Answer:
The molality of solution=12.605 m
Explanation:
We are given that
Molar mass of Hydrogen peroxide, M=34 g/mol
Density of solution,
30% Means mass of solute (Hydrogen peroxide)=30 g
Mass of solvent =100-30=70 g
Total mass of solution, m=100 g
Number of moles of solute=
Using the formula
Number of moles of hydrogen peroxide=
Now, molality of solution
Hence, the molality of solution=12.605 m
Separation by density would be the best method to separate oil and vinegar.
Answer: The correct answer is true, atoms have the same amount of protons and electrons
Answer:
<h2>0.041 M</h2>
Explanation:
The molarity of a solution when given the number of moles the substance and it's volume can be found by using the formula
n is the number of moles
v is the volume in L
We have
We have the final answer as
<h3>0.041 M</h3>
Hope this helps you
Answer:
Explanation:
To answer this question successfully, we need to remember that atoms are neutral species, since the number of protons, the positively charged particles, is equal to the number of electrons, the negatively charged particles. That said, we may firstly find an atom which has 3 electrons (and, as a result, 3 protons, as it should be neutral).
The number of protons is equal to the atomic number of an element. We firstly may have an atom with 3 protons and 3 electrons (atomic number of 3, this is Li).
Similarly, we may take the atomic number of 4, beryllium, and remove 1 electron from it. Upon removing an electron, it would become beryllium cation, .
We may use the same logic going forward and taking the atomic number of 5. This is boron. In this case, we need to remove 2 electrons to have a total of 3 electrons. Removal of 2 electrons would yield a +2-charged cation: .