Air is a mixture of gases. Air is composed of molecules such as oxygen, nitrogen and carbon dioxide. Air also contains atoms of noble gases such as neon, argon etc.
Air is composed of 21% molecular oxygen and 78% molecular nitrogen. Also, there is about 0.03% of carbon dioxide molecules in air.
Air is generally defined as a mixture of gases owing to the number of gaseous substances that compose air.
Also, there is a trace amount of noble gases which largely exists as monoatomic species in air.
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When you hold a container, where should the label be?
Answer:
On the outside or something like that
The density of aluminum is 2.7 g.ml. what is the volume of 16.2 grams? HELP
Answer:
The answer is
6.0 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} [/tex]
From the question
density = 2.7 g/mL
mass of aluminum = 16.2 g
The volume is
[tex]volume = \frac{16.2}{2.7} [/tex]
We have the final answer as
6.0 mLHope this helps you
What is the broadest taxon in the modern classification
system?
a Phylum
b Order
C Kingdom
D domain?
Which of the following energy forms is associated with an object due to its position?
Group of answer choices
positional energy
potential energy
total energy
kinetic energy
Answer:
Potential Energy
Explanation:
If an object is suspended on a high level, it has high gravitational potential energy because it may fall at any moment
What is the percent abundance of Pt-198, if the average atomic mass of platinum is 195.16 and platinum has four naturally occurring isotopes? A) 6% B) 8% C) 25% D) 50%
Answer:
Explanation:
8%
Which statement describes one feature of Rutherford’s model of the atom?
Answer:
an atom mainly consists of empty space around the nucleus
Explanation:
Answer:
The atom is mostly empty space
Explanation:
E2020
identify and describe one common electrostatic phenomenon
Answer:
There are many examples of electrostatic phenomena, from those as simple as the attraction of the plastic wrap to one's hand after it is removed from a package to the apparently spontaneous explosion of grain silos, the damage of electronic components during manufacturing, and photocopier & laser printer operation
Which element is malleable and ductile?
○Flourine O Gallium
O Silicon O Phosphorous
Answer:
Gallium
Explanation:
The element that is malleable and ductile is gallium.
Gallium is a metal that exhibits the properties of malleability and ductility.
The ability of a material to be hammered or rolled into thin sheets without breaking or shattering is referred to as malleability. This characteristic of gallium makes it simple to shape or flatten it under pressure without shattering.
Contrarily, ductility describes a material's capacity to be pulled into thin wires without cracking. Gallium is ductile, which means it can be bent into the shape of thin wires without breaking.
Therefore, the correct option is gallium.
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What are characteristics of reliable science?
A. Bias and controlled variables .
B. Controlled variables and small test groups.
C. Empirical data and bias .
D. Replicable results and empirical data .
Answer:
Replicable results and empirical data.
Explanation:
Answer:
D
Explanation:
Replicable results mean that the question or test can be replicated to prove the subject in manner. Empirical data means that the question or test can be resolved with the same data, so for example, if a chemist discovers a new chemical equation, they need to write down the formula.
The Coronavirus invades 2 types of cells in the lungs, mucus cells and __________.
cilia cells
air cells
blood cells
breathing cells
Answer:
cilia cells
Explanation:
recall what you have learned about continental drift and tectonics. sort the information into the correct categories
Answer: Continental Drift - Pangea broke and spread apart, Continents were once landmass
Plate Tectonics - Lithosphere is made of large pieces, Plates move and interact, Landforms result from moving plates.
Explanation: Your welcome.
Answer:
Just for the persons that want to be sure.
ANALYZE Define a system you interact with every day. Is the system
open, closed, or isolated? How do matter and energy flow into, out
of, or within the system?
Answer:
A system that we use daily or almost every day is, for example, when boiling water for cooking.
Explanation:
This is the case of an open system.
Boiling water in a pot without a lid, exchanges heat energy and mixes with its surroundings when it enters a gaseous state.
The energy introduced into the system by the fire transforms the water into gas, which is released back into the environment. Without that constant heat injection, the water will stop boiling; and without room to get out, the steam (matter) will increase the pressure until the pot burst.
