Answer:
There are four ways to find the charge of an element:
Use the periodic table. The usual charge of an element is common to its group. ...
Use a chart. ...
For a single atom, the charge is the number of protons minus the number of electrons.
Find the charge by balancing charge in a compound
The major groups of minerals includes: carbonate ions and oxides, . In addition to this three groups the following are also the major groups of minerals
native elements
sulfate
sulfides
halides
silicate
nitrate among others such as phosphate and vanadate
Answer:
600k
Explanation:
In this problem, we need to use a gas law that relates temperature to volume. The gas law to use here is the Charles’ law.
The Charles’ law posits that temperature and volume are directly proportional, provided that the pressure is kept constant.
Mathematically:
V1/T1 = V2/T2
We are looking at getting V2, hence we can write the mathematical equation as:
T2 = V2T1/V1
Asides the fact that we know that the gas is monoatomic, we do not know its volume. Let its initial volume be v. Since it expanded adiabatically, this means that its new volume is 2v
Hence: V1 = v , V2 = 2v , T1 = 300k and T2 is ?
Substituting these values, we have the following:
T2 = (2v * 300)/v
T2 = 600k
Answer:
KOH(aq) + HCl(aq) ——-> KCl(aq) + H2O(l)
Explanation:
A neutralization reaction is the chemical reaction between an acid and an alkali to yield salt and water only.
In this particular question, the acid is hydrochloric acid while the alkali is potassium solution. We now write the equation of reaction as follows:
KOH(aq) + HCl(aq) ——-> KCl(aq) + H2O(l)
The salt formed here is KCl otherwise called potassium chloride
Iron is the element that is not in the cobalt subgroup.
