CHEMISTRY HIGH SCHOOL

Determine the new pressure of o2(g) in the cylinder in atmospheres

Answers

Answer 1
Answer: It is an ideal gas therefore we can use the ideal gas equation to solve the problem. The ideal gas equation is expressed as PV = nRT where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant and T is the temperature. V, n, and T  should be known to solve this problem.

Related Questions

Which of the following particles has the greatest mass? A)An alpha particle B) A Beta Particle C) A Proton D) An Electron
How many moles of sodium hydroxide, NaOH, are in a 35.65 g sampleof NaOH? (The molar mass of NaOH is 40.01 g/mol.)
2 H2 + O2 → 2 H20, how many moles of O2 are needed to yield 7.8 moles ofwater?
Determine the pH of a 5x10^-4 M solution of Ca(OH)2
A base has Kb of 2.5 x 10-11. which of the following statements is true?(1 point)a) this is a concentrated base b)this base ionizes slightly in a aqueous solution c)this is a strong base d)an aqueous solution of this base would be acidic I'm thinking b. help and i'll give medal. Thank you

What is true about the dilution of a solution?The amount of solute decreases.
The volume remains the same.
The amount of solvent increases.
The concentration increases.

Answers

The amount of solvent increases, since the solvent is the one diluting the solution, the more you want your solution diluted, the more of solvent you'd use. :)

As a Ca atom undergoes oxidation to Ca2+, the number of neutrons in its nucleus(1) decreases
(2) increases
(3) remains the same

Answers

Answer:

Hence the correct answer is remains the same

Explanation:

As a Ca atom undergoes oxidation to Ca2+,as follows:

Ca --- Ca 2+ + 2e-

In the process of oxidation calcium loss 2 electron only there is no change in the number of protons as well neutrons therefore there is no change in the number of neutrons in its nucleus

Hence the correct answer is remains the same

Oxidation:

Oxidation is a process in which either 1 or all following changes occurs:

1. Gaining of oxygen atoms

2. Loss of electrons

3. Loss of hydrogen atom.

4. Increasing oxidation number.

Reduction:

Reduction is a process in which either 1 or all following changes occurs:

1. Loss of oxygen atoms

2. Gaining of electrons

3. Gaining of hydrogen atom.

4. Decreasing oxidation number.
Oxidation refers to a change in electrons (In this case, loss of electrons). It has no impact on the number of neutrons, or for that matter on any sub-atomic particles in the nucleus. So the number of neutrons (3) remains the same

The reaction between C2H6 and Cl2 is by addition

Answers

The reaction between C2H6 and Cl2 by addition is C2H4Cl2 or dichloroethane. It must be under the presence of sunlight because halogen such as chlorine cannot easily react with the sigma bond of alkane such as ethane.

Answer:

addition

Explanation:

If a neutral atom has a mass of 12 amu and an atomic number of 5, determine the number of protons, neutrons, and electrons in the atom.

Answers

Answer:

Number of neutrons = 7

The number of protons = The number of electrons = 5

Explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

However, when we talk about the atomic number of the ion, it is not equal to the number of electrons as electron can be gained or loosed.

This is why, more appropriately, the number of the protons which are present in the nucleus of the atom is called the atomic number.

Thus, atomic number = 5

Since, it is a neutral atom, The number of protons = The number of electrons = 5

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons

12 =  5 + Number of neutrons

Number of neutrons = 7
Mass number = total protons + neutrons, and proton number = total protons (and therefore electrons, if not an ion.) Therefore: Neutrons = 12 - 5 = 7 Protons = 5 Electrons = 5

Ernest Rutherford's gold-foil experiment showed which of the following?

Answers

Ernest Rutherford's gold-foil experiment showed the density of atoms.
The experiment proved that most of an atom is empty space with a very small positively charged nucleus in the middle. 
So, from the given statements he following is true: 
Ernest Rutherford's gold-foil experiment showed the existence of a dense, positively charged center in an atom. 

Which statement describes the composition of potassium chlorate, KClO3?(1) The proportion by mass of elements combined in potassium chlorate is fixed.
(2) The proportion by mass of elements combined in potassium chlorate varies.
(3) Potassium chlorate is composed of four elements.
(4) Potassium chlorate is composed of five elements.

Answers

Answer : The correct option is, (1) The proportion by mass of elements combined in potassium chlorate is fixed.

Explanation :

The composition of any compound is studied on the basis of law of fixed proportion. This law stats that in a compound the elements are present in fixed proportion by their mass.

In the given options, the option (1) statement describes the composition of potassium chlorate.

While the other options (2), (3) and (4) statements does not describe the composition of potassium chlorate.

Hence, the correct option is (1).
The statement that best describes the composition of potassium chlorate, KCIO3 is " The proportion by mass of elements combined in potassium chlorate is fixed."
Other Questions
The total mass of the protons in an atom of gold-198 is approximately(1) 79 atomic mass units(2) 119 atomic mass units(3) 198 atomic mass units(4) 277 atomic mass units
Amines, amides, and amino acids are organic compounds containing the element:
The various components of a mixture or do not combine chemically true false
Which reactants form the salt CaSO4(s) in a neutralization reaction?(1) H2S(g) and Ca(ClO4)2(s)(2) H2SO3(aq) and Ca(NO3)2(aq)(3) H2SO4(aq) and Ca(OH)2(aq)(4) SO2(g) and CaO(s)