Answer:
Explanation:
Thus, if we have 6.022 × 10 23 O atoms, we say we have 1 mol of O atoms. If we have 2 mol of Na atoms, we have 2 × (6.022 × 10 23) Na atoms, or 1.2044 × 10 24 Na atoms. Similarly, if we have 0.5 mol of benzene (C 6H 6) molecules, we have 0.5 × (6.022 × 10 23) C 6H 6 molecules, or 3.011 × 10 23 C 6H 6 molecules.
For example the atomic mass of methane (CH4)is 12 amu for the carbon plus 4 x 1 amu for the four hydrogens, for a total of 16 amu. Therefore the molar mass of methane is 16g. We say that one mole of methane has a mass of 16 g, and that there are 6.022 x 1023 atoms in that mass of methane.
The number of atoms present in 0.75 mole of methane, CH₄ is 4.515×10²³ atoms
Avogadro's hypothesis1 mole of CH₄ = 6.02×10²³ atoms
How to determine the atoms in 0.75 moleFrom Avogadro's hypothesis, we discovered that:
1 mole of CH₄ = 6.02×10²³ atoms
Therefore,
0.75 mole of CH₄ = 0.75 × 6.02×10²³
0.75 mole of CH₄ = 4.515×10²³ atoms
Thus, 4.515×10²³ atoms are present in 0.75 mole of CH₄
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Explain whether smoke filling up a room is diffusion or not.
Answer:
It is diffusion
Explanation:
Diffusion occurs when particles move from relatively high concentration to relatively low
Answer:
it is diffusion
Explanation:
smoke rises from one corner of the room and spreads to the rest of the room, resulting in diffusion
I need help with this question
Answer: atomic nucleus
Explanation:
Which type of force is the magnet using to move the nail?
A nail moving towards a magnet
A) Friction
B) Gravity
C) Pull
D) Push
Answer:
a
Explanation:
Answer:
Explanation:
gravity
If the Earth could no longer sustain human life, where could we go?
Answer:
There is no place in the solar system that can sustain humans except earth. Earth is the only planet that can sustain humans according to what we know and according to the technologies we have. We can live in Mars but the environment might not be suitable for growing vegetation and it might be hard for humans to live in Mars.
Explanation:
Hope this helped!
If the temperature of a gas in a balloon remains constant but the pressure
is decreased, the volume of the balloon will
decrease
increase
remain the same
not enough information to predict
Answer:
increase
Explanation:
if the pressure goes down then the gas will spread out more, meaning the volume will increase
what is the name for a change in the environment that causes an organism to change it's activity
Answer:
the answer is stimilus!
Explanation:
PLEASEEE HELP ASAPPPPP

Answer: answer A
Explanation: because it gives more detail and a summarizations
HELP HELP HELP HELP HELP
In order to properly measure the displacement, the object must be completely submerged, however in the diagram the wood is floating. So the measured displacement will only be a fraction of what it actually is.
which type of cell is shown in the diagram - a plant cell, a yeast cell or a bacterial cell
Answer:
bacterial cell plant cells dont have a tail
Explanation:
The type of cell shown in the diagram is the bacterial cell as plant cell do not have tails while bacteria have tail.
Bacteria are prokaryotic unicellular organisms. They have a relatively simple cell structure compared to eukaryotic cells. They also do not possess any membrane-bound organelles such as a nucleus. However, do they possess genetic material (DNA or RNA) in the intracellular space called the nucleoid.
Bacteria lack a membrane-bound nucleus and other internal structures and are therefore ranked among the unicellular life-forms called prokaryotes. Prokaryotes are the dominant living creatures on Earth, having been present for perhaps three-quarters of Earth history and having adapted to almost all available ecological habitats.
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How many atoms are in 4.3 moles of lithium?
how do the structures of particles in substances vary?
Answer:
56
Explanation:
Calculate the vapor pressure (in torr) of a 35°C solution of ethanol and propanol where the mole fraction of propanol is .75. Assume Ideal behavior P°ethanol35=100torr P°propanol35=36torr
The vapor pressure (in torr) of a 35°C solution : 52 torr
Further explanationGiven
x propanol = 0.75
P°ethanol=100 torr
P°propanol=36 torr
Required
the vapor pressure
Solution
Raoult's Law
P solution = xA.P°A +xB.P°B
x ethanol = 1- 0.75 = 0.25
Input the value :
P solution = 0.25 x 100 + 0.75 x 36
P solution = 25 + 27
P solution = 52 torr
Brainiest:):):):):):)
Answer:
1) Condensation
2) Temperature
3) Evaporation
4) Kinetic Energy
5) Sublimation
6) Thermal Energy
Rank the following compounds from weakest intermolecular forces to strongest. Justify your answers.
