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
agasfer [191]
3 years ago
13

How many atoms are in a grain of sand??

Biology
2 answers:
Naily [24]3 years ago
8 0
Avogadro tells us that we have 6.023 x 10^23 SiO2 units per gram, so there would be 6.023 x 10^23 / 60 ≈ 1 x 10^22 SiO2 units in a gram of pure SiO2, and with SiO2 composed of 3 atoms<span>, that puts us at </span>3<span> x 10^22 atoms per gram of SiO2. Now, a grain of sand does not weigh 1 gram. It weighs less</span>
34kurt3 years ago
5 0
5 x 10^19 atoms in standard expression. hope this helps
You might be interested in
Which graph most likely represents a rabbit population that found a new, larger habitat, but then eventually experienced an
klio [65]

The graph will have a sharp curve in upwards manner when the new, larger habitat is found, but than will be followed by slight decrease when the predation increases.

Explanation:

If a population of rabbits finds a new, larger habitat, than the population will experience rapid rise, especially if there isn't high scale predation on them. This will be due to the abundant food resources, but also because of the fast reproduction of the rabbits. The low predation will mean that most of the rabbits will survive, so the numbers will be on the rise.

When the population starts to experience in increase in predation, the situation changes. The larger number of predators means that they would need much more food, so much more rabbits will be killed and consumed by the predators. This will stop the population rise, and it will either stagnate, or most probably it will experience slight decline.

Learn more about predators brainly.com/question/13972034

#learnwithBrainly

3 0
3 years ago
HELP PLEASE!!!!!!!
Fittoniya [83]
I believe the answer is B
4 0
3 years ago
Predict the likely effect on the ability of substance L to enter the cells if substance L is attached to a large protein instead
LenKa [72]

Answer:

The cell membrane is semi-permeable. It allows some molecules to enter easily inside the cell whereas some molecules are blocked from entering the cell.

Small, polar molecules and hydrophobic molecules enter easily through the cell membrane. But large molecules and ions cannot easily move inside the cell membrane.

A hydrophilic substance like the substance L mentioned in the question enters the cell membrane through the help of carrier proteins. The substance attached to the large protein might enter through active or passive diffusion but it can only enter the cell by attaching to carrier proteins.

8 0
3 years ago
Read 2 more answers
According to the passage on the left, why were many homesteaders forced to abandon their claims?
snow_lady [41]

Answer:

Climate and slavery

Explanation: Slaves were the main reason that there was food before the end when Abraham was president. Climate and slavery can change how the crops were grown. I'd also say the geography was messed up then due to the climate. (sorry if wrong Q-Q)

8 0
2 years ago
Read 2 more answers
Human overpopulation will likely lead to more extinctions of species because
kherson [118]
D.habits will be altered
7 0
2 years ago
Read 2 more answers
Other questions:
  • Select one:<br> a. II<br> b. IV<br> c. III<br> d. I
    6·1 answer
  • The health of a watershed cannot be indicated by the number and diversity of organisms.
    11·2 answers
  • Please help! thank you!!
    5·1 answer
  • The development of nuclear power has provided electricity for less money, but at a cost. What may be considered a "cost" of nucl
    12·1 answer
  • A towing company charges $40 to hook a car and $1.70 for each mile that is towed. Write an
    7·1 answer
  • Which phase of meiosis separates homologous chromosomes?
    6·2 answers
  • There are ____ amino acids? <br><br> 1<br> 10<br> 20<br> 40<br> 50<br> 100<br> an infinite number of
    9·1 answer
  • Help please, 20 points.
    13·1 answer
  • What does the prefix "atmos" mean?<br> A. air<br> B. soil
    8·2 answers
  • A new canal built through the desert separates a population of tortoises into two new populations. After two hundred
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!