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
LekaFEV [45]
3 years ago
9

How many grams of Fe2O3 are formed when 51.3 grams of iron, Fe, react completely with oxygen, O2?

Chemistry
1 answer:
lozanna [386]3 years ago
6 0

Answer: 73.4 g of Fe_2O_3 are formed when 51.3 grams of iron react completely with oxygen.

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} Fe=\frac{51.3g}{56g/mol}=0.92moles

The balanced chemical reaction is:

4Fe+3O_2\rightarrow 2Fe_2O_3

As Fe is the limiting reagent as it limits the formation of product.

According to stoichiometry :

4 moles of Fe produce = 2 moles of Fe_2O_3

Thus 0.92 moles of Fe will produce=\frac{2}{4}\times 0.92=0.46moles  of Fe_2O_3

Mass of Fe_2O_3=moles\times {\text {Molar mass}}=0.46moles\times 159.69g/mol=73.4g

Thus 73.4 g of Fe_2O_3 are formed when 51.3 grams of iron react completely with oxygen.

You might be interested in
If charge on only one object is tripled, determine the new force between them:
Allisa [31]

Answer:

+3·F

Explanation:

The number of objects in the given system = 2 objects

The charge on each object are; q₁ = -Q, q₂ = -Q

The force acting between the objects = +F

The distance between the objects = 2·d

The formula for the force acting between two charged particles is given as follows;

F=K \times \dfrac{q_{1} \times q_{2}}{r^{2}}

Therefore, we get;

F=K \times \dfrac{-Q \times -Q}{(2\cdot d)^{2}} = K \times \dfrac{Q^2}{4 \cdot d^2}

By tripling the charge, q₁, on the first object, we get;

q₂ = 3 × (-Q)

F_2=K \times \dfrac{-3 \cdot Q \times -Q}{(2\cdot d)^{2}} = K \times \dfrac{3 \cdot Q^2}{4 \cdot d^2} = 3 \times +F = +3\cdot F

Therefore, the new force between them, F₂ = +3·F

5 0
3 years ago
Which of the following temperature scales contains an absolute zero? Fahrenheit (°F) Celsius (°C) Kelvin (K)
melamori03 [73]
Kelvin (K) is the only scale that has a numeral value assigned to absolute zero. 
8 0
3 years ago
A 8.6 g sample of methane and 15.6 g sample of oxygen react according to the reaction in the video. identify the limiting reacta
GalinKa [24]
Answer:

<span>23.6 g carbon dioxide comes from 8.6 g of CH4 or 10.7 g carbon dioxide comes from 15.6 g O that means the 15.6 g of oxygen is still the limiting reactant because it gets used up and only makes 10.7 g of CO2. </span>

Explanation:

1) Balanced chemical equation:

CH₄ + 2O₂ → CO₂ + 2H₂O

2) mole ratios:
1 mol CH₄ : 2mol O₂ : 1 mol CO₂ : 2 mol H₂O

3) molar masses
CH₄: 16.04 g/mol
O₂: 32.0 g/mol
CO₂: 44.01 g/mol

4) Convert the reactant masses to number of moles, using the formula 

number of moles = mass in grams / molar mass


CH₄: 8.6g / 16.04 g/mol = 0.5362 moles
<span />

O₂: 15.6 g / 32.0 g/mol = 0.4875 moles

5) If the whole 0.5632 moles of CH₄ reacted that yields to the same number of moles of CO₂ and that is a mass of:
mass of CO₂ = number of moles x molar mass = 23.60 g of CO₂

Which is what the first part of the answer says.

6) If the whole 0.4875 moles of O₂ reacted that would yield 0.4875 / 2 = 0.24375 moles of CO₂, and that is a mass of:
mass of CO₂ = 0.4875 grams x 44.01 g/mol = 10.7 grams of CO₂.

Which is what the second part of the answer says.

7) From the mole ratio you know infere that 0.5362 moles of CH₄ needs more twice number of moles of O₂, that is 1.0724 moles of O₂, and since there are only 0.4875 moles of O₂, this is the limiting reactant.

Which is what the chosen answer says.

8) From the mole ratios 0.4875 moles of O₂ produce 0.4875 / 2 moles of CO₂, and that is:
0.4875 / 2 mols x 44.01 g/mol = 10.7 g of CO₂, which is the last part of the answer.

3 0
3 years ago
Modify the drawings of aspartic acid to show its structure at each ph. include hydrogen atoms.
Wittaler [7]
Aspartic acid<span> (abbreviated as </span>Asp<span> or </span>D<span>; encoded by the codons [GAU and GAC]), also known as </span>aspartate<span> in its deprotonated form, is an α-amino acid that is used in the biosynthesis of proteins.</span><span> Similar to all other amino acids it contains an amino group and a carboxylic acid. Its α-amino group is in the protonated −NH+3 form under physiological conditions, while its α-carboxylic acid group is deprotonated −COO</span>−<span> under physiological conditions. Aspartic acid has an acidic side chain (CH</span>2<span>COOH) which reacts with other amino acids, enzymes and proteins in the body.</span>
3 0
3 years ago
Which refers to substances that are complex molecules and contain carbon atoms bonded to hydrogen atoms?
victus00 [196]

Answer:

organic

Explanation:

Organic substances are those which contains covalently linked carbon to hydrogen (C-H) bonds in their structure. In other words, organic compounds or substances are uniquely composed of carbon and hydrogen atoms covalently linked together.

These substances usually contain a long chain of these bonds, hence, making them complex. Therefore, according to this question, substanves that are complex molecules and contain carbon atoms bonded to hydrogen atoms are referred to as ORGANIC SUBSTANCES.

5 0
3 years ago
Other questions:
  • What type of bond forms in iron (2) bromine
    6·1 answer
  • The emission spectrum of hydrogen shows discrete, bright, colored lines. Which characteristic of the Bohr model is best supporte
    13·2 answers
  • A gas sample enclosed in a rigid metal container at room temperature (20.0∘C∘C) has an absolute pressure p1p1p_1. The container
    13·1 answer
  • Which of the following statements is true based on the kinetic-molecular theory of matter?
    8·2 answers
  • The process that converts light energy from the sun to chemical energy stored in glucose is called
    14·1 answer
  • C2H6+O2→ CO2+ H2O I need help balancing this equation please someone help me please
    9·1 answer
  • HIFT|d/c/ 113 r 12
    6·1 answer
  • Crude oil is in soild form true or false
    15·2 answers
  • the Markovnikov product resulting from an addition reaction to a trisubstituted alkene is formed because _________.
    11·1 answer
  • A student measured out 0.333 moles of theobromine, CyH3N402 (MM = 180.8/mol) the
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!