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2 years ago

Choose the correct answer. The difference between the mass number of an isotope and its atomic number is:

Chemistry

1 answer:

adelina 88 [10]2 years ago

6 0

The difference between the mass number of an isotope and its atomic number is number of neutrons.

<h3>What is atomic mass? </h3>

Atomic mass is defined as the sum of number of protons and number of neutrons of an element.

Atomic mass is represented by A.

<h3>What is Atomic number?</h3>

Atomic number is defined as the number of electron in an element.

Atomic number is represented by Z.

<h3>What is Isotopes? </h3>

Isotopes are the element which have same atomic number but have different atomic mass.

Number of proton is equal to number of electrons.

Proton is positively charged, electrons are negativity charge while neutrons are neutral in nature.

Proton and neutrons are present in the nucleus of an element. On the other hand, electron revolves around the nucleus.

For example:

The atomic mass of¹⁶₈O is 16, while of ¹⁷₈O is 17.

Neutrons = atomic mass - atomic number

Neutrons of ¹⁶₈O = 16-8 = 8

Neutrons of ¹⁷₈O = 17-8 = 9

So, they have different atomic mass and number of neutrons.

Thus, we concluded that the difference between the mass number of an isotope and its atomic number is number of neutrons.

learn more about atomic mass:

brainly.com/question/14250653

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Most minerals are _______ at room temperature.<br><br> solid<br> gas<br> liquid

Tomtit [17]

Answer:

solid

Explanation:

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3 years ago

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Students working in lab accidentally spilled 17 l of 3.0 m h2so4 solution. they find a large container of acid neutralizer that

bogdanovich [222]

Answer is: 8568.71 of baking soda.

Balanced chemical reaction: H₂SO₄ + 2NaHCO₃ → Na₂SO₄ + 2CO₂ + 2H₂O.

V(H₂SO₄) = 17 L; volume of the sulfuric acid.

c(H₂SO₄) = 3.0 M, molarity of sulfuric acid.

n(H₂SO₄) = V(H₂SO₄) · c(H₂SO₄).

n(H₂SO₄) = 17 L · 3 mol/L.

n(H₂SO₄) = 51 mol; amount of sulfuric acid.

From balanced chemical reaction: n(H₂SO₄) : n(NaHCO₃) = 1 :2.

n(NaHCO₃) = 2 · 51 mol.

n(NaHCO₃) = 102 mol, amount of baking soda.

m(NaHCO₃) = n(NaHCO₃) · M(NaHCO₃).

m(NaHCO₃) = 102 mol · 84.007 g/mol.

m(NaHCO₃) = 8568.714 g; mass of baking soda.

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3 years ago

Considering the limiting reactant, what is the mass of zinc sulfide produced from 0.250 g of zinc and 0.750 g of sulfur? Zn(s)+S

DIA [1.3K]

Answer:

The mass of zinc sulfide produced is $M_{ZnS} = 0.76 \ g$

Explanation:

From the question we are told that

The mass of zinc is $m_z = 0.750 \ g$

The mass of sulfur is $m_s = 0.250 \ g$

The molar mass of $Zn_{(s)}$ is a constant with value 65.39 g /mol

The molar mass of $S_{(s)}$ is a constant with value 32.01 g/mol

The molar mass of $ZnS_{(s)}$ is a constant with value 97.46 g/mol

The reaction is

$Zn_{(s)} + S_{(s)} ------> ZnS_{(s)}$

So from the reaction

1 mole of $Zn_{(s)}$ react with 1 mole of $S_{(s)}$ to produce 1 mole of $ZnS_{(s)}$

This implies that

65.39 g /mol of $Zn_{(s)}$ react with 32.01 g/mol of $S_{(s)}$ to produce 97.46 g/mol of $ZnS_{(s)}$

From the values given we can deduce that the limiting reactant is sulfur cause of the smaller mass

0.250 g of $Zn_{(s)}$ react with 0.250 of $S_{(s)}$ to produce $x \ g$ of $ZnS_{(s)}$

$x = \frac{97.46 * 0.250}{32.01}$

$x = 0.76 \ g$

Thus the mass of the mass of zinc sulfide produced is

$M_{ZnS} = 0.76 \ g$

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4 years ago

Classify the following substituents according to whether they are electron donors or electron acceptors relative to hydrogen by

igor_vitrenko [27]

Species that have a lone pair of electrons often donate electrons by resonance while substituents that are electron deficient take away electrons by resonance.

<h3>What is resonance?</h3>

The term resonace has to do with the movement of electron pairs in a molecule. Inductive effects has to do with the drawing of electron density towards an atom or bond.

The two effects depends on the nature of a substituent. For instance, species that have a lone pair of electrons often donate electrons by resonance while substituents that are electron deficient take away electrons by resonance.

The question is incomplete hence the exact nature of the substituents can not be determined.

Learn more about resonance: brainly.com/question/23287285?

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3 years ago

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So, what's your question..?. You just gave options..

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3 years ago

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