Answer:
Explanation:
There's a great many assumptions in this question. We have to assume that the rod was completely immersed. We also have to note that we can read the volumes to 3 places accurately. School graduated cylinders are not that accurate.
Leaving those objections aside, here is how the question should be done.
Final volume = 15.0 mL
Initial volume = 10.0 mL
Water displaced = 5.0 mL
The amount of water displaced is the same as the volume of the metal rod.
Finally the mass of the rod is 12.0 grams.
Density = mass / volume
Density = 12.0 grams / 5.0 mL
density= 2.4 grams / mL a mL and a cc^3 are the same thing.
density = 2.4 grams / cc^3
<u>Answer:</u>
Shifts the equilibrium to side that has fewest moles of gas.
<u>Explanation</u>:
"Le Chatelier's principle", also called as the equilibrium law in chemistry explains the effect in different states on some chemical equilibria. It states that when a system is in equilibrium for a long time, it is subject to change in pressure, volume, temperature or condensation.
In this case, with an "increase" in pressure, there would be a shift to the side of fewer moles of gas. Mainly the change towards the reactants.
Answer:
9.72 grams of Br
Explanation:
This is the salt: MgBr₂ (Magnesium bromide)
1 mol of MgBr₂ has 1 mol of Mg and 2 mol of Br
Molar mass MgBr₂ → 184.11 g/m
So the rule of three will be:
184.11 g of salt have 2 moles of Br
11.2 g of salt have (11.2 . 2)/184.11 = 0.122 moles of Br.
Molar mass Br = 79.9 g/m
Mol . molar mass = mass → 0.122 m . 79.9 g/m = 9.72 g
