Answer:
The correct answer should be 12.72 pH of the mixed solution and 9.94g mass of solid BASO4 formed.
Explanation:
The molecules of Ba(OH)2 are : 1.00M x 0.05L = 0.05 ( moles )
The molecules of H2SO4 are : 0.494M x 0.0864L = 0.0426816
Ba(OH)2 + H2SO4 ----> BaSO4 + 2 H2O
0.0426816<--- 0.0426816
The mixed solution is Ba(OH)2 with 0.05 - 0.0426816 = 0.0073184
The concentration of mixed solution is : 0.0073184 : ( 0.05 + 0.0864 ) = 0.054 M
The pH of mixed solution is 14 - -log[0.054] = 14 - 1.27 = 12.73 PH
And the mass of BaSO4 is 0.0426816 x ( 137 + 32 + 16 x 4 ) = 9.94 gams.
<u>125</u> is the total number of neutrons in an atom of 207/82 Pb
207 - 82 = 125
207 represents the mass number of the atom while 87 represent the atomic number. The mass number is usually the sum of the protons and neutrons in the nucleus.
Explanation:
Atoms of elements are usually classified by their proton number. A change in the proton number changes the element. However, the neutron number of an element can differ within a small range giving various isotopes of the element. Some will be stable others will be less stable. The less stable are less common to occur naturally because they decay.
Usually, for smaller atoms, the number of neutrons is more or less similar to the number of protons. However, with larger atoms, there are more neutrons than protons.
Learn More:
For more on atomic and mass numbers check out;
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Answer:
This is the best answer your mom
Explanation:
Hydrogen fuel cells burn with Oxygen and produces Water.
It is commonly used to produce electricity.
There are two electrons in the outermost shell of calcium
