CHEMISTRY COLLEGE

Oxalic acid can remove rust (Fe2O3) caused by bathtub rings according to the reaction Fe2O3(s) - 6H2C2O4(aq) rightarrow 2Fe(C2O4)33-(aq) - 3H2O(l) - 6H+(aq) C calculate the number of grams of rust that can be removed by 6.00 times 102 mL of a 0.100 M solution of oxalic acid.

Answers

Answer 1
Answer:

Answer: The mass of rust that can be removed is 1.597 grams

Explanation:

To calculate the number of moles for given molarity, we use the equation:

    .....(1)

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


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How do the internal structures of vascular and plants transport food and water.

Answers

All vascular plants have vascular tissue which allows the transport of water, nutrients and food between the ground and the body of the plant. So your answer would be that the internal structures of vascular plants transport food and water through their vascular tissue. Hope this helps!
The Xylem transport water and minerals from the roots to the rest of the plant. While the Phloem transport food from the leaves to the rest of the plant. They both work with the internal structures of vascular and nonvascular plants transport food and water threw out the plant.
MIDDLE SCHOOL

How many grams of oxygen gas are contained in a 15 L sample at 1.02 atm and 28oC?

Answers

Answer:

Explanation:

We can use the Ideal Gas Law to solve this problem

pV = nRT

Data:

p = 1.02 atm

V = 15 L

T = 28 °C

Calculations:

(a) Convert temperature to kelvins

T = (28 + 273.15) K =  301.15 K

(b) Calculate the number of moles

(c) Calculate the mass

COLLEGE

Two atoms that are isotopes of one another must have different number of what? A: Protons

B: Neutrons

C: Electrons

D: All Particles

Answers

For many of the chemical elements there are several known isotopes. Isotopes are atoms with different atomic masses which have the same atomic number. The atoms of different isotopes are atoms of the same chemical element; they differ in the number of neutrons in the nucleus.

Answer:

Just to add its shortly i chose b and got it correct

Explanation:

MIDDLE SCHOOL

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.

Answers

Answer:

It shows how the temperature of the substance falls as heat is removed.

Explanation:

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.

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