All categories

3 years ago

Consider the reaction between iron (III) oxide, Fe2O3 and carbon monoxide, CO.

1 answer:

3 0

Fe2O3 + 3CO --> 2Fe + 3CO2

m(Fe2O3)=213 g
m(CO)=140 g
_______________

n(Fe2O3)=?
m(Fe)=?
n(Fe2O3)=?
n(CO)=?
n(CO2)=?

n(Fe2O3)=m(Fe2O3) / M(Fe2O3)
n(Fe2O3)= 213 g / 159,7 gmol-1 = 1,33 mol

n(CO)= m(CO) / M(CO) n(CO)= 140 g / 28,01 gmol-1 = 4,99 mol

You might be interested in

What does the Aufbau principle state?

givi [52]

The correct answer as to what the Aufbau principle states is B. electrons will be added to an atom starting from the lowest possible level or sublevel. First, these lowest levels have to be fulfilled before going into the higher levels of energy, in order to make the matter balanced and in harmony, until the perfect electron configuration is achieved - the one which is stable. The word Aufbau is a German word that means "building-up."

4 0

3 years ago

Attempt 1

Vsevolod [243]

Answer:

12.01

Explanation:

(12.00*98.93% + 13*1.07%) /100% = 12.01

3 0

3 years ago

What are three chemical changes and what are three physical changes?

choli [55]

Chemical changes:

burning wood

digesting food

mixing acid and base

Physical changes:

breaking a bottle

melting an ice cube

crumbling a sheet of paper

8 0

3 years ago

Calculate the ph of the solution resulting by mixing 20.0 ml of 0.15 m hcl with 20.0 ml of 0.10 m koh

Aliun [14]

Answer:

1.60.

Explanation:

The no. of millimoles of HCl = MV = (0.15 M)(20.0 mL) = 3.0 mmol.

The no. of millimoles of KOH = MV = (0.10 M)(20.0 mL) = 2.0 mmol.

Since the no. of millimoles of HCl is larger than that of KOH. The solution is acidic.

∴ M of remaining HCl [H⁺] remaining = (NV)HCl - (NV)KOH/V total = (3.0 mmol) - (2.0 mmol) / (40.0 mL) = 0.025 M.

∵ pH = - log[H⁺]

∴ pH = - log[H⁺] = - log(0.025) = 1.602 ≅ 1.60.

5 0

4 years ago

List the 9 foods that weaken your immune system and explain why. NO LINKS

aniked [119]

Answer:

salty foods

Explanation:

Salty foods like chips, frozen dinners, and fast food may impair your body's immune response, as high salt diets may trigger tissue inflammation and increase the risk of autoimmune diseases.

3 0

2 years ago