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FromTheMoon [43]
2 years ago
7

The correct formula for a compound formed from the elements Al and O is

Chemistry
2 answers:
Mila [183]2 years ago
7 0
Most of metallic elements prefer being oxidized. At this form, they are most stable. In the case of aluminum metal, its stable form is aluminum oxide. Aluminum ion has +3 charge while an oxygen ion has -2 charge. By cross interaction, it will form Al2O3.
vredina [299]2 years ago
6 0

Answer : The correct formula for a compound formed from the elements Al and O is, Al_2O_3

Explanation :

Ionic compound : It is defined as the compound which is formed when electron gets transferred from one atom to another atom.

Ionic compound are usually formed when a metal reacts with a non-metal.

As we know that the aluminum is a metal and has 3 valence electron and oxygen is a non-metal and has 6 valence electrons.

When aluminum atom donate electrons to oxygen atom then it forms an ionic compound that is aluminum oxide.

Aluminum oxide is an ionic compound. It is made up of two different ions which are aluminum ion (Al^{3+}) and oxide ion (O^{2-}) by the criss-cross method. Thus, the correct chemical formula for aluminum oxide is Al_2O_3.

Hence, the correct formula for a compound formed from the elements Al and O is, Al_2O_3

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What is the molarity of a solution containing 8.9 g of NaOH in 550. mL of NaOH solution?
bulgar [2K]

Answer:

0.4 M

Explanation:

Molarity is defined as moles of solute, which in your case is sodium hydroxide,  

NaOH

, divided by liters of solution.

molarity

=

moles of solute

liters of solution

Notice that the problem provides you with the volume of the solution, but that the volume is expressed in milliliters,  

mL

.

Moreover, you don't have the number of moles of sodium hydroxide, you just have the mass in grams. So, your strategy here will be to

determine how many moles of sodium hydroxide you have in that many grams

convert the volume of the solution from milliliters to liters

So, to get the number of moles of solute, use sodium hydroxide's molar mass, which tells you what the mass of one mole of sodium hydroxide is.

7

g

⋅

1 mole NaOH

40.0

g

=

0.175 moles NaOH

The volume of the solution in liters will be

500

mL

⋅

1 L

1000

mL

=

0.5 L

Therefore, the molarity of the solution will be

c

=

n

V

c

=

0.175 moles

0.5 L

=

0.35 M

Rounded to one sig fig, the answer will be

c

=

0.4 M

Explanation:

6 0
2 years ago
What was the robotic vehicle Opportunity designed to do?
mestny [16]
I believe the answer is C
6 0
3 years ago
Read 2 more answers
Two positively charged objects (N pole) are separated by a large distance. One of the positively charged objects (N pole) is rep
Eddi Din [679]

Answer:

B

Explanation:

Applying law of electrostatic which states that like charges repel each other and unlike charges attract each other

N and S are unlike charges that turn and make the former repulsive force (due to two like charges N and N)to <em>reduce</em> and attractive force between N and S to <em>increa</em><em>se</em>

6 0
3 years ago
2. Which state of matter will take both the volume
Vikentia [17]

Answer:

The answer would be C) a liquid.

Explanation:

If you were to pour a glass of water into a rectangular container, the water would fill up the container and be in the same shape as the container. That is becuase water flows and it doesn't harden up or take its own shape until it's frozen. The molecules are not tightly secure to each other so they are able to move freely.

4 0
2 years ago
A slice of Swiss cheese contains 48 mg of sodium
Nookie1986 [14]

Answer: grams=0.048g, ounces=0.0017oz, 0.00011lb

Explanation:

Stoichiometry

48 mg x  1 g

          ÷  1000 mg  = 0.048 g

48 mg x  1 g            x 16 oz        

          ÷ 1000 mg  ÷ 453.6 g     = 0.0017 oz

48 mg x  1 g            x 1 lb        

          ÷ 1000 mg  ÷ 453.6 g     = 0.00011 lb

6 0
3 years ago
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