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zhannawk [14.2K]
3 years ago
15

How many grams of oxygen is needed to completely react with 9.30 moles of Al

Chemistry
1 answer:
Serggg [28]3 years ago
8 0

Answer: 223.2 grams

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

4Al+3O_2\rightarrow 2Al_2O_3

According to the given balanced equation:

4 moles of Aluminium reacts with 3 moles of oxygen .

Thus 9.30 moles of Aluminium reacts with=\frac{3}{4}\times 9.30=6.975moles of oxygen.

Mass of Oxygen gas = Moles × Molar mass = 6.975mole × 32 g/mol = 223.2 g

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At 450 mm Hg a gas has a volume of 760 L, what is its volume at standard pressure​
KatRina [158]

Answer:

450.0 L.

Explanation:

  • We can use the general law of ideal gas: <em>PV = nRT.</em>

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

  • If n and T are constant, and have different values of P and V:

<em>(P₁V₁) = (P₂V₂).</em>

<em></em>

V₁ = 760.0 L, P₁ = 450.0 mm Hg,

V₂ = ??? L, ​P₂ = 760.0 mm Hg (standard pressure = 1.0 atm = 760 mm Hg).

∴ V₂ = (P₁V₁)/(P₂) = (760.0 L)(450.0 mm Hg)/(760.0 mm Hg) = 450.0 L.

5 0
4 years ago
3 miles of NaCl in 12 liters of water <br> What is the molarity
lesya [120]

Answer:

12 \: litres \: contain \: 3 \:  \: moles \: of \: sodium \: chloride \\ 1 \: litre \: will \: contain \:  \frac{(1 \times 3)}{12} moles \\  = 0.25 \: mol \:  {l}^{ - 1}

Explanation:

12 \: litres \: contain \: 3 \:  \: moles \: of \: sodium \: chloride \\ 1 \: litre \: will \: contain \:  \frac{(1 \times 3)}{12} moles \\  = 0.25 \: mol \:  {l}^{ - 1}  \\ or : 0.25 \: M

8 0
3 years ago
Read 2 more answers
What is an alloy?<br> Answer question 2 if you want.
Anna11 [10]

Answer:

An alloy is a combination of metals or metals combined with one or more other elements. For example, combining the metallic elements gold and copper produces red gold, gold and silver becomes white gold, and silver combined with copper produces sterling silver. Elemental iron, combined with non-

Explanation:

that's what an alloy is all the rocks including gold silver combined with copper  and sterling silver

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3 years ago
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Each of the following names is wrong. Draw structures based on them, and correct the names:(b) 1,1,1-trimethylheptane
devlian [24]

The correct IUPAC name of 1,1,1-trimethylheptane is 2,2-dimethyloctane.

<h3>IUPAC NAME:</h3>

It is systematic way of nomenclature of organic compounds.

It is based on the position of functional groups, preference of the functional group, long or short chain of carbon, preference of double bond, single and triple bond, branching of carbon chain, etc.

The given compound is 1,1,1-trimethylheptane.

The given name is wrong according to IUPAC name because the numbering of carbon atom should be done in that way in which the carbon atom chain is largest.

Here, in this case the numbering is done from right side. Thus the largest carbon chain have 8 carbon atom.

If the numbering is done according to the question, number of carbon atom in straight chain is 7.

Thus, we concluded that the Correct IUPAC name of 1,1,1-trimethylheptane is 2,2-dimethyloctane.

learn more about Nomenclature:

brainly.com/question/14094007

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2 years ago
What are the two toxic byproducts of incomplete combustion?
masha68 [24]

Answer:

The answer is option D, that is, carbon and carbon monoxide

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3 years ago
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