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3 years ago

How can you tell the difference between an element and a compound

Chemistry

2 answers:

castortr0y [4]3 years ago

7 0

Explanation:

An Element is one and a compound is more than 2elements

stira [4]3 years ago

3 0

Answer:

The difference between an element and a compound is that an element is a substance made of same type of atoms, whereas a compound is made of different elements in definite proportions. Examples of elements include iron, copper, hydrogen and oxygen. Examples of compounds include water (H2O) and salt (Sodium Chloride - NaCl)

Explanation:

Further Differences:

Defintion:

Compound - A compound contains atoms of different elements chemically combined together in a fixed ratio.

Element - An element is a pure chemical substance made of same type of atom.

Representation:

Compound - A compound is represented using its chemical formula that represents the symbols of its constituent elements and the number of atoms of each element in one molecule of the compound.

Element - An element is represented using symbols.

Composition:

Compound - Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule. Elements that compose the compound are chemically combined.

Element - Elements contain only one type of atom. Each atom has the same atomic number i.e., the same number of protons in their nucleus.

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How many protons and neutrons are in 119_Sn? O a. 50 n and 119 p O b. 50 p and 169 1 O c. 50 p and 69 O d. 50 n and 169 p O e. N

Anastaziya [24]

Answer: The given isotope of tin has 50 protons and 69 neutrons.

Explanation:

Atomic number is defined as the number of protons or number of electrons that are present in neutral atom. It is represented as Z.

Atomic number = Number of protons = Number of electrons

Mass number is defined as the sum of number of protons and number of neutrons. It is represented as A.

Mass number = Number of protons + Number of neutrons

We are given:

An isotope having representation $_{50}^{119}\textrm{Sn}$

Mass number of Sn = 19

Atomic number = 50

Number of neutrons = Mass number - Atomic number = 119 - 50 = 69

Hence, the given isotope of tin has 50 protons and 69 neutrons.

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3 years ago

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3 years ago

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Lesechka [4]

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3 years ago

How many grams of NH3 can be produced from 4.89 mol of N2 and excess H2.

Svetllana [295]

Answer:

166.56g of NH3 are produced

Explanation:

The reaction of N2 with H2 to produce NH3 is:

N2 + 3H2 → 2NH3

Where 1 mole of N2 produce 2 moles of NH3

4.89 moles of N2 with excess of H2 produce:

4.89 moles N2 * (2 moles NH3 / 1 mole N2) = 9.78 moles NH3

As molar mass of NH3 is 17.031g/mol, mass of NH3 produced is:

9.78 moles * (17.031g / mol) =

<h3>166.56g of NH3 are produced</h3>

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2 years ago

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