165000 s⁻¹ or 165000 Hertz (Hz)
<u>Explanation:</u>
Frequency can be found by dividing velocity in m/s by the wave length in m.
Frequency = v/λ
v is the velocity of the wave in meters per second = 330 m/s
λ is the wavelength of the wave in meters = 0.002 m
Frequency = 330 m/s / 0.002 m = 165000 s⁻¹ or Hz
Answer:
Option B. A reaction that removes essentially all H+ and OH-
Explanation:
A neutralization reaction is a reaction involving acid and base to form salt and water only. In this reaction, the H+ from the acid is completely neutralize by the OH-
From the base. Hence, we can a neutralization reaction is a reaction that removes the H+ and OH- from reactant to form water. This is illustrated below
NaOH + HCl —> NaCl + H2O
Ionically:
OH- + H+ —> H2O
From the above, we see clearly that the reaction removed the H+ from the acid and OH- from the base to form water.
Ethene belongs to class of
unsaturated hydrocarbons called as
Alkenes. Alkene contains a
double bond between two carbon atoms. And the general formula for alkene is,
CnH2nWhereas in Ethene, n = 2, so
C₂H₄
Therefore, in ethene there are two carbon atoms doubly bonded to each other via
one sigma and
one pi bond. Also each carbon atom is further covalently bonded to
two hydrogen atoms via sigma bond as shown below,
First, you need to know the molar mass of the compound. The compound Aluminum Sulfate has a molar mass of 342.15 g/mol. From the subscript of the compound, there are 4*3 = 12 moles of oxygen in 1 mole of the compound. The solution is as follows:
6.90 g Al₂(SO₄)₃*(1 mol/342.15 g)*(12 mol O/1 mol Al₂(SO₄)₃)*(6.022×10²³ atoms/mole) = 1.457×10²³ atoms of oxgyen
I believe it's Hirsutism, maybe list options if there are any next time! :)