When dealing with a half life question, you should use the half life formula which is: y = a(b)^t/h
Answer:
Mass of hydrogen = 667 kg (Approx)
Explanation:
Given:
Mass of water = 593 kg
Yield rate = 88.9%
Find:
Mass of hydrogen
Computation:
Mass of hydrogen = [Mass of water / Yield rate]100
Mass of hydrogen = [593 / 88.9]100
Mass of hydrogen = 667.04162
Mass of hydrogen = 667 kg (Approx)
<u>Answer:</u> The volume of stock solution needed is 0.016 L
<u>Explanation:</u>
To calculate the volume of stock solution, we use the equation:
where,
are the molarity and volume of the stock solution
are the molarity and volume of diluted solution
We are given:
Putting values in above equation, we get:
Hence, the volume of stock solution needed is 0.016 L
Answer:
Explanation:
An element is a _distinct____ substance represented by a __chemical____ symbol. Chemical symbols have _one__ or _two__ letters. The first letter of a chemical symbol is always a _Capital_____ letter and the second letter is always a _small_____ letter.
Elements are distint substances that cannot be split up into simpler substances. Such substances are made up of one kind of atom. Each of them is usually symbolised by a capital letter or a capital letter followed by a small letter derieved from the English or latin or greek name of the element.
