41.What is the acid anhydride of H2CO3?
CO2
42.What is dipole dipole force?
Dipole dipole force is weak attraction that occurs between two polar molecules.
43.What is pH?
pH is the negative logarithm of hydrogen ion concentrated.
pH= -log [H+]
44.What are substrates?
A substrate is a surface on which a plant or animal grows or is attached.
45. What kind of bond does HCI have?
The bond between hydrogen and chlorine in HCI is polar covalent bond because of large electro negativity difference between the two bonded atoms.
46. What is the dipole moment direction for methanol?
The direction is towards the oxygen since the Oxygen atom has a much higher electronegative than either of the three Hydrogen atoms or the Carbon atom itself.
47. What is the difference between HCI acid and HCl gas?
HCI gas is molecular HCI in the gaseous phase, HCl acid is HCI in solution with water, and can be said to be in the form H+ Cl --.(Alternatively, to be a pendant, H 3 O+ Cl as technically protons does not exist on their own in solution.) It is this dissociation of the molecule into constituent ions, which gives an acid its properties.
On a physical level, HCl gas is a yellow/green gas, and HCl acid is a clear solution.
48.What is the pH of an Alkyl Halide?
The pH is usually on acidic side (i.e. pH < 7). The reason being, some of the alkyl halides tend to decompose via beta hydride elimination process generating hydro halo acids that impart acidity, e.g. tertiary butyl chloride decomposes to produce HCI or hydrochloric acid.
49. What is Chemical formula for glass?
Silica is one of the main components in glass. The chemical formula for Silica is Si02
50. What is a hydrogen bond?
A hydrogen bond is a special type of attractive interaction (perhaps a variation of a dipole dipole bond) that exists between an electronegative atom and a hydrogen atom bonde another electronegative atom. 15/32
This type of bond always involves a hydrogen atom, thus the name. Hydrogen bonds can occur between molecules(intermolecular) or within different parts of a single molecule(intra molecularly). The typical hydrogen bond is stronger than van der Waals forces, but weaker than covalent or ionic bonds.
51.What is the only known substance for which there is no triple point?
Helium
52.Convert 673 Kelvin into degrees centigrade?
400 degree C
53. What is an oxidizing agent?
Any chemical species that has a tendency to accept electrons and thereby undergoing Reduction themselves is known as an oxidizing agent
54. How do you prepare a solution of 1 M HCI?
Exactly how you prepare will depend on what you are starting with. Typically, to make a 1 M HCI solution, you will be starting with a stock solution of more concentrated HCl that you will then dilute.
55. Is DNA organic?
Of, relating to, or derived from living organisms: organic matter. Of, relating to, or affecting a bodily organ: an organic disease. In addition, DNA would chemically be considered organic since it contains carbon as the primary chemical backbone of the molecule.
56. How many electrons are in benzene?
There are 30 electrons in benzene. This includes 24 carbon electrons and 6 hydrogen electrons. There are 12 electrons shared between C and H, and 18 between C and C. (6 electrons in up ring, 6 in down ring and 6 between C and C).
57. What is a dipole moment?
Dipole moment is the measure polarity of a polar covalent bond. It is defined as the product magnitude of charge on the atoms and the distance between the two bonded atoms. Its common unit is debye and Sl unit is columb meter.
58. How many moles of HCI are present in. 70 L of a. 33 M HCl solution?
First, remember definition of M (moles), M = species / L. 0.33
M = 0.33 moles HC
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Then, multiple your volume by the molar concentration: 0.33 moles HCI / L x 0.70 L = 0.231 moles HCI
It is helpful to carry the units with your calculations. That way you can check that numerators and denominators cancel to give you the units of your answer.
59. How do you solve Ideal Gas Law problems?
The Ideal Gas Law is used to relate the pressure, volume, temperature, and amount of an ideal" gas. Although many gases are not ideal in reality, you can usually use the Ideal Gas Law anyway. Here is how you solve these problems!
The Ideal Gas Law is PV = nRT
60. Is HCI an acid or a base?
HCI, or hydrochloric acid, as the name implies, is an acid. In fact, it is considered a strong acid because it dissociates completely in water to form H3O+ and Cl
However, it can also act as a base in reactions with acids stronger than it can like HCIO4