One million argon atoms is how many mol of argon atoms? (2 significant figures)
Answers
Answer:
1.66 * 10^-18 mol of Argon
Explanation:
Avogadro says 1 mol of anything has 6.022* 10^23 atoms/particles. Thus using this principle, 1 million argon atoms will have
\(1,000,000 atoms Argon * \frac{1mol Argon}{6.022*10^{23} atoms }\)
\(1.66*10^{-18} mol \\\\ of Argon\)
One million argon atoms is equivalent to 1.7 × 10⁻¹⁸ moles of argon atoms.
To convert one million (10⁶) argon atoms to moles of argon atoms, we will use Avogadro's number: there are 6.02 × 10²³ argon atoms in 1 mole of argon atoms.
\(10^{6} atom \times \frac{1 mol}{6.02 \times 10^{23}atom } = 1.7 \times 10^{-18} mol\)
One million argon atoms is equivalent to 1.7 × 10⁻¹⁸ moles of argon atoms.
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Related Questions
When an organism uses chemical energy to move, some of it is lost as (blank) energy.
(science middle school answer pls)
Answers
Answer:
When an organism use chemical energy to move, some of it is lost as metabolic heat.
The term chemical energy is defined as the energy which is stored in the bonds of chemical compounds. It is given in the chemical reaction and mostly produces heat as a by-product, known as an exothermic reaction.
Energy changes as it moves up trophic levels because energy is lost as metabolic heat when the organisms from one trophic level are taken by organisms from the next level.
Thus, Metabolic heat is lost when an organism uses chemical energy to move.
...
Answer:
When an organism use chemical energy to move, some of it is lost as metabolic heat.
I think this is it, hope this helps!
The enthalpy of formation of water is –285.8 kJ/mol. What can be inferred from this statement? The enthalpy of the products is equal to the enthalpy of the reactants. Heat is absorbed during the process. Heat is released during the process. The enthalpy of the products is more than the enthalpy of the reactants.
Answers
Answer:
Heat is released during the process.
Explanation:
From the information provided in question, the enthalpy of formation of water is –285.8 kJ/mol. This is simply an exothermic reaction.
The negative sign indicates that the enthalphy of the reactants is more than the enthalphy of the products and as such, heat is released from the system into the surroundings.
The enthalpy of formation of water is –285.8 kJ/mol means that heat is released during the process.
What is enthalpy of formation of a substance?The enthalpy of formation of a substance is the amount of heat given off or absorbed when one mole of a substance is formed from the reactants.
A positive value for enthalpy means the reaction is endothermic while a negative value for enthalpy means the reaction is endothermic.
Therefore, the enthalpy of formation of water is –285.8 kJ/mol means that the reaction is exothermic and heat is released during the process.
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How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
How do planets with larger masses apply greater gravitational forces on objects compared to planets with less mass?
Answers
Answer:
more massive objects will attract each other with a greater gravitational force. So as the mass of either object increases, the force of gravitational attraction between them also increases.
Why is it important to know how the sun's energy affects the lower atmosphere if you are planning to harness the power of moving air?
Answers
It is important to know the affects of temperature on pressure and thereby on winds. At high temperature, the pressure will be high and thus, the winds will pass from that area.
What is winds?
Wind is the passage of air through the atmosphere. The uneven distribution of temperature leads to the difference in pressure. The pressure gradient results in wind.
Air pass from high pressure area to low pressure area. According to Gay- Lussacs law, at the pressure gases is directly proportional to the temperature.
Hence, as the temperature increases, pressure in that area increases, leads to air currents to the opposite direction. This will definitely affects harnessing.
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1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL
Answers
To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.
ANSWER ASAP PLEASE
According to this table, which star has the highest absolute brightness?
a. Betelgeuse
b. Rigel
c. Bellatrix
Answers
Answer:
B. Rigel
Explanation:
Is the size of the country an important factor in how much helium that can be found there?
Answers
Brainless pls
Explanation:
Accordingly, any attempt to determine where the helium market will be more than a few years ... and/or recover helium can reduce the amount of helium consumed by as much as a factor ...
