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
umka21 [38]
3 years ago
15

How many moles are in 5.0 x 1025 atoms of iron

Chemistry
1 answer:
Mnenie [13.5K]3 years ago
8 0
1 mole --------------- 6.02 x 10²³ atoms
( moles iron) -------- 5.0 x 10²⁵ atoms

( moles iron ) = 5.0 x 10²⁵ x 1 / 6.02 x 10²³

moles iron = 5.0 x 10²⁵ / 6.02 x 10²³

= 83.05 moles of iron

hope this helps!
You might be interested in
How much water, in grams, can be made from 1.03 x <img src="https://tex.z-dn.net/?f=10%5E%7B24%7D" id="TexFormula1" title="10^{2
krok68 [10]

Answer:

30.8 g of water are produced

Explanation:

First of all we need the equation for the production of water:

2H₂ + O₂ → 2H₂O

2 moles of hydrogen react with 1 mol of oxygen in order to produce 2 moles of water.

As we assume, the oxygen in excess, we determine the moles of H₂.

1.03ₓ10²⁴ molecules . 1 mol/ 6.02ₓ10²³ molecules = 1.71 moles

Ratio is 2:2, so 1.71 moles will produce 1.71 moles of water

Let's convert the moles to mass: 1.71 mol . 18g / 1mol = 30.8 g of water are produced

5 0
3 years ago
In the following overall chemical reaction, aluminum displaces chromium from chromium(III) oxide and forms aluminum oxide.
mafiozo [28]

Answer:

Change in enthalpy for the reaction is -536 kJ

Explanation:

  • Overall chemical reaction can be represented a summation of two given elementary steps with slight modification.
  • Take reaction (1a) and divide stoichiometric coefficients by 2
  • Take reverse reaction (2a) and divide stoichiometric coefficient by 2
  • Then add these two modified elementary steps to get overall chemical reaction
  • \Delta H is an additive property. hence value of \Delta H will be changed in accordance with modification

2Al+\frac{3}{2}O_{2}\rightarrow Al_{2}O_{3}.....\Delta H_{1}=\frac{-3351.4}{2}kJ=-1675.7kJ

Cr_{2}O_{3}\rightarrow 2Cr+\frac{3}{2}O_{2}....\Delta H_{2}=\frac{2279.4}{2}kJ=1139.7kJ

--------------------------------------------------------------------------------------------------------------

2Al+Cr_{2}O_{3}\rightarrow 2Cr+Al_{2}O_{3}....\Delta H=\Delta H_{1}+\Delta H_{2}=-1675.7+1139.7kJ=-536kJ

6 0
3 years ago
A physical change is a change to a sample of matter in which -
Readme [11.4K]

Answer:

its FALSE

Explanation:

FAKE   ITS NOT REAL

8 0
3 years ago
What type of ossification occurs to form an immovable joint
ipn [44]

Answer:

The type of ossification that occurs is the endomembrane or endochondral.

Explanation:

In this type of joints called SYNARTROSIS, there is no intermediate formation of ligaments or cartilage, with which the bone does not grow from a cartilage ossification, but from undifferentiated cells that will calcify and form bone cells and the main bone units that are the OSTEONAS. The bones that present this type of joints are the skull, in the area of ​​the temporal bone (Temporary Suture) that grow abruptly throughout life and by mechanisms different from those bones that present a joint with movement.

5 0
3 years ago
Which agent would most likely
fredd [130]

Answer:

Wind

Explanation:

Most conifers and about 12% of the world's flowering plants are wind-pollinated. Wind pollinated plants include grasses and their cultivated cousins, the cereal crops, many trees, the infamous allergenic ragweeds, and others. All release billions of pollen grains into the air so that a lucky few will hit their targets.

7 0
2 years ago
Other questions:
  • An air sample consists of oxygen and nitrogen gas as major components. It also contains carbon dioxide and traces of some rare g
    6·1 answer
  • What is the general procedure from extracting a metal from its ore
    5·1 answer
  • For which type of titration will the ph be basic at the equivalence point?
    11·1 answer
  • How do catalysts affect energy of reactions
    10·2 answers
  • Which of the following explain why nonmetals are typically harder and more brittle than metals?
    14·2 answers
  • if you throw a heavy log into the fireplace, after it burns you are left with some ash. the ash has a mass much less then the ma
    13·1 answer
  • Why does a negatively charged rod force a stream of water away from the rod?
    14·1 answer
  • State the rank in the Brainly apk​
    7·1 answer
  • How many grams of Fe can be produced when 6.50 g of Fe2O3 reacts?
    6·1 answer
  • How do we determine the volume of an irreguler shaped object?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!