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3 years ago

What is the concentration of Htions at a pH = 11?

1 answer:

5 0

Answer:
a) 1 x 10^-11 mol/L
b) 1 x 10^-6 mol/L
c) 1 x 10^-5 fewer H+ ions

Explanation

pH stands for Power of Hydrogen, the more acidic a substance is, the more H+ ions it has rendering the substance acidic. a pH of 1 means the concentration of H+ ions is 1 x 10^-1. A pH of 7 means the concentration of H+ ions is 1 x 10^-7 and so on.

10^-11 has 10^-5 more H+ ions than 10^-6

Hope this helps :)

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Determine the average atomic mass for nitrogen given the following percentages:

viva [34]

Answer:

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2 years ago

Which type of chemical bonding involves a transfer of electrons?

BigorU [14]

Answer:

ionic bond

Explanation:

7 0

2 years ago

Read 2 more answers

Most metals are very reactive, as are the elements in the halogen group. Aluminum, for instance, For example, reacts with elemen

steposvetlana [31]

Answer: B. you will need 53.2 g Cl2 for complete reaction and will produce 66.7 g of AlCl3.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles of aluminium}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{13.5g}{27g/mol}=0.5moles$

The balanced reaction is:

$2Al+3Cl_2(g)\rightarrow 2AlCl_3$

2 moles of aluminium react with= 3 moles of chlorine

Thus 0.5 moles of aluminium react with= $\frac{3}{2}\times 0.5=0.75$ moles of chlorine

Mass of chlorine= $moles\times {\text{Molar Mass}}=0.75\times 71=53.2g$

2 moles of aluminium produce = 2 moles of aluminium chloride

Thus 0.5 moles of aluminium react with= $\frac{2}{2}\times 0.5=0.5$ moles of aluminium chloride

Mass of aluminium chloride= $moles\times {\text{Molar Mass}}=0.5\times 133.34=66.7g$

Thus 53.2 g of chlorine is used and 66.7 g of aluminium chloride is produced.

5 0

3 years ago

If fluorine is stronger than carbon, what charge will the fluorine receive?

azamat

If fluorine is stronger than carbon, fluorine will receive a negative charge.

<h3>WHAT IS THE ELECTRONEGATIVITY SERIES?</h3>

The electronegativity series is the order in which elements of the periodic table are ranked in terms of their negative charges.

Elements with higher electron affinity are positioned higher in the series. According to this question, fluorine is stronger than carbon.

This means that fluorine will receive a negative charge (-) to become more electronegative.

Learn more about electronegativity series at: brainly.com/question/2060520

7 0

2 years ago

If 43.7 g of iron is completely used to produce 62.5 g of iron (III) oxide, how many grams of oxygen are involved in the reactio

Kobotan [32]

Mass of Oxygen : 18.8 g

<h3>Further explanation</h3>

Reaction(balanced) :

4Fe + 3O₂ → 2Fe₂O₃

mass Fe = 43.7 g

mol Fe(MW= 55,845 g/mol) :

$\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{43.7}{55.845}\\\\mol=0.783$

mol O₂ : mol Fe = 3 : 4, so mol O₂ :

$\tt \dfrac{3}{4}\times 0.783=0.5873$

Mass O₂(MW=32 g/mol) :

$\tt mass=mol\times MW\\\\mass=0.5873\times 32\\\\mass=18.7936~g\approx 18.8$

Or simply you can Conservation of mass, where the masses before and after the reaction are the same

<em>mass reactants=mass products</em>

mass iron+mass oxygen=mass iron (III) oxide

43.7 g + mass oxygen=62.5 g

mass oxygen = 62.5 - 43.7 = 18.8 g

5 0

3 years ago