<em>the element which is used for protection from radioactive substances is <u>lead ..
</u>its symbol is Pb..
<u>atomic number of lead is 82..
melting point is 327.5 degree C
boiling point is 1750 degree C..</u></em>
B. 19.3 g/cm would be the answer
PH scale is used to determine how acidic , basic or neutral a solution is. It can be calculated using the following equation
pH = -log [H₃O⁺]
hydronium ion concentration has already been given
[H₃O⁺] = 4.91 x 10⁻⁴ M
pH = -log[4.91 x 10⁻⁴ M]
pH = 3.3
the pH of medium is 3.3
Hello!
The volume of the gas when its pressure is increased to 880 mm Hg is
88,64 mLThis question can be easily answered using the
Boyle's Law, which states that as pressure increases, the volume is lower. It can be expressed in a mathematical way as follows:
So, from this equation we can clear V₂ to find the volume at 880 mm Hg:
Have a nice day!