September Admission 2019/2020 into Accra Institute of Techonology, Ghana - Undergraduate Programs

1)Gas which dissolve in ammonical copper(1) chloride but insoluble in water is? 2)producer gas is...

1)Gas which dissolve in ammonical copper(1) chloride but insoluble in water is?
2)producer gas is a gas with a low heating power because it contains more?
3)it is dangerous to stay in a badly ventilated room which has a charcoal because of the presence of?
4) the property of graphite that makes it a good lubricant is it's?
5)element in the same group of the periodic table have?
6) s-block element of the periodic table are made up of?
7) ionization energy of an atom is affected by?
8) element in the same group in the periodic table have the number?
9) anything in the titration of acid against base solution average must involve?
10) solution produced in the conical flask after each tradition containing salt and water is called?

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Answers (1)

isaaq
3 months ago
8.So, on the periodic table groups are sorted into 18 different columns, which represents how stable the element is. For example, the elements to the right groups ofthe table, such as lithium, sodium and so forth, are muchless stable than those on the right side of the table, such as the noble gases (helium, neon e.t.c). This is because of the proton charge they have.

6.The s-block elements are the 14 elements contained within these columns.
All of the s-block elements are unified by the fact that their valence electrons (outermost electrons) are in an s orbital.
The s-block elements are made up of hydrogen (H), helium (He), lithium (Li), beryllium (Be), sodium (Na), magnesium (Mg), potassium (K), calcium (Ca), rubidium (Rb), strontium (Sr), cesium (Cs), barium (Ba), francium (Fr) and radium (Ra).The periodic table shows exactly where these elements are within the s-block

7.There are basically three:
1.Nuclear charge: The larger the atomic number, the higher the amount of charge at the nuclei, and therefore the strongest the attraction that it exerts into its electrons. This therefore implies a higher ionization energy. This is why along a period, ionization energy usually increases from left to right, because the nuclear charge of the atom increases.
2.The number of energy levels filled: Ionization will always occur from the highest in energyatomic orbital occupied, that is the most external. Therefore, the higher the number of energycores filled, the lowest the ionizationenergy. This is why in a group, ionization energy decreases as we move from the top tothe bottom. For Li, the released electronfrom ionization comes from the second energetic level, for Na it is from the third, for K itis for the fourth…
3.Electronic repulsion: The highest the electronic charge of an atom, the highest the electronic repulsion it will present and therefore it will be more favored to release one of those electrons to reduce the electronic density. In other words, if the electronic density of a atom increases, itsionization energy will decrease and if it decreases it will increase. This is whycations have higher ionization energies than their correspondent neutral atoms. Releasing an electron decreases the electronic repulsion in the cation, making it even more difficult torelease a new electron than the first one (note that another effect to takeinto consideration inthis case is whether or not the second released electron comes from a different energetic level than the first one, as it happens in all alcaline elements)

4.Graphiteis a mineral made of loosely bonded sheets of carbon atoms, giving it a slippery texture that makes it a very effective lubricant.
This slippery quality also makes graphite a good material for pencil lead because it easily sloughs off onto paper.

3.it's because when coal is burnt it emits lots of smoke which contains high amount of carbon monoxide . So when you sleep in a closed room with burning coal the air you inhale is carbon monoxide which is obviously not good for humans .
After sitting in that room ( closed room) for some time you will start feeling dizzy may cause headache also , sleeping in that room is extremely dangerous as there are many cases where people sleeping in closed room with burning coal have died due to inhalation of carbon monoxide.
Hence it is not advisable to sleep with burning coal in closed room

2.Producer gas is fuel gas that is manufactured from material such as coal, as opposed to natural gas. A combustible mixture of nitrogen, carbon monoxide, and hydrogen, generated by passing air with steam over burning coke or coal in a furnace and used as fuel.
so it contains more coal.

1.Methane, Nitrogen, Hydrogen,Helium and neon gases are the most insoluble pure gases.
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