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Artyom0805 [142]
3 years ago
13

Molecules are its building blocks) is it mixture or compound? Please help!

Chemistry
1 answer:
Zepler [3.9K]3 years ago
6 0

Answer:

compound i guessed

Explanation: Compounds are two or more elements chemically combined in definite proportions by weight. Mixtures are two or more substances not chemically combined.

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The compound FeCl3 is made of
stepladder [879]

Iron and chlorine

For every iron there are 3 chlorine.

7 0
3 years ago
Which has more gravitational potential energy—a book sitting on a desk or the same
nydimaria [60]

Answer:

The book sitting on the desk

Explanation:

The gravitational potential energy of an object is the energy possessed by the object due to its position relative to the ground.

It is calculated as:

GPE=mgh

where

m is the mass of the object

g is the acceleration due to gravity

h is the height of the object with respect to the ground

From the formula, we see that the GPE of an object is directly proportional to the heigth h: so, the higher the location of the object, the larger the GPE.

In this problem, we are comparing a book sitting on a desk and the same book sitting on the floor. In the two situations, the mass of the book is the same; however, in the first case, the value of the height is h, while in the second case, the value of h is lower (because the book is located at a lower height, being on the floor).

Therefore, we can conclude that the first book must have a larger GPE, since it has a larger value of h.

6 0
3 years ago
Is it called when a substance enters a gaseous phase without boiling?
Helen [10]

Answer:

its called sublimation

3 0
3 years ago
Read 2 more answers
Methane is a gas at room temperature and pressure. Explain why this is the case.
Sveta_85 [38]

Answer:

hope it helps ❤

Explanation:

Methane only has london dispersion forces since it is nonpolar. London dispersion force is the weakest intermolecular force, so the forces between its molecules will be weak. This leads to a low boiling point that is lower than room temperature, which makes it a gas at room temperature.

4 0
3 years ago
Read 2 more answers
The heat equation, as given in the introduction, can also be rearranged to calculate the mass or temperature change for a substa
notka56 [123]

Answer:

The correct answer is 281.39 grams.

Explanation:

To arrive at this answer you must first keep in mind the basic equation:

<em>Q = m*Cp* ΔT</em>

Now, in order to calculate the necessary aluminum mass that absorbs 2138 J when passing from 14.83 to 23.31 ° C you must "clear" <em>m</em> of the previous equation.

This means, leave only the mass on one side of the equation, and "pass" <em>Cp</em> and <em>ΔT</em> to the other side dividing <em>Q</em>.  This would look like this:

m= Q/ (Cp*ΔT)

Then, <u>you need the value of specific heat of aluminum</u> in the correct units, that is J / g ° C, the approximate value is 0.896.

ΔT is calculated by doing the mathematical operation:

23.31 °C - 14.83 °C = 8.48 °C

<em> Finally, the values of: Q (data provided in joules), Cp (J / g ° C) and ΔT (calculated in ° C) are replaced in the last equation and the mass (in grams) is calculated resulting in 281.39 grams.</em>

3 0
3 years ago
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