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Mashcka [7]
3 years ago
14

Which element has the same number of valence electrons as oxygen. Neon sulfur fluorine nitrogen

Chemistry
1 answer:
Dovator [93]3 years ago
5 0
Sulfur has the same amount, like all the other elements in group 16, has six valence electrons.
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Lemon juice has a pH of about 2.0, compared with a pH of about 1.0 for stomach acid. Therefore, the concentration of H+ in stoma
LuckyWell [14K]

Answer:

The concentration of H⁺ in stomach acid is approximately ten times greater than that of lemon juice.

Explanation:

The H⁺ concentration of a solution is exponentially related to its pH value:

\rm [H^{+}] = 10^{-pH}.

For lemon juice:

\rm [H^{+}] = 10^{-2.0} = 0.01\; M.

For stomach acid:

\rm [H^{+}] = 10^{-1.0} = 0.1\; M.

Thus, the concentration of H⁺ in stomach acid is approximately ten times greater than that of lemon juice.

5 0
3 years ago
Read 2 more answers
When a solution forms, what interactions between particles are involved? Which are exothermic? Which are endothermic?
Blizzard [7]

Answer:

Explanation:

There are three types of interactions involved between the particles when solution are formed.

1 : Solute - solute interaction:

2 : Solute - solvent interaction:

3 : Solvent - solvent interaction:

1 : Solute - solute interaction:

It is the inter-molecular attraction between the solute particles.

2 : Solute - solvent interaction:

It involve the inter-molecular attraction between solvent and solute particles.

3 : Solvent - solvent interaction:

It involve the intermolecular attraction between solvent particles.

Solutions are formed if the intermolecular attraction between solute particles are similar to the attraction between solvent particles.

Exothermic process:

The process will exothermic when solute solvent bonds are formed with the release of energy and energy required to brake the solute-solute particles and solvent solvent particles are less.

Endothermic process:

The process will be endothermic when energy required to break the solute-solute particles and solvent solvent particles are higher than energy released when solute solvent bonds are formed .

6 0
3 years ago
The acid dissociation constant for an acid dissolved in water is equal to the ____.
Darya [45]
<span>equilibrium constant times the concentration of water. - 100% guaranteed correct</span>
5 0
4 years ago
Read 2 more answers
An acid with molar mass 84.48 g/mol is titrated with 0.650 M KOH. What volume of KOH solution is needed to titrate 1.70 grams of
RSB [31]

Answer:

V=0.0310L=3.10mL

Explanation:

Hello.

In this case, since the acid is monoprotic and the KOH has one hydroxyl ion only, we can see that at the equivalence point the moles of both of them are the same:

n_{acid}=n_{KOH}

Thus, since we are given 1.70 g of the acid, we compute the moles of acid that were titrated:

n_{acid}=1.70g*\frac{1mol}{84.48g}=0.0201mol

Which equal the moles of KOH. In such a way, since the molarity is defined as moles over liters (M=n/V), the liters are moles over molarity (V=n/M), thus, the resulting volume is:

V=\frac{0.0201mol}{0.650mol/L}\\\\V=0.0310L=3.10mL

Best regards!

7 0
3 years ago
Which number should go in the blank?<br> - H₂ + O2 -&gt; 2H₂O<br> O<br> 2<br> 3<br> 1
nydimaria [60]
2 is the number as you need to balance the equation
8 0
3 years ago
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