Answer:
Density if iron shot = 7.92 g/ml (2 sig. figs.)
Explanation:
By definition, density is mass per unit volume. That is,
Density (D) = mass(m)/Volume(V)
mass(m) = 28.5g (given)
Volume(V, of iron shot) = 49.10ml - 45.5ml = 3.6ml
Substitutuing into D = m/V = 28.5g/3.6ml = 7.9166667 g/ml (calc.ans)
≅ 7.92 g/ml (2 sig. figs.)
Hope this helps. :-)
Answer:
A. Na(s) is reduced
Explanation:
In order for reduction to occur, the atom must gain an electron. And in this reaction, the Na(s) went from a 0 to +1
**Remember: Lose Electrons = Oxidized and Gain Electrons = Reduced
C) powdered sugar in hot water because the sugar is already broken so it would be more faster than sugar cube in hot water
Answer: An existing theory is modified so that it can explain both the old and new observations.
Explanation:
An Ionic bond is the result of transfer of electrons between atoms