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3 years ago

Choose the letter that best describes the behavior of a substance during a phase change:

Chemistry

1 answer:

velikii [3]3 years ago

3 0

Answer:

/D/ either absorbs or releases energy

Explanation:

During a phase change energy is either absorbed or released.

A phase change is a reversible process which occurs when a substance changes is its state from one form to another.

Phase changes are used to delineate physical changes.

A phase diagram provides a graphic representation of the change.
The diagram can be 2 dimensional or 3 dimensional.

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sertanlavr [38]

hydrogen combines with sulfur is H2S

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3 years ago

1. Marisa determined the melting point of a substance to be 24.5C. Find the percent error of her measurement if the actual melti

USPshnik [31]

Answer:

$\%\ Error = 21.5\%$

Explanation:

Given

$Measured = 24.5$

$Actual = 31.2$

Required

Determine the percentage error

First, we need to determine the difference in the measurement

$Difference = |Actual - Measured|$

$Difference = |31.2 - 24.5|$

$Difference = |6.7|$

$Difference = 6.7$

The percentage error is calculated as thus:

$\%\ Error = \frac{Difference * 100\%}{Actual}$

$\%\ Error = \frac{6.7 * 100\%}{31.2}$

$\%\ Error = \frac{670\%}{31.2}$

$\%\ Error = 21.4743589744\%$

$\%\ Error = 21.5\%$ approximated

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3 years ago

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2 years ago

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A solution labeled "0.105 M NaOH" would contain ______________ moles of NaOH in each liter of solution.

koban [17]

It would contain 0.105M moles of NaOH in each liter of solution

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3 years ago

muriatic acid is the commercial name for hydrochloric acid that can be purchased from hardware stores as a solution that is 30%(

SSSSS [86.1K]

We have 30% (w/w) HCl this means :
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?? g solution contains 7.5 g HCl
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3 years ago