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
Leviafan [203]
3 years ago
10

What is the mass of 7 x 10^28 atoms of Fe?

Chemistry
1 answer:
Nostrana [21]3 years ago
4 0

Answer:

6 x 10⁶ g Fe

Explanation:

Step 1: Set up dimensional analysis

7 x 10²⁸ atoms Fe (1 mol Fe/6.02 x 10²³ atoms Fe)(55.85 g Fe/1 mol Fe)

Step 2: Multiply, divide, and cancel out units

atoms Fe and atoms Fe cancel out.

mol Fe and mol Fe cancel out.

We should be left with g Fe.

7 x 10²⁸/6.02 x 10²³ = 116279 mol Fe

116279(55.85) = 6.49 x 10⁶ g Fe

Step 3: Sig figs

There is only 1 sig fig in this problem.

6.49 x 10⁶ g Fe ≈ 6 x 10⁶ g Fe

You might be interested in
Is [Ni(CO)4] considered as coordination compounds?
Harlamova29_29 [7]
Nickel carbonyl (IUPAC name: tetracarbonylnickel) is the organonickel compound
7 0
3 years ago
What do gamma rays consists of?
kenny6666 [7]
Gamma rays consist of pure energy. Beta particles consist of one electron that is released at high speeds from an unstable nucleus and an alpha particle is a helium nucleus.

We know that Gamma rays consist of pure energy because, during Gamma decay, the atomic and mass numbers remain unchanged. Therefore, only energy is emitted.

Gamma rays are weakly ionising, however, they are strongly penetrating and thick concrete or a few centimetres of aluminium is needed to stop them.  
4 0
3 years ago
Read 2 more answers
What speeds up a chemical reaction
storchak [24]
Catalyst can speed up chemical reaction without being used up or involved in thr reaction..
5 0
3 years ago
Which of the following would be the best representation of input energy and then
Rom4ik [11]
A is the correct answer
4 0
3 years ago
1.For the reaction P4 O10(s) + 6H2O(l) → 4H3PO4(aq), what mass of P
Alex17521 [72]
P₄O₁₀ + 6H₂O → 4H₃PO₄
The equation shows us that the molar ratio of
P₄O₁₀ : 6H₂O = 1:6

We also know that one mole of a substance contains 6.02 x 10²³ particles. We can use this to calculate the moles of water.
moles(H₂O) = (5.51 x 10²³) / (6.02 x 10²³)
= 0.92 mole
That means moles of P₄O₁₀ = 0.92 / 6
= 0.15

Each mole of P₄O₁₀ contains 4 moles of P. 
moles(P) = 4 x 0.15 = 0.6 mol
Mr of P = 207 grams per mol
Mass of P = 207 x 0.6
= 124.2 grams
5 0
3 years ago
Read 2 more answers
Other questions:
  • Why are some elements more reactive than others?
    12·2 answers
  • Describe at least two differences between ionic and covalent bonds.
    9·1 answer
  • What is the number of kilograms of solvent in a 0.70 molal solution containing 5.0 grams of solute?
    5·1 answer
  • Marina is creating a flow chart of the mechanics of mantle convection and how it relates to tectonic plate movement.
    11·2 answers
  • If δh°rxn and δs°rxn are both positive values, what drives the spontaneous (favored) reaction and in what direction at standard
    14·1 answer
  • Ron weasley isn't the best experimentalist. after an experiment he ends up with only 3.10 g of product. however, the same reacti
    12·1 answer
  • 14. Energy (heat) is always transferred from ___ energy to ___ energy
    8·1 answer
  • Name two metals which will not liberate hydrogen from<br>dilute tetraoxosulphate(vi) acid.​
    15·1 answer
  • The polyatomic nitrate ion (NO3−) is present in both the products and the reactants of the chemical equation shown below.
    12·1 answer
  • If a negatively charged ion is more concentrated outside the cell, the forces required to balance the chemical gradient would be
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!