A sample of a substance is found to have a mass of 223.5 grams. A graduated cylinder contains 45.6 ml of water. After a metal cy
1 answer:
Answer:
We have the final answer as
<h2>9.85 g/mL</h2>Explanation:
The density of a substance can be found by using the formula
From the question
mass of substance = 223.5 g
volume = final volume of water - initial volume of water
volume = 68.3 - 45.6 = 22.7
volume = 22.7 mL
It's density is
We have the final answer as
<h3>9.85 g/mL</h3>Hope this helps you
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Answer:- molecules.
Solution:- The grams of tetrabromomethane are given and it asks to calculate the number of molecules.
It is a two step unit conversion problem. In the first step, grams are converted to moles on dividing the grams by molar mass.
In second step, the moles are converted to molecules on multiplying by Avogadro number.
Molar mass of = 12+4(79.9) = 331.6 g per mol
let's make the set up using dimensional analysis:
= molecules
So, there will be molecules in 250 grams of
.