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3 years ago

What is the difference between an atom and an element?

Chemistry

1 answer:

Travka [436]3 years ago

4 0

Answer:

A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom

Explanation:

so In simple terms an atom contains Protons and Electrons and can be found in an Element, but an element comprises of atoms which come together to form up that particular Element

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Covalent bonds result from the complete transfer of an electron from one atom to another. True or false

Fynjy0 [20]

False, covalent bonds result when atoms share electrons.

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3 years ago

Acetone, the solvent in nail polish remover, has a density of 0.761 g/ml What is the volume of 25.0g of acetone

Jlenok [28]

Answer: 100.0g

Explanation:

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1 year ago

What is the complement DNA strand to GTACCTAGGT?

Serga [27]

CATGGATCCA for future reference this is considered biology, you may get a quicker response if you categorize it as such :)

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2 years ago

Read 2 more answers

Which one of the following compounds will be least soluble in water?

algol [13]

Water is a polar solvent. Since, 'Like dissolves like' a polar compound will be most soluble in water whereas a non-polar compound will be the least soluble.

The increasing order of polarity for the given organic compounds is:-

CH3OCH3 < CH3NH2 < CH3CHO < CH3CH2OH

Ether is the least polar and hence least soluble in water.

8 0

2 years ago

Read 2 more answers

In a certain industrial process involving a heterogeneous catalyst, the volume of the catalyst (in the shape of a sphere) is 10.

olga nikolaevna [1]

Answer:

a. The second run will be faster.

d. The second run has twice the surface area.

Explanation:

The rate of a reaction is proportional to the surface area of a catalyst. Given the volume (V) of a sphere, we can find its surface area (A) using the following expression.

$A=\pi ^{1/3} (6V)^{2/3}$

The area of the 10.0 cm³-sphere is:

$A=\pi ^{1/3} (6.10.0)^{2/3}=22.4cm^{2}$

The area of each 1.25 cm³-sphere is:

$A=\pi ^{1/3} (6. 1.25)^{2/3}=5.61cm^{2}$

The total area of the 8 1.25cm³-spheres is 8 × 5.61 cm² = 44.9 cm²

The ratio of 8 1.25cm³-sphere to 10.0 cm³-sphere is 44.9 cm²/22.4 cm² = 2.00

Since the surface area is doubled, the second run will be faster.

6 0

3 years ago