CHEMISTRY HIGH SCHOOL

How many hydrogen atoms are in the following molecule of ammonium sulfide? (NH4)2Sa. 2
b. 4
c. 8
d. 16

Answers

Answer 1
Answer:

There are eight hydrogen atoms in the following molecule of ammonium sulfide. Thus, the correct option for this question is C.

What is a Molecule?

A molecule may be defined as a cluster of atoms that are significantly bonded together in order to represent the smallest basic unit of a chemical compound that can involve in a chemical reaction.

According to this question, the correct representation of ammonium sulfide is (NH_4)_2S, where the number of the hydrogen atoms is equal to 4 × 2 = 8. Apart from this, the number of nitrogen atoms is 2. While the number of sulfur atoms is only 1.

Therefore, there are eight hydrogen atoms in the following molecule of ammonium sulfide. Thus, the correct option for this question is C.

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Answer 2
Answer: The are eight hydrogen atoms in ammonium sulfide because there are 2 molecules of ammonium.

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The curved top surface of a liquid column

Answers

The curved top of a liquid is the meniscus

Answer:

its a meniscus

hope this works. please mark me brainliest..

When a nucleus of ^235 U undergoes fission, it breaks into two smaller, more tightly bound fragments.1) Calculate the binding energy per nucleon for ^235U? (Express with appropriate units)2) Calculate the binding energy per nucleon for the fission product ^137 Cs? (Express in appropriate units)

Answers

1) The binding energy per nucleon is 7.59 MeV/nucleon and 2) The binding energy per nucleon is  8.39 MeV/nucleon.

1) The binding energy per nucleon is as follows:

m_proton + m_neutron + m_electron - m_U

= 92*1.007276466812 + 92*5.4857990943e-4 + 143*1.008664916 - (235.0439299)

= 1.9151 u

= 931.494061 * 1.9151 MeV

= 1784 MeV

= 1784/235 = 7.59 MeV/nucleon

2) The binding energy per nucleon is as follows:

m_proton + m_neutron + m_electron - m_Cs

= 55*1.007276466812 + 55*5.4857990943e-4 + 82*1.008664916 - (136.9070895)

= 1.2338 u

= 931.494061 * 1.2338 MeV

= 1149 MeV

=1145/137 = 8.39 MeV/nucleon

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In ____________, electrons are gained by atoms and lost by others

Answers

the answer is ionic bonds
in ions atoms lose and gain electrons

How does an earthquake cause a tsunami?

Answers

yes because the earth plates are grinding against each other and are the main cause of Tsunami!
When an earthquake happens under water a tsunami is formed

What is the name of H2S? A. sulfuric acid B. sulfurous acid C. hydrosulfurous acid D. hydrosulfuric acid

Answers

correct answer is D. Hydrosulfuric acid

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Correct answer is D! Good luck!

Elements occur in a number of isotopic forms. In this problem, you will learn about the notation used to distinguish different isotopes.How many protons Z and how many neutrons N are there in a nucleus of the most common isotope of silicon, 28/14Si?

Answers

Answer:

  • There are 14 protons (Z) and 14 neutrons (N) in a nucleus of the most common isotope of silicton.

Explanation:

The notation of the most common isotope of silicon is:

  • ^(28)_(14)Si

The superscript, 28, to the left of the chemical symbol, Si, is the mass number, usually identified with the symbol A, and it is the sum of the protons and neutrons.

The subscript, 14, to the left of the chemical symbolr, Si, is the atomic number, Z, which is the number of protons.

Then, you have this equation:

  • mass number = number of protons + neutrons, or, in symbols:

  • A = Z + N

The number of protons is the same for any isotope of the same element. This is, all the isotopic forms of silicon have the same number of prtons: 14

The number of neutrons is determined from the equation A = Z + N, solving for N:

  • N = A - Z = 28 - 14 = 14.

Hence, the most common isotope of silicon has 14 protons and 14 neutrons.
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