Answer:
Explanation:
To convert from moles to atoms, we must use Avogadro's Number.
This number tells us the number of particles (atoms, molecules, ions, etc.) in 1 mole. In this case, the particles are atoms of calcium (Ca).
1. Convert from moles to atoms.
Write Avogadro's number as a fraction.
Multiply the given number of moles of calcium (3.8) by the fraction created.
The moles of calcium will cancel.
The denominator of 1 is insignifcant and we can turn this into a simple multiplication problem.
2. Round
The problem tells us to round to 2 decimal places or the hundredth place.
The 8 in the thousandth place tells us to round the 8 to a 9.
There are about <u>2.29*10²⁴ atoms of calcium</u> in 3.8 moles.
Answer:
As number of particles increases, pressure increases.
Explanation:
More particles will made more pressure.
A base is a substance which dissolves in water produce Hydroxide ions (OH-) in solution.
Example:-
(aq) +
Most of the bases <em>do</em><em> </em><em>not</em> dissolve in water but some bases dissolve in water. Those which dissolve in water without any chemical reaction are called, Alkalines.
Note: Not all bases are alkaline, which only dissolves in water are called alkaline.
Decide what she should add to the soil to neutralise the pH.
Since, the soil became too alkaline for which the plant is unable to grow properly. To neutralise this, she should add a little amount of Sulfur (acidic) to it. So that the pH will be neutralised.
The way that they show landmasses? not sure
All of them is a type of a metamorphic rock. I searched it up and it showed all of the answers so tell your teacher all of them is a type of metamorphic rock.