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mario62 [17]
3 years ago
5

What is allotropy ?​

Chemistry
2 answers:
notsponge [240]3 years ago
5 0
An example of an allotrope is carbon:
Carbon can exist in graphite, diamond and amorphous
stiks02 [169]3 years ago
3 0

Answer:

the existence of two or more different physical forms of a chemical element.

Explanation:

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nordsb [41]

Answer:

Law of Conservation of Energy

Explanation:

6 0
3 years ago
The standard enthalpy of formation (ΔHf°) of calcium carbonate is –1207 kJ/mol. Which ONE of the equations below has ΔH° = –1207
Art [367]

Answer:

A) Ca(s) + C(s) + 3/2 O₂(g) → CaCO₃(s)

Explanation:

Standard enthalpy of formation of a chemical is defined as the change in enthalpy durin the formation of 1 mole of the substance from its constituent elements in their standard states.

The consituent elements of calcium carbonate, CaCO₃, in their standard states (States you will find this pure elements in nature), are:

Ca(s), C(s) and O₂(g)

That means, the equation that represents standard enthalpy of CaCO₃ is:

<h3>A) Ca(s) + C(s) + 3/2 O₂(g) → CaCO₃(s)</h3><h3 />

<em>Is the equation that has ΔH° = -1207kJ/mol</em>

3 0
3 years ago
In the diagram below, west is to the left, east is to the right, and the observer is looking toward the north. What is the direc
Damm [24]
I think the answer is c since the it’s looking at NW, the wind is coming from SE
7 0
2 years ago
Read 2 more answers
What happened to the wind speeds of the storms?
oksano4ka [1.4K]
They would most likely speed up.
6 0
3 years ago
A substance with a pH of 9 ha
TEA [102]

Answer:

Baking soda has a ph of 9

Explanation:

5 0
3 years ago
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