A scientist experiments ima unknown solution. She notices that when a base, sodium hydroxide, is added to the solution, it forms
2 answers:
Answer:
(B) the unknown solution is acidic.
Explanation:
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In this case, as the unknown solution reacts with sodium hydroxide forming a salt water, one infers that the unknown solution is acidic since all the acids which react with bases form salts and water based on the shown below widespread chemical reaction:
Which is a neutralization chemical reaction. It is clear that acidic solutions have pH lower than 7 but it is not enough to substantiate the unknown solution formed the salt after the addition of the base. However, the acid could have oxygen but it is not enough to justify the formation of a salt. Finally, it is impossible for the unknown solution to have hydroxide ions since a neutralization was carried out.
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1.34 moles are in 135g of Teflon.
Explanation:
Molecular formula of teflon is (C2H4)n
mass of teflon = 135 grams
atomic mass of teflon = 100.01 gram/mole
number of moles of teflon = ?
Formula used to calculate number of moles in a substance is given as:
number of moles =
putting the values in the above equation:
number of moles =
number of moles = 1.34 moles
Teflon is polymer which is used for making non-stick coating, in 135 grams of teflon there are 1.34 moles in it.