Answer:
a) 3.98 x 10^-10
Explanation:
Hello,
In this case, for the given pH, we can compute the concentration of hydronium by using the following formula:
![pH=-log([H^+])](https://tex.z-dn.net/?f=pH%3D-log%28%5BH%5E%2B%5D%29)
Hence, solving for the concentration of hydronium:
![[H^+]=10^{-pH}=10^{-9.40}\\](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D10%5E%7B-pH%7D%3D10%5E%7B-9.40%7D%5C%5C)
![[H^+]=3.98x10^{-10}M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D3.98x10%5E%7B-10%7DM)
Therefore, answer is a) 3.98 x 10^-10
Best regards.
The process that took place is called oxidation or burning where wood was burnt into ashes.
<h3><u>
Explanation:</u></h3>
Wood is an organic compound formed of different types of carbohydrates, proteins and lipids. These components do have carbon oxygen hydrogen as most abundant atoms and also has some amount of nitrogen, phosphorous, and other metal ions like magnesium, calcium etc.
When the logs were burnt, the chemical reaction took place between the atmospheric oxygen and the atoms present in the wood, forming different oxides. As carbon was the most abundant atom present, a huge smoke containing carbon dioxide and carbon monoxide evolved. The hydrogen became the water vapour, and other gases were also formed like nitrogen dioxide, sulphur dioxide etc. These gases went off into atmosphere. The rest that were left behind were mixture of unburnt part of wood as well as the solid metal oxides. There were unburnt particles of carbon mixed with them too.
Answer: The atomic mass in the periodic table is a weighted average of all naturally occuring isotopes of zinc.
Explanation: The elements consist of protons, neutrons, and electrons. Protons and nuetrons are assigned a mass of 1 amu (atomic mass unit). Electrons are too small to make a big difference in the mass, so they are assign a 0 for their amu. Since the elements consist of just these three particles, any one atom must add up to a whole number atomic mass. Zinc consists of 30 protons, by definition. A neutral atom has 30 electrons. The balance of a zinc atom is made up of neutrons. A Zn-65 atom would have 30 protons and 35 neutrons:
30 Protons = 30 amu
35 Neutrons = 35 amu
30 Electrons = 0 amu
Total AMU = 65
Any <em><u>ONE </u></em> Zn atom should have a whole number atomic mass. But zinc in the environment has isotopes of zinc - atoms that contain differing numbers of neutrons. A Zn-66 atom would have 36, instead of 35 neutrons. (P:30, N:36, E:0 = 66 amu). The atomic mass in the Periodic Table reflects the average of these isotopes as found in the environment. If the 65 and 66 isotopes were the only ones found naturally, an atomic mass of 65.38 would suggest around 60% of the atoms are Zn-65 and 40% are Zn-66. The average weight atomic mass would would be 65.40
Answer:
See image attached and explanation
Explanation:
I have attached a detailed mechanism of the reaction to this answer. This reaction occurs by SN1 mechanism. It implies that the transition state involves a carbocation.
However, the initial carbocation formed is a primary carbacation. Remember that the order of stability of carbocations is methyl< primary < secondary< tertiary. This means that tertiary carbocations are the most stable carbocations. Tertiary carbocations are those in which the carbon atom bearing the carbon atom is attached to three other carbon atoms.
In the mechanism below, the substrate converts from a primary to a tertiary cabocation (most stable) by a 1,2-alkyl shift as shown giving the 3-ethoxy-3-methylpentane product.
THIS IS A QUESTION REGARDING
![ideal \: gas \: equation](https://tex.z-dn.net/?f=ideal%20%5C%3A%20gas%20%5C%3A%20equation)
which states that
PV = nRT
where;
P : Pressure (atm)
V : Volume (litres)
n : Number of moles of that gas(mol)
R : Real gas constant = 0.0821
T : Temperature of that gas(Kelvin)
hope this helps