Some of the formulas below could be either molecular or empirical formulas; however, some could only be molecular formulas. Whic
2 answers:
Answer:
Explanation:
Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.
Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.
must be a molecular formula as empirical formula will be
must be a empirical formula.
must be a molecular formula as the empirical formula will be
can be a molecular formula or a empirical formula.
can be a molecular formula or a empirical formula.
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Answer:
The answer to the question is
50 % of the original amount of potassium 40 will be left after one half life or 1.25 billion years
Explanation:
To solve the question we note that the half life is the time for half of the quantity of substance that undergoes radioactive decay to disintegrate, thus
we have
half life of potassium 40 K₄₀ = 1.25 billion years
To support the believe tht the rock was formed 1.25 billion years ago we have
After 1.25 billion years we have
=
=0.5 of
will be left or 50 % of the original amount of potassium 40 will be left