You can find examples like these anywhere, knowing the definition of each system:
Open systems. The most predominant of all, are characterized by exchanging energy and / or matter with the environment that surrounds them, either taking from it, expelling towards it or both. Closed systems. Unlike the previous ones, they exchange energy (heat, work) with the outside, but never matter (their mass remains intact). Isolated systems. They are so called because they do not exchange energy or matter of any kind with their environment, they are considered a system disconnected from the dynamics around them. Completely isolated systems do not really exist in the universe, so they are considered cases of abstraction in determined periods of time. They are assumed in thermodynamic equilibrium.The human body has four types of tissues, and the eye contains all four. Which statement correctly pairs the part of the eye
with the tissue type? (1 point)
Epithelial tissue is found in the sclera, the white part of the eye.
Muscle tissue is found in the iris, the colored part of the eye.
O Connective tissue is found in the comea, the outermost lens of the eye.
Nerve tissue is found in the retina, the rods and cones at the back of the eye.
Answer:
The correct answer is D) Nerve tissue is found in the retina, the rods and cones at the back of the eye.
Explanation:
The rods and cones are photoreceptors (that is nerve cells within the eyes that can sense light) which is situated in the retina.
These photoreceptors also sense colours and send these signals into the optic nerve for transmission to the brain.
Cheers
Need help with this
Answer:
Environmentalism
Explanation:
Environmental Science is the pursuit of knowledge about the environment, while Environmentalism as you know, "a social movement dedicated to protecting the natural world and people from undesirable changes".
Of these non-metals which one is likely to be least reactive
Answer:
the answer is the swecond option
Explanation:
Its b ur well come
Which statement is a conclusion?
O A Floriste put cut flowers in eugar water, so flowers in sugar water
stay fresh longer
B. Cut flowers placed in sugar water stay fresh longer than flowers
placed in regular water.
C. It's better to give people balloons than cut flowers that will die.
D. How can cut flowers stay fresh for a longer period of time?
What is the answer
Answer:
Explanation:
B. Cut flowers placed in sugar water stay fresh longer than flowers
placed in regular water.
Answer:
B
Explanation:
Just got question right on quiz!!! <3
How does inclusions represent the principles
Will give 15 points
fountain experiment is related to......... gas.
1.Oxygen. 2.nitrogen
3.carbondioxide. 4.ammonia
Answer:
4. ammonia
fountain experiment is related to ammonia gas.
An earthquake on the ocean floor produced a giant wave called a tsunami. The tsunami traveled through the ocean and hit a remote island, causing a lot of damage. Is the water that hit the island the same water that was above the earthquake on the ocean floor?
Answer:
Yes
Explanation:
What cause an earthquake is when the earth plates shift and if theirs a drop in the tentonic plates a ripple effect like when you drop something in water will occur. The plates shift down the water in which the plate shift down the water will go in that direction due to gravity, but instead of equalizing the water will pick up some speed and velocity and begin to form a wave now. When an tsunami happens you know it coming cause the water moves back cause the water is picking up to much speed and due to cohesion its moves along with the move water and builds up. Creating a massive tidal wave known as tsunamis.
The water that hit the island is not the same water that was above the earthquake on the ocean floor. Waves transfer energy not matter.
It should be noted that the earthquake on the ocean floor that produces a giant wave referred to as a tsunami is quite different from the water that hits a remote island, causing a lot of damage.It should be noted that waves transfer energy but not matter. While waves are able to transfer energy over a particular distance, it doesn't move the matter along the same distance.For example, it should be noted that an ocean wave is able to travel for several kilometers while the water itself doesn't move.In conclusion, waves transfer energy not matter.
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under the same conditions of temperature and pressure, three different samples of the same uniform
a. shape
b. density
c. mass
d. volume
Answer: B
Explanation: Have to be careful here.Clearly, the samples could have different mass, and COULD have different volume and they could be either solid, liquid or gas.
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Under the same conditions of temperature and pressure, three different samples of the same uniform shape.
The density of a substance is in intrinsic property. Irrespective of the temperature and pressure or any other condition, the density of a substance will not change.
Mass is the quantity of matter in a substance and it is not affected by the temperature or pressure of the object.
The volume of the a substance changes with change in temperature and pressure but we have been told that these conditions are the same so the volume of the object does not change.
However, if the objects are exactly uniform, at the same temperature and pressure, the objects will have the same shape.
