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Chemistry Questions and Answers (Q&A)

Hey John,

That is incorrect. The answer is methane because there is one carbon in the molecule

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This question is incorrect. The formula of velocity is V=d/t, V being velocity, d being distance and t being a period of time. Velocity has nothing to do with the mass of an object, but rather the amount of distance it can travel in a determinedperiod of time.

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Phosphorus is one of the elements that you can find in the periodic table of elements. This is also the element that has the ability to expand its valence shell. This means that aside from the usual 8 electrons, it can hold more than that. Phosphorus is known to be highly reactive. You use it often but you may not be aware of it.

Every time you use a match, the red area that you use to strike and create fire contains phosphorus. Take note that phosphorus can also be found in certain food products as long as it is natural phosphorus. Some phosphorus can work as additives that will make people crave certain food products more than others.

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The lattice energy is the energy released when the lattice is formed. It can also be the energy required to break the lattice bonds. These can be covalent or ionic bonds. Depending on the forces between them, the different bonds need specific energy.

In the choices given Al2O3 have the highest number of bonds between them required to create the strong gest attractions which gives the lattice a higher lattice energy. In comparison the remaining structures don’t have sufficiently strong bonds to have a high lattice energy. This means that a lot of energy is required to break these bonds and melt the lattice.

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The correct answer to this question is C. An enantiomer is also known as an optical misnomer, and it is each of a pair of molecules that are mirror images of one another; these molecules are non-superimposable. Diastereomers are a type of stereoisomer, and are defined as non-mirror image non-identical stereoisomers and are also non-superimposable.

A diastereomer is any stereoisomer that is not an enantiomer. Diastereomers often have different chemical reactivity as they have different physical properties. The diagram in this question does not fit into either of these categories, so therefore it is the same compound, or answer C.

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Chiral becues they are non superimposiple

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NF3 has a trigonal pyramidal structure. Nitrogen has three bonds with fluorine and the presence of one lone pair. There is a good amount of polarity due to the electronegativity differences in both atoms. Nitrogen develops a semi-positive charge and the fluorine ions develop semi-negative charges. The lone pair is responsible for the pyramidal structure without whose presence would be trigonal planar.

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Carbocations in chemistry is known as the carbon atoms that are positive and are ions. Hence, the name is similar to the description of carbocations. These are believed to be alkanes and can donate to H+. It may seem unusual because most alkanes are known for being lazy, so to speak, these are more active.

This atom has six electrons. These are located in the outer part of the atom. It contradicts the octet rule that this type is known for because the octet rule has eight electrons. The atom is expected to increase in stability and it would best be known based on the diagram of each part of the carbocation process.

In this case, the rank of these diagrams would be with diagram A first, diagram B would be second and diagram D would be third.

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The heat capacity of the metal is affected by a couple of things. First, the water is going to cool it off. There is no getting around that. By doing that, the water gains the heat that it has taken from the metal. The previous answer says that it is 0.25 J/g/C.

There’s a formula to find the answer. You simply find the heat released by the metal, and what’s been absorbed by the water. Since the temperature of the water has risen, there is obviously some form of heat being absorbed. However, I am no chemist and I couldn’t find a specific formula for this problem on the internet. Chemists out there, feel free to add to this response.

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The correct answer to this question is B, chordate. It is apart of the kingdom animalia and apart of the subkingdom eumetazoa. It also belongs to the subgroups cephalochordata, olfactores, and vetulicolia. Chordates are defined by five features, including a dorsla nerve cord, notochords, post-anal tail, endostyle, and pharyngeal sits.

These fossils have been discovered 541 million yeas ago, during the Cambrian explosion. The various types of chordates are divideded into three types called subphyla. The first is vertebrata, which includes fish, mammals, and birds. The second is tunicatas, which includes salps and sea squirts. The last is cephalochordata which includes lancelets.

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