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yawa3891 [41]
3 years ago
7

Which one of the following is an element?

Chemistry
2 answers:
Cloud [144]3 years ago
7 0
Oxygen is an element.
Flauer [41]3 years ago
3 0
Oxygen is the element
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Materials move across a cell membrane in a process called _______.
maxonik [38]

Answer:

Diffusion

Explanation:

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There are diffrent types of cells for every job in your body. How do we refer to those cells that develop differently?
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Those cells that develop differently are referred  to Specialised Cells.

<u> </u><u>Explanation:</u>

Specialised cells are the one that is assigned to perform a specific role. Every specialised cell in the body is assigned to do their own job. The special features in them help them to perform their functions effectively.

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4 years ago
Calculate the energy required to heat 406.0mg of cyclohexane from 33.5°C to 38.9°C . Assume the specific heat capacity of cycloh
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Answer:

Q = 4.056 J

Explanation:

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∴ m = 406.0 mg = 0.406 g

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∴ T1 = 33.5°C ≅ 306.5 K

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3 years ago
A sample of a compound is determined to have 1.17 g of carbon and 0.287 g of hydrogen. what is the correct representation of the
yarga [219]

CH3 is the empirical formula for the compound.

A sample of a compound is determined to have 1.17g of Carbon and 0.287 g of hydrogen.

The number of atom or moles in the compound is

1.17 g C X  1 mol of C / 12.011 g C = 0.097411 mol of C.

0.287 g H x 1 mol of  H / 1 g H = 0.28474 mol H.

This compound contains 0.097411 mol of carbon and 0.28474 mol of Hydrogen.

So we can represent the compound with the formula C0.974H0.284.

Subscripts in formulas can be made into whole numbers by multiplying the smaller subscript by the larger subscript.

we can divide 0.284 by 0.0974.

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Hence the empirical formula for the sample compound is CH3.

For a detailed study of the empirical formula refer given link brainly.com/question/13058832.

#SPJ1.

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2 years ago
How does a parallel circuit differ from a series circuit?
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