For this you need the Atomic Mass of Al. Take the number of moles and multiply it by the atomic mass. Divide by one mole for units to cancel.
2.00 moles Al × (27.0 grams) = 54.0 grams Al
Because the molar mass of Aluminum is 26.98g/mol, 2 mols would be 53.96g.
2.1 (mol) * 27 (g/mol) = 56.7 g Aluminum
(27 g/mol is the molar mass of Aluminum)
4 moles aluminum (26.98 grams/1 mole Al)
= 107.92 grams aluminum
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( which, coincidentally, is the mass of 1 mole silver )
53.964 g
Well, one mole is 26.98 g, right? Your ten grams is thus (10/26.98) moles.
Steps to take: Write the chemical formula : Al2O3 Calculate the number of moles for aluminum oxide. You should know the formula which is the mass given (0.051g) divided by the Mass of aluminum oxide. Since there is '2' moles of Aluminium you multiplly the number of moles calculated for aluminum oxide by 2. Then you have calculated the number of Ions.
The atomic mass of Aluminium is 26.981539 amu
2,89 moles of aluminium contain 17,40398707673.1023 atoms.
Aluminium is a metal element. Atomic number of it is 13.
Well, one mole is 26.98 g, right? Your ten grams is thus (10/26.98) moles.
The mass of aluminium is 11,2 g.
The answer is 144,007 g for the anhydrous aluminium chloride.
Aluminium hydroxide, Al(OH)3 has molar mass 27.0+3(17.0) = 78.0Amount of Al(OH)3 = 39.0/78.0 = 0.500molThere are 0.5 moles of aluminium hydroxide in a 39.0g pure sample.
For this you need the atomic (molecular) mass of Al2O3. Take the number of grams and divide it by the atomic mass. Multiply by one mole for units to cancel. Al2O3= 102 grams408 grams Al / (102 grams) = 4.00 moles Al
Steps to take: Write the chemical formula : Al2O3 Calculate the number of moles for aluminum oxide. You should know the formula which is the mass given (0.051g) divided by the Mass of aluminum oxide. Since there is '2' moles of Aluminium you multiplly the number of moles calculated for aluminum oxide by 2. Then you have calculated the number of Ions.
To answer this first of all you need to know the equation of the reaction. 4Al + 3O2 ----> 2Al2O3 Then you need to know how many moles of aluminium you have mass = moles x molecular weight, therefore: moles = mass/ molecular weight. 38.8/21 = 1.85 (with rounding). This is the number of moles of aluminium you have. To work out how much oxygen is added you need to take the ratio of moles(O2:Al) from the equation (3/4 or 0.75) and multiply by the number of moles of aluminium 1.85 x 0.75 = (5.55/4). This is the number of moles of oxygen. I left it like this as it will be nicer to multiply out later. As you want the final mass you need to find the mass of oxygen added to the aluminium using mass = moles x molecular weight from before except as there are two oxygen atoms per molecule so the number needs to be doubled. (5.55/4) x (16 x 2) = 44.4g. This how much oxygen is added in the creation of aluminium oxide. To get the final total you add the amount of aluminium to the amount of oxygen added 38.8g + 44.4g = 83.2g
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The atomic mass of Aluminium is 26.981539 amu
2,89 moles of aluminium contain 17,40398707673.1023 atoms.
Aluminium is a metal element. Atomic number of it is 13.