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solniwko [45]
3 years ago
8

Explain why desert soils tend to be rich in minerals but poor in topsoil

Chemistry
1 answer:
wlad13 [49]3 years ago
7 0
Desert soil has poor topsoil and hardly any organic material in it.

This is because regularly watered soil provides the perfect environment for certain bacteria, bugs and other organisms to grow which in turn provide quality topsoil.

In a desert with very little rain, the perfect environment is never produced, which results in a lot of minerals but poor topsoil for any quality agriculture to take place.
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A sample of g of pure aluminum metal is added to mL of M hydrochloric acid. The volume of hydrogen gas produced at standard temp
MArishka [77]

Answer:

V = 11.2L are produced

Explanation:

... <em>Sample of 27g of pure aluminium, 3added to 333 mL of 3.0 M HCl..</em>

Based on the chemical reaction:

2Al(s) + 6HCl(aq) → 2AlC₃(aq) + 3H₂(g)

<em>Where 3 moles of hydrogen are produced when 6 moles of hydrochloric acid reacts with 2 moles of Al.</em>

<em />

To solve this question, we need to determine limiting reactant converting each reactant to moles. With limiting reactant and the chemical reaction we can find moles of hydrogen and its volume at STP (T=273.15K; P=1atm), thus:

<em>Moles Al-Molar mass: 26.98g/mol-:</em>

27g * (1mol / 26.98g) = 1mol of Al

<em>Moles HCl:</em>

333mL = 0.333L * (3mol/L) = 1mol HCl

For a complete reaction of 1 mole of HCl are required:

1mol HCl * (2mol Al / 6mol HCl) = 0.333 moles of Al. As there is 1 mole of Al, Al is in excess and <em>HCl is limiting reactant.</em>

<em />

Moles of Hydrogen produced are:

1mol HCl * (3 moles H₂ / 6 mol HCl) = 0.5moles H₂ are produced.

Using ideal gas law:

PV = nRT

V = nRT/P

<em>Where V is volume</em>

<em>n are moles: 0.5mol</em>

<em>R is gas constant: 0.082atmL/molK</em>

<em>T is absolute temperature: 273.15K</em>

<em>P is pressure: 1atm.</em>

<em />

Solving for V:

V = 0.5mol*0.082atmL/molK*273.15K / 1atm

<h3>V = 11.2L are produced</h3>
3 0
3 years ago
Please answer step by step.
Digiron [165]

3 moles of NaOH reacts with 1 mole of phosphoric acid.

<h3>What is the moles ratio of the NaOH and Phosphoric acid reaction?</h3>

The moles ratio of the reaction between NaOH and Phosphoric acid is given by the equation of the reaction below:

3\:NaOH + H_{3}PO_{4} \rightarrow Na_{3}PO_{4} + 3\:H_{2}O \\

Based on the equation of the reaction, 3 moles of NaOH reacts with 1 mole of phosphoric acid.

Learn more about mole ratio at: brainly.com/question/19099163

#SPJ1

3 0
2 years ago
8. Explain the process of convection at the molecular level.​
Ilya [14]

Answer:

Convection is a type of heat transfer that only happens in liquids and gasses. Convection happens when there is a difference in temperature between two parts of a liquid or gas.

Explanation:

8 0
3 years ago
100 PTS IM DESPERATE NEED BY TOMMOROW
faust18 [17]

Answer:

rest will do later mom is calling me plz understand promise will do it

Explanation:

  • Elements and compounds are similar in that they are both made of atoms and in some cases molecules.
  • Methods of Breaking Down Compounds
  • The only way to break down a compound is through a chemical change. Sometimes, energy is needed for a chemical change to happen. Two ways to add energy to break down a compound are to apply heat and to apply an electric current.
4 0
2 years ago
Which period number is aluminum? And which group number is aluminum in?
erastovalidia [21]
13 is the number for it on the periodic table  and Group 3 is the correct answer hope this helps.
7 0
3 years ago
Read 2 more answers
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