Answer:
120 mol Mg
General Formulas and Concepts:
<u>Chemistry - Stoichiometry</u>
- Using Dimensional Analysis
Explanation:
<u>Step 1: Define</u>
120 moles H₂
<u>Step 2: Identify Conversions</u>
RxN: 3 mol H₂ = 3 mol Mg
<u>Step 3: Stoichiometry</u>
<u />
= 120 mol Mg
Answer:
Eu(ClO3)3
Explanation:
The chlorate ion is written as follows, ClO⁻ ₃. We can see from this that the ion is univalent.
From the formula, Eu203, it is easy to see that the europium ion is trivalent.
Hence, when a compound is formed between the europium ion and chlorate ion, the compound will be written as Eu(ClO3)3.
This is so because, when ionic compounds are formed, there is an exchange of valence between the ions in the compound. This gives the final formula of the ionic substance.
It depends on the mixed compounds for the taste of the resulting mixture.
Answer:
Property Family Group
react vigorously with metals halogens 17
can be cut with a knife alkaly metals 1
don't react with any other elements noble gases 18
Explanation:
<u>Noble gases</u> are placed in the group 18 of the periodic table. This family is formed by He, Ne, Ar, Kf, Xe, Rn, and Og. Since they have their valance shell complete, they tend to not react with other elements. Nevertheless, nowadays it is known that they can form some compounds.
<u>Alkaly metals</u> are placed in the the group 1 of the periodic table. This family is formed by Li, Na, K, Rb, Cs, and Fr. They have 1 valence electron which makes them the most active metals. They are known because they are soft and can be cut by a knife, like they were butter.
<u>Halogens </u>are placed in the group 17 of the periodic table, This family is formed by F, Cl. Br, I, At, and Ts. They have seven valence electrons, which make them very active and ready to combine with metals either covalently or ionically.
B. 203.6 g/mol hope this helps
