1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
____ [38]
3 years ago
7

If you need to produce 9.75 moles of iron(III) oxide (Fe2O3), how many moles of iron will be required? *

Chemistry
1 answer:
torisob [31]3 years ago
7 0

Answer: Thus 9.75 moles of iron will be required.

Explanation:

The balanced chemical reaction is:

2Fe+3O_2\rightarrow 2Fe_2O_3  

According to stoichiometry :

2 moles of Fe_2O_3 are produced by= 2 moles of Fe

Thus 9.75 moles of Fe_2O_3 are produced by=\frac{2}{2}\times 9.75=9.75moles  of Fe

Thus 9.75 moles of iron will be required.

You might be interested in
Will the water level of the sea increase when there is global warming
alexdok [17]
Global warming will cause see levels to rise since a lot of water is stored in ice sheets which will melt.  All of the melt water will end up in the ocean causing sea levels to rise.

I hope this helps.  Let me know if anything is unclear.
8 0
3 years ago
The solubility of oxygen gas in water at 40 ∘c is 1.0 mmol/l of solution. What is this concentration in units of mole fraction?
juin [17]

The formula for mole fraction is:

mole fraction of solute = \frac{number of moles of solute}{total number of moles of solution}    -(1)

The solubility of oxygen gas = 1.0 mmol/L  (given)

1.0 mmol/L means 1.0 mmol are present in 1 L.

Converting mmol to mol:

1.00 mmol\times \frac{1 mol}{1000 mmol} = 0.001 mol

So, moles of oxygen = 0.001 mol

For moles of water:

1 L of water = 1000 mL of water

Since, the density of water is 1.0 g/mL.

Density = \frac{mass}{volume}

Mass = 1.0 g/ml\times 1000 mL = 1000 g

So, the mass of water is 1000 g.

Molar mass of water = 18 g/mol.

Number of moles of water = \frac{1000 g}{18 g/mol} = 55.55 mol

Substituting the values in formula (1):

mole fraction = \frac{0.001}{55.55+0.001}

mole fraction = 1.8\times 10^{-5}

Hence, the mole fraction is 1.8\times 10^{-5}.

7 0
3 years ago
What will increased temperature in a reaction cause
uranmaximum [27]
I think your answer is 2 because the temperature will rise so the particles will move faster
7 0
3 years ago
05. When a gold pebble is placed in a graduated cylinder that contains 12.0 mL of water, the water level rises
OLga [1]

Answer:

142.82 g

Explanation:

The following data were obtained from the question:

Volume of water = 12 mL

Volume of water + gold = 19.4 mL

Density of gol= 19.3 g/cm³

Mass of gold =.?

Next, we shall determine the volume of the gold. This can be obtained as follow:

Volume of water = 12 mL

Volume of water + gold = 19.4 mL

Volume of gold =.?

Volume of gold = (Volume of water + gold) – (Volume of water)

Volume of gold = 19.4 – 12

Volume of gold = 7.4 mL

Finally, we shall determine the mass of the gold as follow:

Note: 1 mL is equivalent to 1 cm³

Volume of gold = 7.4 mL

Density of gol= 19.3 g/cm³ = 19.3 g/mL

Mass of gold =?

Density = mass /volume

19.3 = mass of gold /7.4

Cross multiply

Mass of gold = 19.3 × 7.4

Mass of gold = 142.82 g

Therefore, the mass of the gold pebble is 142.82 g

6 0
3 years ago
Can you help me on all of these question? (mostly on question number 4)
abruzzese [7]
On four, in real life, she could put it in a strainer and put a bowl below the strainer. The liquid will fall through and into the bowl, but the solids will stay in the strainer. That may not be correct in terms of your reading because I don't know what the reading is.
3 0
3 years ago
Read 2 more answers
Other questions:
  • A chemist wants to uncover evidence that when molecules of a gas strike the wall of a container, energy is transferred from the
    13·1 answer
  • Calculate the number of kilojoules to warm 125 g of iron from 23.5 °C to 78.0 °C.
    7·1 answer
  • Helium decays to form lithium. 6 2 He → 6 3 Li + 0 -1 e This type of nuclear decay is called
    12·2 answers
  • What is the formula for copper(ii) phosphate? capitalization and punctuation count!?
    12·1 answer
  • Question 1
    10·1 answer
  • Witch equations are correctly balanced.
    14·1 answer
  • Ricardo finds an online site about the gas laws. The site shows the equation below for Charles’s law.
    10·2 answers
  • Which of these is an indication that a chemical reaction has occurred? (boiling of a substance ,freezing of a substance, formati
    15·2 answers
  • Según la ecuación, HNO3 + H2S ----------- NO + S+ H2O el elemento que se oxida es
    6·1 answer
  • Predict the products when aqueous solutions of sodium carbonate and calcium chloride are combined.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!