Atoms A and X are fictional atoms. Suppose that the standard potential for the reduction of X^2+ is +0.51 V, and the standard potential for the reduction of A^2+ is -0.33. Find the standard potential for an electrochemical cell with the cell reaction that follows.

Answers

Answer 1

Answer: While the reaction is not shown, based on those atoms and reduction potentials, the only reasonable favorable equation we can form is:

A(2+) + X -> A + X(2+)

The standard reduction potential for the cell is the cathode's reduction potential minus the anode's reduction potential, or 0.51-(-0.33)=0.84.

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Which element is classified as an alkali metal?

Answers

Explanation:

All the elements of group 1 in the periodic table are known as alkali metals. These are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (fr).

Characteristics of alkali metals are as follows.

Alkali metals are soft and can be cut with a knife.
They are good conductors of heat and electricity.
They have only 1 electron in their outermost sub-shell.
They are very reactive.
Alkali metals are ionic in nature.

The alkali metals are a group (column) in the periodic table consisting of the chemical elements lithium (Li), sodium (Na), potassium (K), [note 1] rubidium (Rb), caesium (Cs), [note 2] and francium (Fr).

How is the periodic table constructed ?

Answers

Before the periodic table, there were a bunch of symbols, number, letters etc (In all kinds of languages) that represented the elements. Scientists around the world saw that a chart of the elements needed to be universally accepted and finalized. A guy named Mendeleev presented this idea to the scientific community. Mendeleev was also the first to order elements according to atomic number rather than atomic weight. The modern day periodic table was not published by him, it was developed with the help of the entire scientific community. Honestly, there isn't a specific way to tell you how the periodic table was constructed, scientists developed thousands of tables that represented the elements. And just to let you know, the modern day periodic table is constantly going through changes as we discover more and more about elements, atoms, molecules etc. so in the near future it wouldn't be surprising if we saw something completely different than what we see today.

The Periodic Table is in order of electrons, and the columns are set up to show the amount of electrons in the outer most orbit.

What is the molar mass of Al2(SO4)3?150.03 g/mol 278.03 g/mol 342.17 g/mol 450.09 g/mol

Answers

Answer:

342.17 g/mol

Explanation:

Molecular formulas is the actual number of atoms of each element in the compound. Molecular mass is the sum of the mass of each element which is present in the molecular formula is multiplied by their subscript which appear in the molecular formula.

Given,

The formula is = $Al_2(SO_4)_3$

Mass from the formula = 2×Molar mass of Aluminium + 3×Molar mass of sulfur + 12×Molar mass of Oxygen

Molar mass of Aluminium = 27.00 g/mol

Molar mass of sulfur = 32.06 g/mol

Molar mass of Oxygen = 15.99 g/mol

So,

Mass from the formula = 2×27.00 + 3×32.06 + 12×15.99 g/mol ≅ 342.17 g/mol

The molar mass of $\rm Al_2(SO_4)_3$ is 342.17 g/mol. The correct answer is option C.

Molar mass is the mass of one mole of a substance. It is expressed in units of grams per mole (g/mol).

To calculate the molar mass of $\rm Al_2(SO_4)_3$ , we need to add up the atomic masses of all the atoms in one formula unit.

So, the molar mass of $\rm Al_2(SO_4)_3$ can be calculated as follows:

Molar mass = (2 × atomic mass of Al) + (3 × atomic mass of S) + (12 × atomic mass of O)

= (2 × 26.98 g/mol) + (3 × 32.07 g/mol) + (12 × 16.00 g/mol)

= 342.17 g/mol

Therefore, the answer is option C. 342.17 g/mol is the molar mass of $\rm Al_2(SO_4)_3$ .

Learn more about molar mass here:

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In the ground state, has only 1 electron in a p orbital.A. carbon
B. fluorine
C. hydrogen
D. nitrogen
E. aluminum

Answers

Aluminium is the element you are looking for

(E) Aluminium is the answer

How many moles of water will be generated during the combustion of 0.38 moles of methyl alcohol (CH3OH)? 2CH3OH + 3O2 2CO2 + 4H2O

Answers

You already got the balanced equation. So the ratio of mole number is the ratio of the coefficient. Then the ratio of methyl alcohol and water is 2:4=1:2. The water generated is 0.38*2=0.76 mol.

Answer:

0.76 moles

Explanation:

PLEASE HELP WILL GIVE BRAINLIEST

Answers

It’s the atomic number.

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