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Reika [66]
3 years ago
5

Select the correct answer

Chemistry
1 answer:
amm18123 years ago
8 0

Answer:

  C  The experiment shows that the red substance experienced a chemical change.

Explanation:

Apparently, adding heat caused the red substance to decompose into a gas and a metallic liquid. If it were simply a phase change, the original red substance could be expected to return when the temperature cooled. Because the substance apparently decomposed, it is clearly not an element. At no point in the experiment is there any evidence of a plasma being formed.

The observed decomposition is a chemical change.

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Both hydrogen sulfide (H2S) and ammonia (NH3) have strong, unpleasant odors. Which gas has the higher effusion rate? If you open
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4 years ago
5. An object is a regular, rectangular, solid with dimensions of 2 cm by 3cm by 2cm. It has a mass of 24 g. find its density.
m_a_m_a [10]

Answer:

Density, D = 2g/cm^3

Explanation:

Given the following data;

Length = 2cm

Width = 3cm

Height = 2cm

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Therefore, V = L× W × H

Substituting the values, we have;

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Density can be defined as the ratio of mass to volume i.e mass all over volume.

Mathematically, Density = \frac{Mass}{Volume}

D = \frac{M}{V}

Substituting the values, we have;

D = \frac{24}{12}

<em>Density, D = 2g/cm^3</em>

Hence, the density of the rectangular solid is 2g/cm^3.

3 0
3 years ago
What is the formula for carbon?
olasank [31]

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Chemical formula = C

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Explanation:

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Read 2 more answers
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