Answer:
Explanation:
Accordingly, any attempt to determine where the helium market will be more than a few years ... and/or recover helium can reduce the amount of helium consumed by as much as a factor..
What is an ellipse please help)
Answers
In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. As such, it generalizes a circle, which is the special type of ellipse in which the two focal points are the same.
Maybe they might use that math thing for Science.
If a substance has a density of 19 g/cm3, then what is the mass of 8 cm3 of this substance?
Answers
A diamond’s density is 3.2 g/cm3.
Determine the volume of a diamond that has a mass of 1 g.
Answers
Answer:
https://socratic.org/questions/diamond-has-a-density-of-3-52-g-ml-what-is-the-volume-in-cubic-centimeters-of-a-
please help
I've finished all my other questions but I'm really stuck on these two
Answers
Answer: 66.66 / 66.67 / 66 2/3 hydrogen 33.33 / 33 1/3 oxogen
for question e
in grams of course
hydrogen: 33.33/33 1/3 oxogen
The shape of the illuminated portion of the Moon as seen by an observer, usually on Earth:
1. Lunar Eclipse
2. Solar Eclipse
3. Moon Phases
4. The Sun
Answers
Answer:moon phases
Explanation:
Moon phases because the moon phases changers every day
G
A substance occupies one half of an open container. The atoms of the substance are closely packed but are still
able to slide past each other.
What is most likely the phase of the substance?
gas
liquid
solid and gas
O liquid and solid
Mark this and return
Save and Exit
Next
Submit
Answers
Answer:
Solid and gas
Explanation:
How does an atom change if all of its electrons are removed?
p.s. I'll mark the first answer the brainliest if it is correct! ;)
a. The atom’s volume increases.
b. The atom’s mass increases.
c. The atom becomes positively charged.
d. The atom becomes negatively charged.
Answers
c. The atom becomes positively charged
if the electrons are removed it means theres no longer a negative charge to balance the positive charge of the protons in the atom
EASY
To answer this question, you will read two articles. First, read Article 1.
Planning for the construction of O'Hare International Airport began in 1945 when a committee chose Orchard Field as the location of the future airport. In 1955, the airport opened to commercial air traffic and O'Hare International Airport served as a hub for travelers throughout the world.
To respond to the increasing number of passengers, the airport expanded. O'Hare added a fifth runway and opened a terminal for international travel. Passengers could take flights to other countries and throughout the United States. The amount of land used by the airport grew to about 7,200 acres. This expansion included airplane hangars, cargo buildings, and even a post office. Next, there was an expressway built to connect O'Hare International Airport with downtown Chicago. People could travel to and from the airport quickly and easily, making it a desirable location. Finally, the main terminal building and parking lot were completed. These expansions led to a greater number of passengers. In 1962, 10 million passengers traveled through the airport that year alone. O'Hare was officially the world's busiest airport.
O'Hare's growth was accompanied by innovation. In order to increase efficiency, the airport developed a task force that allowed three runways to be used at the same time in 1976. The Passenger Facility Charge, which charged passengers for using the airport, was introduced in 1990. This money was used to improve and modernize the airport. The Airport Transit System was created to help transport passengers between terminals in 1993. In 1996, the O'Hare Noise Compatibility Commission was created to help surrounding neighborhoods deal with aircraft noise. To aid with the O'Hare Modernization Program, a Sustainable Design Manual was created in 2003. This cutting-edge document helped the airport think about the environment during the modernization process. The principles outlined in the manual were later used in a similar document in August 2009 that promoted environmental sustainability at the airport. Over the years, O'Hare International Airport has grown and innovated to manage its expansion.
Read Article 2 and answer the question.
Between O'Hare and Midway International Airports, over one thousand flights depart Chicago every day. When planes take off and land, they create vibrations. These vibrations create noise in Chicago neighborhoods. In the early days of both airports, the city of Chicago realized that aircraft noise was a problem. People were unable to talk on their phones, watch television, or sleep peacefully at night.
