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# Tutor profile: Ramy R.

Inactive
Ramy R.
BS in Neuroscience and Psychology
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## Questions

### Subject:Trigonometry

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Question:

Prove that: $$\frac{d}{dx}$$csc (x) = -$$\frac{COS (X)}{sin^{2}(X)}$$

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Ramy R.

$$\frac{d}{dx}$$csc (x) =-csc(x) cot(x)=-$$\frac{COS (X)}{sin^{2}(X)}$$

### Subject:Chemistry

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Question:

What is the difference between isotopes, Isomers, and Allotropes?

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Ramy R.

Isotopes have the same atomic number, but different atomic mass, on the other hand, Isomers have the same molecular formula but different chemical structure. Allotropes, a chemical element that exist in two forms, same physical state, but different structural modifications of that element.

### Subject:Basic Chemistry

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Question:

How does Law of conservation of matter is different from the law of constant composition?

Inactive
Ramy R.

In the law of conservation of matter, there is no detectable change in mass during chemical reaction, while in the law of constant composition, the chemical compound always contains the same element in the same proportions by mass.

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