Answer:
5.4 tonnes.
Explanation:
The first step is to find the molar mass of Al2O3. Aluminum has a molar mass of about 27 and oxygen has a molar mass of about 16, so 2(27)+3(16)= 102g/mol=0.102kg/mol. 10200kg/0.102kg/mol=100,000 moles of Al2O3 in 10.2 tonnes. Multiplying this by the molar mass of the two aluminums, you get a total of 54*100,000=5400000g=5400kg=5.4 tonnes. Hope this helps!
Mole to Mole.
Assuming you're referring to converting in general, there must always be a mole to mole conversion.
Gram to gram would be incorrect as you must have a molar conversion in order to do so.
Gram to mole would be incorrect because that would leave out molecular conversions which would require three steps rather than two.
Mole to molecule is incorrect as it leaves out grams, depending on the circumstances and equation provided.
Thus, through process of elimination, mole to mole is the correct answer.
Hope this helps!
No, it doesn’t react to water.
Answer:
% oxygen = 47.1 %
% aluminium = 52.9 %
Explanation:
Step 1: Data given
Mass of aluminium = 2.70 grams
Mass of aluminium oxide = 5.10 grams
Step 2: The balanced equation
4Al + 3O2 →2Al2O3
Step 3: Calculate mass of oxygen
The law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products.
Mass oxygen + mass aluminium = mass aluminium oxide
Mass oxygen + 2.70 grams = 5.10 grams
Mass oxygen = 5.10 grams - 2.70 grams
Mass oxygen = 2.40 grams
Step 4: Calculate percent composition
% oxygen = (mass oxygen / mass aluminium oxide) * 100 %
% oxygen = (2.40 grams / 5.10 grams ) * 100 %
% oxygen = 47.1 %
% aluminium = (mass aluminium / mass aluminium oxide)
% aluminium = (2.70 grams / 5.10 grams ) * 100 %
% aluminium = 52.9 %
47.1 % + 52.9 % = 100 %
The characteristic of atoms is
They are the smallest units of matter
<u><em> Explanation</em></u>
Atoms are the smallest constituent units of matter and they have properties of chemical elements.
Atoms can not be broken by any chemical means.
Atoms of an elements combine together to form compound.
In addition atoms consist nucleus of positively charged protons, neutral neutrons with negatively charged electrons.