as placeholders are not significant. Zeros that come before non-zero integers are never significant. Example 5: The zeros in 098, 0.3, and 0.000000000389 are not significant because they are all in front of non-zero integers. c. If the zeros come after non-zero integers and are followed by a decimal point, the zeros are significant.
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Answer:

Here's the conversion factor you need:

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So, for your question we want to go 405,696 km....

405696 km   x   39370 inches/ 1 km  =   15972283464 inches

                       

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\large \boxed{\text{528.7 g} }

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It often helps to write the heat as if it were a reactant or a product in the thermochemical equation.

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We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

M_r:                      32.00

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\text{Mass of C$_{8}$H}_{18} = \text{16.52 mol O}_{2} \times \dfrac{\text{32.00 g O}_{2}}{\text{1 mol O}_{2}} = \textbf{528.6 g O}_{2}\\\text{The reaction requires $\large \boxed{\textbf{528.67 g O}_{2}}$}

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