H2S I2 N2 H2O
Answer:
N2-non polar<i2< H2s-polar<H2o-polar
Explanation:
How many moles of NaCl are in 2.35 liters of a 4.67 M solution?
There are 10.97 moles of NaCl in 2.35 liters of a 4.67 M solution.
HOW TO CALCULATE NUMBER OF MOLES:The number of moles of a substance can be calculated by multiplying the molarity by the volume. That is;no. of moles = volume × molarity
According to this question, there are 2.35 liters of a 4.67 M solution. The number of moles is calculated as follows:no of moles = 2.35L × 4.67M
no of moles = 10.97mol
Therefore, there are 10.97 moles of NaCl in 2.35 liters of a 4.67 M solution.
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can the element calcium be found in more than one state of matter?
Answer:
No
Explanation:
The element calcium be found in more than one state of matter ( Only in Solid state )
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A teacher asks students to make a model of a transform plate boundary. The
students use blocks to represent tectonic plates and slide the blocks past each
other in the directions of the arrows as shown.
Transform Plate Boundary
Plate
Plate
Which event can the student best demonstrate with their model?
Answer:
C Earthquake
Explanation:
I just took this test and it’s on Quizizz
The event which best describes the model is an Earthquake. Earthquake is
formed when two plate boundaries collide with each other.
The plate boundaries colliding results in them being stuck. Pressure then
builds up between them which results in the plates breaking loose as time
goes on.
The movement that results from the plates breaking loose is what results in
an earthquake being experienced.
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1. Multiple Choice
How does altitude affect climate?
A.
The higher the altitude, the colder the climate will be.
B.
The lower the altitude, the colder the climate will be.
C.
The higher the altitude, the hotter the climate will be.****
D. Altitude is not related to climate.
2. How does latitude affect climate?
A.
Areas near the equator have cooler climates than areas far from the equator.
B.
Areas near the equator have warmer climates than areas far from the equator.
C.
Areas near the equator have four seasons.****
D.
Areas near the equator do not have any type of precipitation.
3. How does wind affect precipitation?
A.
Wind does not have any effect on precipitation.
B.
Winds that blow from over the land contain a lot of water vapor that will cause precipitation.****
C.
Winds that blow inland from oceans or large lakes contain very little water vapor that will cause precipitation.
D. Winds that blow inland from oceans or large lakes contain a lot of water vapor that will cause precipitation.
4. Sea and land breezes over a large region that change direction with the seasons are called
A.
windward.
B.
leeward.
C.
monsoons.****
D. storms.
(****= my answer)
plz cheak my answers!?
Answer:
#1 A
#2 B
#3 C
#4 c
Explanation:
#1 can give reference to a mountain the higher the altitude the colder it will get
#2 talking about climate not seasons per say. focus on climate answers
#3 wind carry moisture from the sea on to land which cause precipitation
#4 Monsoons is correct
im hella confused and need some help
The electron configuration for the Magnesium ION is the same as the configuration for which noble gas?
7. Although carbon's three isotopes are carbon-12, carbon-13, and carbon-14, its
average atomic mass is 12.01 because
A. carbon-12 is the heaviest isotope.
B. carbon-12 is most useful to humans.
C. carbon-12 is the most common isotope.
Answer:
B
Explanation:
carbon 12 is most useful to humans
According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas
Explanation:
an ideal gas moves in constant, rapid motion
If a substance is a bad conductor as a solid, but a good conductor as a liquid or when dissolved into water, which type of bond is holding the compound together?
The bond type in the substance is ionic bonding because, ionic compounds in their solid state are not conducting but the ions they furnish when dissolved in water conducts electricity.
What are ionic compounds ?Ionic compounds are formed between metals and nonmetals. Metals are electropositive and they can easily loss electrons to from cations. Metals donate electrons to the electron deficient non metals to achieve octet.
Ionic bonding is a strong electrostatic force between opposite charged ions. Hence this bond is stronger than other types of bond. This intact bonding make them bad conductors in the solid state.
However they are electrically conducting the molten state or when dissolved in water due to the presence of free ions and electrons in the solution.
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Explain how Newton’s cradle demonstrates the law of conservation of energy.
ANSWER FAST
Ozone (O3) is made of three atoms of oxygen. It is _____.
a mixture
an ion
a molecule
an element
In chemical reactions, what does the principle of conservation of mass mean?
If the number of hawks increases, the cricket population would most likely
Plant --> Cricket --> Frog --> Snake --> Hawk
•decrease
•remain the same
•increase
Answer:
Increase
Explanation:
Please help
How do Newton's lawd describe the motion of an object?
CAN SOMEONE HELP I WILL GIVE BRAINLIST PLEASE!
Answer:
water, wind, ice, gravity
Explanation:
does a high melting point mean the substance will melt faster or slower?
Answer:
slower...............
.
..
Answer:
it'll melt slower
Explanation:
because it needs to get to a higher temperature ig