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
SIZIF [17.4K]
3 years ago
15

The radius of an atom of gold (Au) is about 1.35 Å. How many gold atoms would have to be lined up to span 9.0 mm ?

Chemistry
2 answers:
Georgia [21]3 years ago
8 0

We know that the relationship between angstrom and mm is 1:1x10^{-7}.

Knowing the radius of an atom of gold (1.35 angstroms), we can solve for how many atoms fit into 9.0mm:

\frac{1.35angstrom}{1} *\frac{1x10^{-7}mm}{1angstrom} =1.35x10^{-7}mm

\frac{9.0mm}{1} ÷ \frac{1.35x10^{-7}mm}{1}

\frac{9.0mm}{1} *\frac{1}{1.35x10^{-7}mm}=\frac{9.0x10^{0}}{1.35x10^{-7}}= 6.7x10^{7}

Therefore, we now know that 6.7x10^{7} atoms of gold (Au) will line up to span 9.0mm.

atroni [7]3 years ago
3 0

The radius of an atom of gold (Au) is about 1.35 Å. Gold atoms would have to be lined up to span 9.0 mm in the amount of 3.333 * 10^7

<h3>Further explanation </h3>

Gold is a chemical element with the symbol Au and atomic number 79. Its one of the higher atomic number elements that occured naturally. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal

The radius of an atom of gold (Au) is about 1.35 Å. How many gold atoms would have to be lined up to span 9.0 mm ?

Its known that the diameter of an atom is twice the radius = 2*1.35 angstrom = 2.70 angstrom

Then we convert the diameter of an atom in mm

2.70 angstrom * \frac{10^-10 m}{1 angstrom} cot \frac{10^3 mm}{1m} = 2.70 * 10^-7 mm

Then to calculate the number of the gold atoms, we have to divide 1 mm by the diameter of an atom

\frac{9 mm}{2.7*10^-7 mm} = 3.333 * 10^7

<h3>Learn more</h3>
  1. Learn more about gold brainly.com/question/1462511
  2. Learn more about atom brainly.com/question/11829675
  3. Learn more about The radius of an atom brainly.com/question/10452161

<h3>Answer details</h3>

Grade:  9

Subject:  chemistry

Chapter:  atom

Keywords:  span, The radius of an atom, atom, gold, mm

You might be interested in
Do you think sodium carbonate is an acid or base?
Reil [10]
I just looked it up and it says "Na2CO3 (sodium carbonate) is neither an acid nor a base. It is a salt..." I really hoped this helped you, if not I'm sorry.
7 0
3 years ago
You can use this article to help you! I will mark branlist!!
Nadusha1986 [10]

Answer:

1. producers would be things like plants if those were removed we would have no oxygen and herbivores would have no food

2. an area of all of the living things

3. Food chains overlap. They connect to form a food web

4.   can threaten the plants and animals that originally made up the ecosystem

5. Human activities that can disturb ecosystems include polluting and clearing land for farms or buildings

6. producer, consumer and decomposer

7. Decomposers break down the waste products and dead tissue of plants and animals. They return nutrients to the soil.

Explanation:

6 0
3 years ago
Complete the sentence. The atomic number of an element is found by counting the number of _______ in an atom. A. isotopes B. ele
Kipish [7]
D.) Protons............
8 0
3 years ago
Read 2 more answers
Convection _____.
givi [52]

occurs in fluids

Explanation:

Convection is a mode of heat transfer that occurs in fluids.

There are three types of heat transfer:

 conduction convection and radiation

  • Conduction is a mode of heat transfer that involves an actual contact between the molecules of the medium. It occurs mostly in solids
  • Radiation uses electromagnetic waves to transfer heat between two bodies or places. It does not require a material medium. The heat of the sun reaches us by radiation.
  • Convection is a mode of heat transfer in fluids. It involves the density differences between hot and cold liquids and gases.
  • Water boils by convection currents.

learn more:

Sun's energy brainly.com/question/1140127

#learnwithBrainly

6 0
3 years ago
Read 2 more answers
Worth 15 points!!! Choose ALL of the examples of a heterogeneous mixture, where the components are unevenly spread. THIS IS A MU
ycow [4]

Answer:

A

B

C

Explanation:

A B and C are heterogeneous because they don’t have all the same components throughout. D is homogeneous because kool aid dissolves into the water.

5 0
2 years ago
Other questions:
  • If a sample containing 2.50 ml of nitroglycerin (density=1.592g/ml) is detonated, how many total moles of gas are produced?
    13·1 answer
  • What substance is used in a nuclear reactor to absorb heat released from the reactor?
    7·2 answers
  • If 25.0g of H2O at 11.2 Celsius is combined with 75.0g H2O at 87.2 degree Celsius, what is the final temperature of the mixture?
    14·1 answer
  • A liquid is found to have a volume of 50 mL (in a graduated cylinder). When placed on a balance, the liquid and graduated cylind
    5·2 answers
  • Denver wonders if adding salt to water will make it boil at a lower temperature. What should he do next in order to follow the s
    10·2 answers
  • How is the sun classified​
    5·2 answers
  • When you remove energy from particles they move _____<br> and the matter _____
    7·1 answer
  • What is the pH of a solution with a [H+] = 1.0 x 10-5
    7·1 answer
  • The cubic centimeter, which is often abbreviated as cc or cm3, is a metric unit for
    14·2 answers
  • The density of a substance is 1.63 grams per milliliter. What is the mass of 0.25 liters of the substance in grams?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!