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3 years ago

_Al(s) + - 02(g) → _Al2O3 (s) Balance equation

Chemistry

1 answer:

AfilCa [17]3 years ago

6 0

Explanation:

Chemical reaction

When two or more substances react and form some new substance it is called as chemical reaction .

For example :

Al (s) + O₂ (g)----> Al₂O₃(s)

Chemical equation

It is the representation of chemical reaction in terms of symbols ,molecular formulas ,moles , states etc .

As we know all chemical reaction obeys law of chemical combination therefore chemical reaction need to be balanced .

Law of conservation of mass

Mass can neither be created nor be destroyed in a chemical reaction , it is always conserved .That is why reactions need to be balanced .

Let us balance

Al (s) + O₂ (g)----> Al₂O₃(s)

After balancing , it becomes :

2Al (s) + 3/2O₂ (g)----> Al₂O₃(s)

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If a sample of hydrogen gas was collected over water. If the total pressure 7 points

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Answer:

53.3

Explanation:

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3 years ago

2Al + 6HCl --> 2AlCl3 + 3H2 Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L

dem82 [27]

Answer:

8.8g of Al are necessaries

Explanation:

Based on the reaction, 2 moles of Al are required to produce 3 moles of hydrogen gas.

To solve this question we must find the moles of H2 in 11L at STP using PV = nRT. With these moles we can find the moles of Al required and its mass as follows:

Moles H2:

PV = nRT; PV/RT = n

Where P is pressure = 1atm at STP; V is volume = 11L; R is gas constant = 0.082atmL/molK and T is absolute temperature = 273.15K at STP

Replacing:

1atm*11L/0.082atmL/molK*273.15K = n

n = 0.491 moles of H2 must be produced

Moles Al:

0.491 moles of H2 * (2mol Al / 3mol H2) = 0.327moles of Al are required

Mass Al -Molar mass: 26.98g/mol-:

0.327moles of Al * (26.98g / mol) = 8.8g of Al are necessaries

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3 years ago

Please help y’all I don’t understand

VashaNatasha [74]

Answer:

Explanation:

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3 years ago

Read 2 more answers

Is this the right answer to this question....?

givi [52]

Transport of Na+ from a place of low concentration to a place of higher concentration. This is the right answer.

The sodium-potassium pump is the most common and well-known example of active transport. At the cell membrane, the sodium-potassium pump moves 3 sodium ions out of the cell and two potassium ions into the cell per ATP. Examples of active transport include the uptake of glucose in the human intestine and the uptake of minerals and ions into the root hair cells of plants.

One of the greatest examples of active transport is the movement of calcium ions out of cardiomyocytes. Cells secrete proteins such as enzymes, antibodies, and various other peptide hormones. Amino acids are transported across the intestinal mucosa of the human intestine. The movement of ions or molecules across cell membranes to regions of a higher concentration is assisted by enzymes and requires energy.

Learn more about Active transport here:-brainly.com/question/25802833

#SPJ1

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1 year ago

what would you be most likely to measure by immsering and object in water and seeing how much the water level rises

Katena32 [7]

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