The chemical bonding in sodium phosphate, Na3PO4, is classified as:
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Final answer:
The type of chemical bonding in sodium phosphate (Na3PO4) is ionic bonding. This is due to the transfer of electrons from sodium atoms to a phosphate group, forming ions which then attract one another to create a balanced, electrically neutral compound.
Explanation:
The chemical bonding in sodium phosphate (Na3PO4) is classified as ionic bonding. Ionic bonding involves the transfer of electrons from one atom to another, resulting in the formation of ions. This occurs between atoms of different electronegativities, typically a metal and a non-metal. Atoms lose or gain electrons to attain a stable, full outer electron shell.
In sodium phosphate, three sodium (Na) atoms each donate an electron to become positively charged ions (cations). The phosphate (PO4) group accepts these electrons to become a negatively charged ion (anion). The electrostatic attraction between the positive sodium ions and the negative phosphate ion forms the ionic bond. These discrete units assemble in a three-dimensional lattice structure in a way that ensures the overall compound is electrically neutral.
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Consider the reaction: 2 H2O (g)-->2 H2 (g) + O2 (g). ΔH=483.6 Kj/mol. If 2 moles of H2O (g) are converted H2(g) and O2(g) against a pressure of 1 atm at 125 degrees Celcius what is ΔE of reaction?
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Answer:
Ksp = [La3+]2[CO32–]3.
Explanation:
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There are 0.154 moles of atoms in 2.00 g of carbon-13.
Further Explanation:
Moles, Atomic mass and Molecular mass
- 1 mole of a pure substance contains a mass that is equal to the relative atomic mass or molecular mass of the substance.
- Therefore; molar mass is given as grams per mole of a substance
Hence;
Molar mass = mass of a substance/ Number of moles
g/mol = g /mole
Thus;
- M = m/n; where M is the molar mass, m is the mass and n is the number of moles
- From this relationship we can therefore, calculate mass by multiplying the number of moles by molar mass of a substance.
That is; Mass = moles x molar mass
- To calculate number of moles;
We have; n = m/M
Number of moles = Mass of the substance/ Molar mass
- In our case;
Mass = 2 g of Carbon-13
Molar mass = 13.0 g/mol
Since; Number of moles = Mass/ molar mass
Thus;
Moles = (2.0 g)/ (13.0 g/mol)
= 0.154 moles
Keywords: Moles, Molecular mass, relative atomic mass
Learn more about:
- Relative atomic mass: brainly.com/question/11096711
- Moles calculation: brainly.com/question/9709257
- Molar mass: brainly.com/question/8992028
Level: High school
Subject: Chemistry
Topic: Moles
Sub-topic: Moles, molecular mass and mass of a pure substance.
B. The subscript 2 indicates that two atoms of oxygen are present in the substance.
C. The chemical symbol Al indicates that oxygen is present in the substance.
D. The subscript 2 indicates that two atoms of aluminum are present in the substance
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Final answer:
In the formula Al2O3, the subscript 2 indicates the presence of two atoms of Aluminium, and the subscript 3 indicates the presence of three atoms of Oxygen.
Explanation:
The formula Al2O3 is for aluminium oxide. The coefficient and subscript in this formula tell us about the number of atoms of each element present in the compound. In this case:
- The chemical symbol Al indicates the presence of Aluminium.
- The subscript 2 (in Al2) indicates that there are two atoms of aluminum present in the substance.
- The chemical symbol O indicates the presence of Oxygen.
- The subscript 3 (in O3) indicates there are three atoms of oxygen present in the substance.
So, the correct answer to the question is, the subscript 2 indicates that two atoms of aluminum are present in the substance (option D).
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Question
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Answer:
The answer is D
(2) distillation
(3) electrolysis
(4) filtration
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Answer : Option 3) Electrolysis.
Explanation : In the process of electrolysis, decomposition of the chemical is done by passing the electric current from the liquid or the solution containing ions in it. This is the process where compound is broken into ions namely, cations and anions.
Rest all options does not involves chemical decomposition of the compound.
Chromatography is a technique where rates of solute and solvent are compared in a medium where the solute components move at different rates and the separation is obtained.
Distillation simply purifies the liquid or solution by heating or cooling process.
Filtration just involves removal of impurities by using a more porous material device to get purified compound.
Answer:
The correct answer is option (3).
Explanation:
Electrolysis is defined as chemical process in which decomposition is carried out by passing an electricity in a solution containing ions. For example: electrical decomposition of water gives oxygen gas and hydrogen gas.
where as chromatography, distillation and filtration are the separation techniques used to separate the compounds from the mixtures.
Hence, the correct answer is option (3).