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3 years ago

12

Several constructive processes helped build mountains on Earth. All BUT one of these is a way mountains can be built. That is A)

deposition. B) faulting. C) landslides. D) volcanoes.

1 answer:

Naddik [55]3 years ago

7 0

It is landslides i got it right on the test

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What is the mass in grams of<br>1.0mole of (NH4)2S?

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2 years ago

1. How is the chemical symbol of an element determined?

mr_godi [17]

The number of protons defines what element it is and also determines the chemical behavior of the element.

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2 years ago

Part A Transmutation is the process of transforming one element into another through nuclear reactions. What will be the nuclide

S_A_V [24]

<u>Answer:</u> The isotope produced after the transmutation process of Cf-249 and C-12 is $_{104}^{257}\textrm{Rf}$

<u>Explanation:</u>

Transmutation is defined as the process where one chemical isotope gets converted to another chemical isotope. The number of protons or neutrons in the isotope gets changed.

The chemical equation for the reaction of Californium-249 nucleus with Carbon-12 nucleus follows:

$_{98}^{249}\textrm{Cf}+_6^{12}\textrm{C}\rightarrow _{Z}^{A}\textrm{X}+4_0^1\textrm{n}$

In a nuclear reaction, the total mass and total atomic number remains the same.

<u>To calculate A:</u>

Total mass on reactant side = total mass on product side

249 + 12 = A + 4

A = 257

<u>To calculate Z:</u>

Total atomic number on reactant side = total atomic number on product side

98 + 6 = Z + 0

Z = 104

Hence, the isotope produced after the transmutation process of Cf-249 and C-12 is $_{104}^{257}\textrm{Rf}$

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2 years ago

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2 years ago

What is the molar mass of (NH4)2S

Anastaziya [24]

Answer:

This compound is Ammonium Sulphide and has molar mass 68 g/mol.

Explanation:

Molar Mass : It is the mass of 1 mole of the substance and in grams.Its units are gram/mole.

It is numerically equal to mass of the substance in atomic mass units

How to calculate Molar mass :

$(NH_{4})_{2}S = 2(atomic\ mass\ of\ N + 4\times mass\ of\ H ) +atomic\ mass\ of\ S$

$(NH_{4})_{2}S = 2(14 + 4(1) ) + 32$

$(NH_{4})_{2}S = 2(14 + 4 ) + 32$

$(NH_{4})_{2}S = 2(18) + 32$

$(NH_{4})_{2}S = 36 + 32$

$(NH_{4})_{2}S = 68$ grams/mole

Molar mass of Ammonium sulphide is 68 g/mol

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2 years ago