Which phrase describes the molecular structure and properties of two solid forms of carbon, diamond and graphite?(1) the same molecular structures and the same properties(2) the same molecular structures and different properties
(3) different molecular structures and the same properties
(4) different molecular structures and different properties
Answers
Answer is: (4) different molecular structures and different properties.
Different forms of the same element that have different properties because of different atom arrangements are called allotropes.
Carbon has many allotropes, but two most important are graphite and diamomd.
Graphite has sp2 and diamond has sp3 hybridization of carbon atoms, because of that graphite conduct electricity and diamond not.
In diamond carbon atoms are arranged in the face centered cubic crystal structure called a diamond lattice.
Diamond has very strong covalent bonds between carbon atoms and because of that it has the highest hardness and thermal conductivity of any bulk substance.
Related Questions
In the following reaction, C6H6)? 2C6H6 + 15O2 12CO2 + 6H2O, how many grams of oxygen will react with 10.47 grams of benzene?
What element has the electron configuration 1s2 2s2 2p6 3s2 3p2?
The process of a material going through a change of state from a gas to a liquid is called
Which provides evidence to support the big bang theory? A. the change in carbon dioxide levels in the atmosphere B. the composition of the sun C. the red-shift of distant galaxies D. the magnetization of rocks on the ocean floor
fusion
chemical
ionic
Answers
Answer: The correct answer is fusion reaction.
Explanation:
Nuclear fission reaction is defined as the reaction in which a heavier nuclei dissociates into two or more lighter nuclei.
Nuclear fusion reaction is defined as the reaction in which lighter nuclei combines to form a heavier nuclei.
Chemical reaction is defined as the reaction in which change in composition takes place. A new substance gets formed in this type of reaction.
The chemical equation for the formation of helium-4 atom follows:
In the above reaction, two hydrogen nuclei are combining together to form a heavier nuclei which is helium atom.
Thus, the correct answer is fusion reaction.
Answers
Answers
petroleum based is materiel's that contains different kinds of oil and fuel. "which are used in chemical processes to produce plastics".
Answers
Explanation:
It is known that one mole of chromium or molar mass of chromium is 51.99 g/mol.
It is given that number of moles is 11.9 moles.
Therefore, calculate the mass of chromium in grams as follows.
No. of moles =
mass in grams = No. of moles × Molar mass
= 11.9 moles × 51.99 g/mol
= 618.68 g
Thus, we can conclude that there are 618.68 g in 11.9 moles of chromium.
1mole ----- 52g Cr
11,9moles --- x
x = 11,9*52/1 = 618,8[g]
B) compound
C) mixture
D) solution
Answers
B) compound is a pure substance
Further explanation
A pure substance can be an element or compound.
The element is a single substance that cannot be broken down anymore or the simplest substance.
While the compound is a pure substance that is formed from a combination of two or more elements through chemical reactions and has a constant chemical ratio.
A mixture is a combination of two or more single substances. The properties of the mixture component are not lost / unchanged as in compounds.
The mixture can be divided into a homogeneous mixture if the composition / ratio of each substance in the mixture is the same and heterogeneous mixture if the ratio of the composition of the substances is not the same (can be varied) in each place.
Mixtures can also be divided into solutions, suspensions and colloids based mainly on the size of the particles
- A) alloy
alloy is a mixture of elements that have metal properties
- B) compound
Compounds are represented in chemical formulas which can be separated into their constituent elements by chemical processes
- C) mixture
can be separated by physical or mechanical means, the composition can be changed depending on the proportion of pure substances that form it
- D) solution
Solution is: a mixture of two or more substances consisting of a solute and a solvent. The particle size of the solution is very small, less than 1 nm.
Learn more
A heterogeneous mixture
a homogeneous mixture
an example of a physical change
Answers
Answer:
The mole, symbol mol, is the SI unit of amount of substance.
Explanation: