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
Tanzania [10]
3 years ago
6

How many atoms are in 1.45 mol of pure aluminum

Chemistry
1 answer:
Serhud [2]3 years ago
7 0
Using Avogadro's number:

(1.45 mol)(6.022140857 x 10^23 atoms/mol) = 8.73 x 10^23 atoms

You might be interested in
Explain the difference between plant and animals cells in 4 sentences.
dexar [7]
The main structural differences between plant and animal cells are the additional structures found in plant cells. These structures include: chloroplasts, the cell wall, and vacuoles.
6 0
3 years ago
Rank and explain how the freezing point of 0.100 m solutions of the following ionic electrolytes compare. List from lowest freez
Elden [556K]

Answer:

The solutions are listed from the lowest freezing point to highest freezing point.

Mg₃(PO₄)₂ -  AlBr₃ - BeBr₂ -  KBr

Explanation:

Colligative property of freezing point, is the freezing point depression.

Formula is:

ΔT = Kf . m . i

Where ΔT = T° freezing pure solvent - T° freezing solution

Kf is the cryoscopic constant

m is molality and i is the Van't Hoff factor (number of ions, dissolved in solution)

In this case, T° freezing pure solvent is 0° because it's water, so the Kf is 1.86 °C/m, and m is 0.1 molal.

The i modifies the T° freezing solution. The four salts, are ionic compounds, so for each case:

BeBr₂  → Be²⁺  +  2Br⁻   i = 3

AlBr₃ →  Al³⁺  + 3Br⁻   i = 4

Mg₃(PO₄)₂  →  3Mg²⁺  +  2PO₄⁻³    i = 5

KBr →  K⁺  +  Br⁻   i = 2

Solution of Mg₃(PO₄)₂ will have the lowest temperature of freezing and the solution of KBr, the highest (always lower, than 0°).

8 0
3 years ago
What is the mass of 15100 mL of oxygen gas at STP?
adell [148]

Answer:

02 has a mass of 1.78 g.

Explanation:

hope this helps

5 0
2 years ago
Convert 18g of Li into atoms.
gizmo_the_mogwai [7]
The full decimal is 2.59328...
When you round up the answer is 2.6 atoms of Li
8 0
2 years ago
Viết công thức hóa học tạo bởi Mg và O
jasenka [17]
Phương trình hóa học: 2Mg+O2->2Mgo
3 0
2 years ago
Other questions:
  • Atoms bond to other atoms through their electrons. The following analogy will be used to help us understand how this occurs. Ima
    9·1 answer
  • On another planet, the isotopes of titanium have the following natural abundances.
    7·1 answer
  • Convert 4.86 x 104g of Mg to moles.
    13·2 answers
  • Describe why hydrogen bonds form between water molecules
    5·1 answer
  • A hydrate of copper (II) chloride has the following formula: CuCl2 - x H2O. The water in a 3.41-g sample of the hydrate was driv
    5·1 answer
  • Why is it useful to model systems that use energy?
    10·1 answer
  • When a metal such as copper is heated it expands. Explain
    9·1 answer
  • Which statements describe sedimentary rock? Check all that apply,
    7·2 answers
  • What is the difference between a helium atom and an alpha particle​
    13·1 answer
  • hi there I have a question see my teacher wants me to record my self in how to solve a math problem but am so scared of many rea
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!