Answer:
[H3O+] = 10-pH or [H3O+] = antilog (- pH) Example: What is the hydronium ion concentration in a solution that has a pH of 8.44? On a calculator, calculate 10-8.44, or "inverse" log ( - 8.44).
Explanation:
Element C will have 5 protons
The answer is the magnetosphere
In the technique of recrystallization "the mother liquor is the filtrate".
<u>Option: </u>C
<u>Explanation:</u>
The portion of a solution remaining over after crystallization is understood as a mother liquor. It is found in chemical reactions that include sugar refining. It is the liquid produced by filtration of the crystals. The residual liquid, once the crystals have been extracted out as the mother liquor will include a portion of the initial solution as estimated at that temperature by its solubility as well as any unfiltered contaminants. Second and third crystal crops can then be collected from the mother's liquor.
Answer:
The most important thing to know is that an α-particle (alpha particle) is a helium nucleus.
Explanation:
It contains 2 protons and 2 neutrons, for a mass number of 4.
During α-decay, an atomic nucleus emits an alpha particle. It transforms (or decays) into an atom with an atomic number 2 less and a mass number 4 less.
Thus, radium-226 decays through α-particle emission to form radon-222 according to the equation:
226
88
Ra
→
222
86
Rn
+
4
2
He
Note that the sum of the subscripts (atomic numbers or charges) is the same on each side of the equation. Also, the sum of the superscripts (masses) is the same on each side of the equation.
EXAMPLE
Write a balanced nuclear equation for the α decay of polonium-208.
Solution
The unbalanced equation is
208
84
Po
→
4
2
He
+
X
The superscript of
X
must be 208 – 4 = 204.
The subscript of
X
must be 84 – 2 = 82.
Element 82 is Pb. So the equation is
208
84
Po
→
4
2
He
+
204
82
Pb
Explanation:hope this is right and helps