Explanation:
the experiment conducted is the student adds sugar to a cup of iced tea and a cup of hot tea. She notices that the time needed for the sugar to dissolve in each cup is different. She thinks this has something to do with the temperature of the tea
hypothesis: If the student puts the sugar in both glasses of tea, then the sugar in the hot tea should dissolve quicker.
A solid, but they are constantly vibrating
Avg. atomic mass=<span>∑i</span><span>(<span>isotopei</span>×<span>abundancei</span><span>)</span></span>
Answer:
D: 0.6 moles
Explanation:
First we balance the equation:
- Zn + AgNO₃ → Zn(NO₃)₂ + Ag
There are two NO₃ species on the right side, so we put a two before AgNO₃:
- Zn + 2AgNO₃ → Zn(NO₃)₂ + Ag
Now we put a two before Ag on the right, to balance the Ag atoms:
- Zn + 2AgNO₃ → Zn(NO₃)₂ + 2Ag
The equation is now balanced.
Now we<u> convert 3.6x10²³ atoms of zinc to moles</u>, using<em> Avogadro's number</em>:
- 3.6x10²³ atoms ÷ 6.023x10²³ atoms/mol = 0.6 moles
Then we<u> convert 0.6 moles of zinc into moles of silver</u>, using the <em>stoichiometric coefficients of the balanced equation</em>:
- 0.6 mol Zn *
= 0.6 mol Ag
Thus the answer is option D.