Explanation:
Isopropyl alcohol is the solvent used in whiteboard markers. When it comes into contact with the permanent marker, the solvent breaks the cohesive force between the ink molecules and the whiteboard by solubilising them (i.e. returning them to solution).
Answer:
A hypothesis or a model is called falsifiable if it is possible to conceive of an experimental observation that disproves the idea in question.
B.
(2.43*10^24)*1/(6.022*10^23)
Answer:
4, 3, 2
Explanation:
so I would balance this equation first by identifying the 3 2 inbalance
usually with these you find a common factor that suits other variables
eg. 6 so times the right side by 2 and the O2 by 3
now O are equal on both sides and to equalise fe times the left by 4
the equation is balanced
Answer:
79.8g/dm³
Explanation:
As you can see, the solution in the problem contains 0.5 moles of copper sulfate per dm³. To solve this question we must convert these moles to grams using its molar mass (Molar mass CuSO4 = 159.609g/mol) as follows:
0.5mol CuSO4/dm³ * (159.609g/mol) =
<h3>79.8g/dm³</h3>