In 1996, the O'Hare and Midway Noise Compatibility Commissions were created to help solve the noise problem. The Commissions searched for ways to reduce the effect of aircraft noise on the surrounding neighborhoods. First, pilots and air controllers volunteered to follow the Fly Quiet Program. The program suggested that pilots use runways and flight paths over forests, highways, and industrial areas at night. By avoiding housing areas, pilots and air controllers decreased the noise level of the airplanes in these areas. That way, people would be able to sleep.
Next, the commissions focused on using sound insulation in homes near the airports. If residents lived in an area that experienced a high volume of noise, then they were eligible to have their homes insulated. Residents were given different options. Their homes could be insulated by installing special windows, doors, or air conditioning. Similar steps were also taken to insulate private and public schools in the affected areas.
The continued presence of the O'Hare and Midway Noise Compatibility Commissions is evident today. An Airport Noise Management System uses noise monitors to measure the noise levels in neighborhoods each day. A Community Outreach Vehicle distributes information about aircraft noise. Residents can use the Flight Tracker program. This online program shows images of where planes fly. If there is still a problem with noise, people can call the hotline or complete an online form.
How is the structure of Article 1 different from the structure of Article 2?
Article 1 uses cause and effect to show the impact of the airport's expansion, while Article 2 uses chronological order to show the steps taken to reduce noise over time.
Article 1 uses comparison and contrast to describe the airport in the past and present, while Article 2 uses cause and effect to show how aircraft noise angered the surrounding neighborhoods.
Article 1 uses chronological order to show the events that led to the present airport, while Article 2 uses a problem and solution text structure to show how noise is reduced in neighborhoods around the airports.
Article 1 uses problem and solution to show the issues faced by the growing airport, while Article 2 uses comparison and contrast to show the difference insulation makes.
Answers
Answer:
It would be answer C. Article 1
uses chronological order to show the events that led to the present airport, while Article 2 uses a problem and solution text structure to show how noise is reduced in neighborhoods around the airports.
Explanation:
help me fill this page with the right answer please (17 lines minimum please)
Answers
Describe one way in which each of the items you listed in Part 1 could be at least temporarily disrupted from equilibrium. Can you think of a way your body could respond to restore homeostasis after one of these disruptions? (3 points) Think about things that stress the body or do not supply the body's needs properly.
Answers
Answer:
Not enough exercise, not enough water, not a healthy diet. Consume fluids regularly during exercise, and drink 16 ounces of fluid for every pound lost during your workout.
Explanation:
If you put a hot dog into piranha solution, what happens?
it dissolves
becomes electroplated with salt
noithing - nonreactive
produces carbon triethylium oxide gas
Answers
Answer:
3
Explanation:
More scientificly explained
Identify the rock that forms at A.
Sedimentary
Metamorphic
Igneous
Identify the rock that forms at D.
Sedimentary
Metamorphic
Igneous
Identify the rock that forms at C. *
4 points
Sedimentary
Metamorphic
Igneous
Answers
D. Igneous
C. Sedimentary
What type of person studies and collects data on the weather?
Answers
What greatly affects how scientists (and you) look at and interpret evidence?
Answers
Answer:
their world view is the correct answer
What sphere interacts when chemicals in the Air cause Weathering to Rocks? *
20 points
A. atmosphere & biosphere
B. atmosphere & geosphere
C. atmosphere & hydrosphere
D. biosphere & hydrosphere
Answers
Answer:
atmosphere & biosphere
What happened when the two substances were combined together in the cup? (highlight one)
The substances changed into different substances.
The substances did not change into different substances.
I am not sure if the substances changed into different substances.
Explain your answer using evidence from the Sim.
Answers
Based on evidence from Sim, when two substances were combined they did not change into different substances.
Here the word Sim is used to describe the process simulation. Simulation is defined as when two substances combined they do not change into different substances.
They just combine together and form a new substance.
Let us understand it as the first substance is liquid and the second substance is solid then when we combine both of them they form a new mixture but do not change their property.
The mixture is still liquid but it also has some properties of solid substance.
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The substances did not change into different substances.
Based on the information provided in the question, there is no evidence or indication of any chemical reaction or change in the substances when they were combined in the cup. The question does not mention any observations or effects that would suggest a chemical transformation.