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Your mass is the amount of matter or “stuff” in your body. How would your mass on the moon compare to your mass on earth? A. Greater on the moon. B. Less on the moon. C. Same on earth and moon.
B. Less on the moon.
Mass and WeightAn object's mass is a measure of its inertial property, or the quantity of matter it contains.The weight of an object is a measure of the force imposed by gravity on the object, or the force required to support it.As the moon's gravitational force is roughly one-sixth that of the Earth's, one's weight on the moon would be roughly one-sixth that of the Earth.Mass is the amount of matter or “stuff” in the body. One's mass is B. Less on the moon.For more information:
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graphite conducts electricity but dimond does not .why?
Graphite can conduct electricity because of the delocalised (free) electrons in its structure. These arise because each carbon atom is only bonded to 3 other carbon atoms. ... However, in diamond, all 4 outer electrons on each carbon atom are used in covalent bonding, so there are no delocalised electrons.
It is 762 miles from here to Chicago. An obese physics teacher jogs at a rate of 5.0 miles every 20.0 minutes. How long would it take him to jog to Chicago if he jogged continuously and REALLY wanted to get there?
Answer:
3,048 minutes
Explanation:
762 divided by 5
that number times 20
The time required for a physics teacher to jog continuously and REALLY wanted to get there will be 50 hours and 48 minutes.
What is speed?The distance covered by the particle or the body in an hour is called speed. It is a scalar quantity. It is the ratio of distance to time.
We know that the speed formula
Speed = Distance/Time
It is 762 miles from here to Chicago. An obese physics teacher jogs at a rate of 5.0 miles every 20.0 minutes.
Then the speed of the physics teacher will be
Speed = 5 / (20 / 60)
Speed = 15 miles per hour
The time required for a physics teacher to jog continuously and REALLY wanted to get there will be
15 = 762 / T
T = 762 / 15
T = 50.8 hours
T = 50 hours and 48 minutes
The time required for a physics teacher to jog continuously and REALLY wanted to get there will be 50 hours and 48 minutes.
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are Molecules are large atoms
Answer:
no molecules are very small atoms
A student reports the density of an article to be 1.92 g/mL. The accepted value of density is 1.89 g/mL. Calculate the student's percent error.
Answer:
1.59%.
Explanation:
The following data were obtained from the question:
Measured density = 1.92 g/mL
Accepted density = 1.89 g/mL
Percentage error =...?
The percentage error error of the student can be obtained as follow:
Percentage error = |Measured density – Accepted density |/Accepted density × 100
Percentage error = |1.92 – 1.89|/1.89 × 100
Percentage error = 0.03/1.89 × 100
Percentage error = 1.59%
Therefore, the student percentage error is 1.59%
is ripping paper a chemical or physical app
Answer:
physical change
Explanation:
it doesnt change it chemically
Answer:
Ripping paper is physical
Explanation:
The way you know if it is physical or not is does it change physically, any physical change
No chemical changes occurred because the chemical matter didn't change nor did the actual object, it's not like the paper turned into a hotdog so it would be physical (if that makes any sense ;))
what is common to nuclear fission?
Answer:
235 U ( the isotope of uranium with mass number 235) and 239Pu(the isotope of plutonium with mass number 239
Explanation:
mmmmmmmmm
write down the importance of nitrogen cycle
Answer:Nitrogen is a crucially important component for all life. ... It is an important part of many cells and processes such as amino acids, proteins and even our DNA. It is also needed to make chlorophyll in plants, which is used in photosynthesis to make their food.
Choose the best description of a covalent bond from the choices below.
A. Two water molecules interact due to partial charges on the oxygen and hydrogen atoms.
B. A magnesium donates electrons and forms bonds with two chloride ions.
C. A bond forms between a hydrogen from one molecule and a nitrogen from another molecule.
D. A positive potassium ion forms a bond with a negative chloride ion.
E. A nitrogen atom shares electrons with three hydrogen atoms
Answer:
A. Two water molecules interact due to partial charges on the oxygen and hydrogen atoms
Explanation:
A covalent bond is formed when the sharing of the two electron pairs and creates a stable balance of attractive and repulsive forces. The sharing allows the atoms to attain the equivalent of the outer shell. Sharing corresponds to the stable electronic configuration.A sample of platinum has a mass of 16.1 g and a volume of 0.75 cm^3. What is the density of platinum?
