Answer:
27.9 grams of Fe2O3
Explanation:
* = = 27.9 grams
Looking at the model given, I simply found the molar mass of Fe2O3 so I can set up an equation to find the number of grams. The molar mass of Fe2O3 is 159.69 grams. Since we are given that there are 0.175 moles of Fe2O3, then we can use that first in our equation. As you can see, I used the conversion factor <em>159.69 grams Fe2O3 = 1 mole Fe2O3. </em>By using this conversion factor, it was easy for me to set up an easy equation so I can find the number of grams of Fe2O3 when given 0.175 moles of Fe2O3.
After doing the math and following the rules of significant figures, you will end up with 27.9 grams Fe2O3 which is answer choice D
Glacial striations show the direction a glacier is moving, and it suggests that the glacier flowed from a single location.
Answer:
[KIO₃] = 0.548 M
Explanation:
Molarity is a sort of concentration which involves moles of solute in 1L of solution.
Volume of solution 5L
Mass of solution: 587 g
Let's convert the mass to moles (mass / molar mass)
587 g / 214 g/mol = 2.74 moles
Molarity is mol/L → 2.74 mol / 5L = 0.548 M
The hydrogen bonds is an intermolecular force.
This is, it is an atracction among molecules, which trends to keep the molecules close one to each other quite strongly.
Vaporization is the pass from liquid, where the molecules are pretty close one to each other, to gas, where the molecules are more distant from each other. To reach that separation of the molecules, the strong hydrogen bonds must be overcome, which means a higher energy requirement than in similar compounds without hydrogen bonds.
That is reflected in high values for the enthalpy of vaporization in the compounds with hydrogen bonds (like hydrogen halides).
So, that leads to the option D. of the list of answers. enthalpy heat of vaporization gives the best indication of the relative strenght of hydrogen bonds.