Answer:
1.12 x 10²³atoms of F
Explanation:
Number of MgF₂ atoms = 5.6 x 10²² molecules;
The unknown here is the number of Fluorine atoms found in the compound.
In MgF₂,
1 mole of MgF₂ contains 2 moles of F;
From the given number of molecules we can also say that, MgF₂ contains 5.6 x 10²²atoms;
1 mole of MgF₂ contains 2 moles of F;
5.6 x 10²²atoms of MgF₂ will contain 2 x 5.6 x 10²² = 1.12 x 10²³atoms of F
4.79 x 10⁻⁷moldm⁻³
Explanation:
Given parameters:
pOH of RbOH = 6.32
Unknown:
Molarity of the base = ?
Solution:
The pH or pOH scale is used for expressing the level of acidity alkalinity of aqueous solutions.
pOH = -log[OH⁻]
we know the pOH to be 6.32
6.32 = -log[OH⁻]
[OH⁻] = inverse log₁₀(6.32)
[OH⁻] = 4.79 x 10⁻⁷moldm⁻³
Learn more:
pH brainly.com/question/12985875
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There are 115 known elements as of today (Feb. 13, 2016)
so, 'C' is the correct answer
<h3>
Answer:</h3>
The rate of sea level change is the fastest
<h3>
Explanation:</h3>
To determine the process which is the fastest we need to determine the rate at which each occurs in meters per year.
Rate of sea level changes is 10 m per 1,000 years
Therefore, the rate of sea level change = 10 m ÷ 1000 years
= 0.01 m/yr
Regional erosion occurs at 2 m per 1,000 years
Therefore, Rate in meters per seconds = 2 m ÷ 1,000 years
= 0.002 m/year
Uplift occurs at a rate of 0.1 m per 1,000 years
Thus, rate in meters per seconds = 0.1 m ÷ 1,000 years
= 0.0001 m/yr
Therefore, the rate of sea level change is the fastest at a rate of 0.01 meter/year
Answer:
31 moles
Explanation:
The balanced combustion reaction of the wax, 
is shown below as:
As seen from the reaction,
1 mole of wax, on combustion produces 31 moles of carbon dioxide, 
<u>Hence, moles of when 1 mole of wax, is burnt = 31 moles</u>
