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Oksi-84 [34.3K]
2 years ago
12

Choose the products that complete the reaction . The chemical equation may not be balanced . Al+H 2 SO 4 ? Al 2 (SO 4 ) 3 +H 2 O

Al 2 (SO 4 ) 3 +CO 2 +H 2 OAl 2 (SO 4 ) 3 +H 2
Chemistry
1 answer:
alexandr402 [8]2 years ago
5 0

Answer: Al2 (SO4)3 + H2

Explanation:

option C

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A 14.3 g sample of HF is dissolved into 250 mL of solution. The concentration of the solution is *
STALIN [3.7K]

Answer:

The concentration of the solution is 2.86 M

Explanation:

Molarity is a unit of concentration based on the volume of a solution. It is defined as the number of moles of solute that are dissolved in a given volume. In other words, molarity is defined as the number of moles of solute per liter of solution.

The Molarity of a solution is determined by the following expression:

Molarity (M)=\frac{number of moles of solute}{Volume}

Molarity is expressed in units (\frac{moles}{liter}).

In this case, you must then know the number of moles of HF, for which you must know the molar mass. Being:

  • H: 1 g/mole
  • F: 19 g/mole

the molar mass of HF is: HF= 1 g/mole + 19 g/mole= 20 g/mole

Then the following rule of three applies: if 20 g of HF are available in 1 mole, 14.3 g in how many moles will they be?

moles=\frac{14.3 g*1 mole}{20 g}

moles= 0.715

So:

  • number of moles of solute: 0.715 moles
  • Volume: 250 mL=0.250 L (being 1 L=1000 mL)

Replacing:

Molarity=\frac{0.715 moles}{0.250 L}

Solving:

Molarity= 2.86 \frac{moler}{liter}=2.86 M

<u><em>The concentration of the solution is 2.86 M</em></u>

6 0
2 years ago
B) Ethane has the formula C2H6. In terms of electronic structure,
k0ka [10]

Answer:

There is one single covalent bond between two carbon atoms.

Explanation:

We know that sharing of electrons form covalent bonds.

If we look upon K,L,M ,N shells of the carbon and hydrogen atoms.

We found that Hydrogen is having only  1 electron in K shell.

And Carbon on the other hand is having 2 electrons in K shell and 4 electrons in L shell.

So carbon have  4 valence electrons,and it can share 4 bonds with any relevant atom to complete its octet.

And Hydrogen requires  1 electron to complete its doublet.

Alkane general formula C_{n}H_{2n+2}

For ethane n=2

C_{2}H_{4+2} = C_{2}H_{6}

1 Carbon atom is shared by  3 Hydrogen.

The remaining one electron (4-3)=1 of carbon will be shared with another carbon atom.

An image of the sharing of electrons attached below,

Hence we have only  1 covalent bond between the two.

5 0
3 years ago
How much energy is needed to raise the temperature of 2g of water 5°C
Scilla [17]

Answer:this case, the mass is 2.0g, the specific heat capacity of water is 4.18J/g/K, and the change in temperature is 5.0°C=5K , therefore the energy needed to raise it is: 5×2×4.18=41.8J

Explanation:

3 0
11 months ago
Is it possible to tell if an acid or base is strong or weak just by looking at its chemical formula?
Gre4nikov [31]
It is.

An acid will be strong when its conjugated base is highly stable, and vice-versa.

That can occur for instance through electronic delocalization.
8 0
2 years ago
Which of the following are diatomic elements? Select all that apply.
TiliK225 [7]

Answer:

C

Explanation:

A diatomic element in that list is Bromine

8 0
2 years ago
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