If there were a chemical reaction or change, it would typically be accompanied by observable signs such as color change, gas production, temperature change, or formation of a precipitate. However, since the question does not provide any evidence or observations of such changes, we can conclude that the substances did not undergo any chemical transformation when combined.
It is important to note that without additional information or details about the substances and their behavior, it is not possible to make definitive conclusions. However, based on the given information, the most reasonable conclusion is that the substances remained unchanged when combined in the cup.
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Can somebody help me with this, please? Please Asap
Answers
Answer:
im not sure what exactly you want? if its answering the questions then search up each one and rephrase the answers you get, for instance for mitochondria is the powerhouse of the cell. just write something simple thats what i did when i had to do something like this it took only a couple of minutes
Explanation:
The Organelles help the cell to function efficiently.
What are the organelles in the cell?I can see that your question has to do with the organelles in the cell but I don't quite get the analogies that you intend to use. However, I would explain the organelles one after the other.
Endoplasmic reticulum: The endoplasmic reticulum (ER) is a network of membranous tubes and sacs within the cytoplasm of eukaryotic cells. It serves as a transport system for proteins and lipids, as well as a site for folding and modification of newly synthesized proteins.
Ribosomes: Ribosomes are complex molecular machines that are found in the cytoplasm of all living cells. They are responsible for synthesizing proteins from amino acids, which are the building blocks of proteins.
Mitochondria: These are organelles found in the cytoplasm of eukaryotic cells. They are often referred to as the "powerhouses" of the cell because they are responsible for producing most of the cell's energy in the form of ATP (adenosine triphosphate).
Vacuole: Vacuoles are membrane-bound organelles found in eukaryotic cells. They are large, fluid-filled compartments that serve several important functions within the cell, including storage of nutrients and waste, regulation of the cell's water balance, and maintenance of cell shape.
Cytoplasm: Cytoplasm is the gel-like substance that fills the interior of eukaryotic cells, excluding the nucleus. It is a complex mixture of water, ions, organic molecules, and a variety of cellular structures, including organelles such as mitochondria, ribosomes, endoplasmic reticulum, and lysosomes.
Lysosomes :Lysosomes are membrane-bound organelles found in eukaryotic cells. They are referred to as the "garbage trucks" of the cell because they are responsible for breaking down and recycling cellular waste and unwanted material.
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What is the charge on the Cr in Cr2O72-
Answers
Answer:
+6.
Explanation:
So, a chromium atom here has an oxidation number of +6.
What are some causes of climate change?
Answers
Candice did an experiment where wondered if temperature affects how cheese molds. She put a piece of cheese next to a different heat lamp and then measured how much mold was on each cheese. What is the DEPENDENT variable?
Answers
Ok so, you know how people say “there is never clocks in dreams, like digital clocks, watches, wall clocks, clocks on phones”?
I just had a dream a few minutes ago and there was a clock, the clock was flashing “6:50” , (I have a really big fear of being late to things, like school for example) but after it hit “6:59” it would flash rapidly “0:00” and then it seemed like time warped into nothingness, after that I woke up to my alarm going off and it said “5:09” so I was seriously confused, especially on the fact people say you’ll never see clocks in dreams and this is the first time I actually seen one-
(Dunno what this would be, Ik it’s something with Psychology , BUT BRAINLY HAS NO PSYCHOLOGY OPTIONS!)
Answers
Answer:
scary.
Explanation:
I have had a dream before where I was trapped in a dream. I woke up into another one. 3 times in dream. Also I have seen a couple clocks in my dreams as well.
Match the term to its definition (Lessons 6.03, 6.04 and 6.05)
(i can't fit this all without confusion)
Answers
Answer: the first paragraph is rain forest biome and the 2nd one is arctic tundra biome and finally the last paragraph is ocean or marine biome
Explanation:
rain forests have warm temperatures and include alot of animals and plants , artctic tundra biome includes cold temperatures ice stuff and all that and ocean or marine biome is pretty much just the ocean with seals , whales and marine life yk.