Answer: The mass of rust that can be removed is 1.597 grams
To calculate the number of moles for given molarity, we use the equation:
Molarity of oxalic acid solution = 0.1255 M
Volume of solution = = 600 mL = 0.600 L (Conversion factor: 1 L = 1000 mL)
Putting values in equation 1, we get:
For the given chemical reaction:
By Stoichiometry of the reaction:
6 moles of oxalic acid reacts with 1 mole of ferric oxide (rust)
So, 0.06 moles of oxalic acid will react with = of ferric oxide (rust)
To calculate the mass of rust for given number of moles, we use the equation:
Molar mass of rust (ferric oxide) = 159.7 g/mol
Moles of rust = 0.01 moles
Putting values in above equation, we get:
Hence, the mass of rust that can be removed is 1.597 grams
How do the internal structures of vascular and plants transport food and water.
How many grams of oxygen gas are contained in a 15 L sample at 1.02 atm and 28oC?
We can use the Ideal Gas Law to solve this problem
pV = nRT
p = 1.02 atm
V = 15 L
T = 28 °C
(a) Convert temperature to kelvins
T = (28 + 273.15) K = 301.15 K
(b) Calculate the number of moles
(c) Calculate the mass
Two atoms that are isotopes of one another must have different number of what? A: Protons
D: All Particles
Just to add its shortly i chose b and got it correct
Which statement is true for a cooling curve? A. It shows how the temperature of the substance falls as heat is removed. B. It shows how the temperature of the substance changes when heat is applied. C. It shows the increase in the average kinetic energy of the particles. D. It shows how heat absorption affects the motion of particles. E. It shows how energy gain causes the temperature to fall.
It shows how the temperature of the substance falls as heat is removed.
The two typical phase diagram curves are heating curve and cooling curve.
The heating curve shows the dependence of temperature on time when constant heat is applied to the material. Since heat is applied, the temperature rises and we see a typical curve showing an increase in temperature of a solid phase followed by a horizontal line depicting the phase change from solid to liquid, then the same scenario for liquid and gas.
Similarly, cooling curve shows the opposite process: instead of heating the substance, we're now removing heat at a constant rate and the temperature is decreasing now.
That said, it shows how the temperature of the substance falls as heat is removed.