We have this
<span>C M = n / V => n = C M . V = 0,25 . 0,4 = 0,1 mole </span>
<span>m Na2CO3 = n . M = 0,1 . 106 = 10,6 g</span>
Answer:
D
Explanation:
Both images have 4 protons (positive particles) and 4 electrons (negative particles) so in total they don't have a charge. (<em>you don't have to worry about neutrons in this case, because they don't have a charge.)</em>
An ion has a charge so neither image is an ion
Lenght meter
mass kilogram
temperature kelvin
substance amount mole
time second
electric current ampere
light intensity candela
These artificial homes preserve the resources in the animal's environment and increases population size.
<h3>What is Population size?</h3>
This is defined as the number of organisms in a population at a given place and time.
Since the resources used are artificial, they are preserved with an increase in the population due to reproduction.
Read more about Population size here brainly.com/question/1502078
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1. Answer:
1.0 × 10–9 M OH–
Explanation:
pH = -Log[H+]
pOH = -Log[OH-]
But;
pH + pOH = 14
Therefore;
[H+] + [OH-] = 1.0 × 10^-14 M
Therefore;
[OH-] = 1.0 × 10^-14 M - (1.0 × 10^–5 M)
= 1.0 × 10^-9 M OH–
2. Answer;
pH = 7.28
Explanation;
pH = -Log[H3O+]
Given;
[H3O+] = 5.2 × 10^–8 M
Therefore;
pH = - log [5.2 × 10^–8 M]
= 7.28
The pH is 7.28
