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
Fittoniya [83]
3 years ago
13

If 279 grams of iron react with an excess of oxygen, as shown in the balanced equation below, how many grams of iron (iii) oxide

can be formed? 4fe + 3o2 yields 2fe2o3 139.5 grams 199.5 grams 399 grams 1596 grams
Chemistry
1 answer:
dsp733 years ago
8 0

Answer:-

399 gram

Explanation:-

The balanced chemical equation for the reaction is

4Fe +3 O2 --> 2 Fe2O3

Atomic mass of Iron Fe is 55.845 gram

Molecular mass of Iron (III) Oxide Fe2O3 is

55.845 x 2 + 16 x 3 = 159.69 gram

From the balanced chemical equation,

4 Fe gives 2 Iron (III) oxide

∴ 4 x 55.845 grams of Fe gives 2 x 159.69 grams of Iron (III) Oxide.

279 grams of Fe gives (2 x 159.69) x 279 / ( 4 x 55.845)

= 399 gram

You might be interested in
2 icl + h2i2 + 2 hcl is first order in icl and second order in h2. Complete the rate law for this reaction in the box below. Use
OleMash [197]

2 ICl + H2   ----> I2 + 2 HCl

as given that rate is first order with respect to ICl and second order with respect to H2

The rate law will be

Rate = K [ICl] [ H2]^2

b) Given that K = 2.01 M^-2 s^-1

Concentrations are

[ICl] = 0.273 m and [H2] = 0.217 m

Therefore rate = 2.01 X (0.273)(0.217)^2 = 0.0258 M / s

5 0
2 years ago
What volume will 3.0 moles of O2 gas occupy at S.T.P?
REY [17]

Answer:

3 moles of oxygen at STP will occupy a volume of 3×22. 4=67. 2 L.

Explanation:

6 0
1 year ago
What is meant by the half-life of a radioactive substance
Shtirlitz [24]

Answer:

Explanation:

The half life of a radioactive atom is the time taken for half of the radioactive nuclei to disintegrate. The shorter the half life, the faster a radioactive nuclei decays.

Half life is often expressed as:

                               Half life = \frac{0.693}{λ}

Where λ is the decay constant.

3 0
2 years ago
A chemist must calculate the amount of an element needed for a chemical reaction. The reaction requires 3.4 moles of silver. Hel
zvonat [6]

Answer:

3.4 moles of silver * 107.868 grams of silver/1 mole of silver = 370 grams of silver.

Explanation:

According to the NYS Reference Table, one mole of silver equates to 107.868 grams. Therefore, if you want to convert from moles to grams, the mole unit should be on the bottom, since it is the unit being cancelled out. Above the mole unit should be the gram unit, since it is the unit you want to convert to. Once you do the math with significant figures, the solution turns out to be 370 grams of silver.

6 0
3 years ago
An atom in an excited state _____. A. has more energy than it does in the ground state B. has one more electron than it does in
aleksklad [387]

The answer should be A, has more energy than it does in the ground state. De-excitation is removing electrons, so excitation would be adding more in to make it more stable. The ground state is what is considerd stable.

ANSWER: A

7 0
2 years ago
Other questions:
  • How does the volume occupied by a cubic centimeter compare with the volume occupied by a millimeter
    14·1 answer
  • Which statement correctly describes the actual yield and the theoretical yield of a reaction?
    14·2 answers
  • Like stoichiometry involving mass quantities, stoichiometry involving solutions always includes _____________.
    11·1 answer
  • 1.34 milligrams is the same as _______kg and ______g
    14·2 answers
  • Which is not a waste product of cellular respiration heat oxygen carbon dioxide or water?
    6·1 answer
  • Какая масса хлора и какое количество вещества необходимо для реакции с 12г магния при получении хлорида магния?
    9·1 answer
  • 7th grade science help me pleaseee
    6·1 answer
  • Whats a effect of this?<br> A wave enters a medium where its wave speed is higher.
    8·2 answers
  • 2. The electrons in a bond between 2 Iodine atoms are shared
    10·1 answer
  • Using a chemical equation to find moles of product from moles...
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!