a. pH=5, pOH=9
b. pH=6.4771, pOH=7.5229
c. pH=1.6021, pOH=12.3979
d. pH=11.8751, pOH=2.1249
e. pH=13.9208, pOH=0.0792
Answer:
Explanation:
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In this case, since the density is computed via the division of the mass by the volume:
For the given mass of 54 g and volume of 6 mL, the density turns out:
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Plutonium-239 is used in nuclear bombs, here 239 is its mass number. For an atom, mass number is equal to sum of number of protons and neutrons.
Thus,
A=n+p=239...... (1)
From periodic table, the atomic number of plutonium is 94 which is equal to number of electron and proton in an atom.
Thus,
Z=p=94
Putting the value of p in equation (1)
n=239-94=145
The symbol is as follows:
Here, Z is atomic number, A is mass number and X is atom symbol thus, symbol for plutonium will be:
Therefore, number of protons, neutrons and symbol is 94, 145 and respectively.
Answer:
The Bismuth atom
Explanation:
it contains 83 atoms, 5 of which are valence electrons. These 5 electrons are accommodated in the 6s and 6p orbital.
Wireless devices, wi-fi routers, granite countertops, microwaves, cigarettes (if you smoke in your house), older box-shaped tv’s, antiques (furniture, jewelry, silverware), smoke detectors ( some use small amounts of radioactive isotope, americium-241 to alert you when there’s smoke in the air, light bulbs, computer screens, electric blankets, garage door openers. Hope it helps.