2 years ago

In a molecule, how do we show what types of atoms are there and how many atoms there are of each type.

1 answer:

6 0

Chemical or molecular formulas? Symbols from the periodic table are used to show which atoms are present in a molecule and subscripts show the number of atoms and of each type in the molecule.

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Consider the reaction. 2 Al ( s ) + Fe 2 O 3 ( s ) heat −−→ Al 2 O 3 ( s ) + 2 Fe ( l ) If 17.3 kg Al reacts with an excess of F

IrinaVladis [17]

Answer:

32.7 kilograms of aluminium oxide will be produced.

Explanation:

$2 Al ( s ) + Fe_2O_3 ( s ) +heat\rightarrow Al_2O_3 ( s ) + 2 Fe ( l )$

Mass of aluminum = 17.3 kg = 17300 g (1 kg = 1000 g )

Moles of aluminium = $\frac{17300 g}{27 g/mol}=640.74 mol$

According to reaction, 2 moles of aluminum gives 1 mole of aluminum oxide,then 640.74 moles of aluminum will give:

$\frac{1}{2}\times 640.74 mol= 320.37 mol$ of aluminum oxide

Mass of 320.37 moles of aluminum oxides:

320.37 mol × 102 g/mol = 32,677.74 g = 32.67774 kg ≈ 32.7 kg

32.7 kilograms of aluminium oxide will be produced.

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2 years ago

An astronaut in her spacesuit weighs 300 lb on earth. What would her weight be on the moon?

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She would be 150 on the moon because the moon has half the mass of earth

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HELP ASAP<br><br> Describe the function of Cytokinesis in the cell cycle.

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Cytokinesis ensures that one nucleus ends up in daughter cells during cell division

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Sound generally travels faster through solids than through gases because the particles (atoms or molecules) of a solid are _____

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Either closer or denser

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2 years ago

At 25 °C, what is the hydroxide ion concentration, [OH−] , in an aqueous solution with a hydrogen ion concentration of [H+]=4.8×

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1 year ago

In a molecule, how do we show what types of atoms are there and how many atoms there are of each type. ​

In a molecule, how do we show what types of atoms are there and how many atoms there are of each type.