3 years ago

What is the purpose of the underlined sentence in the passage?

Chemistry

1 answer:

gregori [183]3 years ago

5 0

Answer:

Explanation:

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What would be the definition of chemical indicators?

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A solution containing cacl2 is mixed with a solution of li2c2o4 to form a solution that is 2. 1*10^-5m in calcium ion and 4. 75*

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Which statement best explains how the models differ? Model A shows the formation of ions, and model B does not show the formatio

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A collection of pennies was investigated. 10.00% were found to have been minted in San Francisco with an average mass of 2.15 g

german

The average mass of the pennies in the sample is 2.16 g.

We have a set of pennies from which 10.00% have an average mass of 2.15 g and 90.00% have an average mass of 2.156 g. The average mass (am) of the whole set is a weighted average, that considers the mass (m) and the percentage (perc) of each group. We can calculate it using the following expression.

$am=\frac{\Sigma m \times perc }{100 \%} = \frac{2.15g \times 10.00\% + 2.156 g \times 90.00\% }{100\%} = 2.1554 g \approx 2.16 g$

The average mass of the pennies in the sample is 2.16 g.

You can learn more about weighted average here: brainly.com/question/18554478

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3 years ago