What is the chemical name of the compound represented by the formula Ni2O3? Use the list of polyatomic ions and the periodic tab
2 answers:
Answer : The chemical name of the compound is, nickel(III)oxide.
Explanation :
The rules for naming the chemical name of the compound :
- First element in the formula is named first and keep its element name.
- Gets a prefix if there is a subscript on it.
- Written the oxidation state by the us of roman numeral.
- Second element is named second.
- Use the root of the element name plus suffix (-ide).
- Always use a prefix on the second element.
In the given compound, the nickel is the cation and first element in the formula and the oxidation state of nickel is, (+3). The second element is oxygen which is named as oxide.
Thus, the chemical name of the compound is, nickel(III)oxide.
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Answer:- Molar mass of .
Solution:- It is a stoichiometry problem. Mass of the grill is 30.0 kg and the mass after burning the grill is also 30.0 kg. It means all the charcol is burned and the gas is given off.
2.0 kg of charcol are converted to grams which is 2000 g. Since charcol is pure solid carbon, the grams are divided by the atomic mass of carbon which is 12.
The combustion equation of charcol is written as:
From this balanced equation, there is 1:1 mol ratio between charcol and carbon dioxide. So, the moles of carbon dioxide gas formed are equivalent to the moles of charcol. To convert the moles of carbon dioxide to grams we multiply the moles by it's molar mass.
Carbon dioxide has one carbon and two oxygen atoms so it's molar mass = 12 + 2(16) = 12 + 32 = 44
So, 44 is the molar mass of carbon dioxide and above calculations clearly shows how and where we get this.