Answer:
Atom, cell, dust particle, ant, ping pong ball
Explanation:
Firstly, atoms make up all matter, including each of the items on that list. The only things smaller than atoms are the parts of the atom itself, protons, neutrons and electrons. Because none of those are on that list, atoms have to be the smallest. Next smallest is the cell. Cells are made up of atoms, but they also in part make up dust. You can see a dust particle with the naked eye, but in order to see a cell you must use a microscope. Thus, cells are smaller than dust particles. Next is an ant. Obviously, an ant is bigger than a speck of dust, and is made up of cells and atoms. Lastly all you have is the ping pong ball, which is much larger than the rest of the items. Hope this helps!
All matter, including each thing on the list, is made up of atoms. The protons, neutrons, and electrons that make up an atom are the only particles smaller than atoms.
Thus, Atoms must be the tiniest object because none of those are included in that list. The cell is the next smallest. Atoms make up cells, but dust also makes up a portion of them.
A dust particle can be seen with the unaided eye, but a microscope is required to see a cell.
Cells are hence smaller than dust particles. An ant comes next. Of course, an ant is composed of cells and atoms and is larger than a particle of dust.
Thus, All matter, including each thing on the list, is made up of atoms. The protons, neutrons, and electrons that make up an atom are the only particles smaller than atoms.
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If 276 g of dinitrogen tetroxide and 64.0 g of hydrazine are mixed, how many grams of nitrogen gas can you produce?
Answer:
84 g of N₂
Explanation:
We begin from the reaction:
N₂O₄ + 2N₂H₄ → 3N₂ + 4H₂O
1st step: Find out the limiting reactant.
We convert the mass to moles.
276 g . 1mol/ 92g = 3 moles of N₂O₄
64 g . 1mol / 32g = 2 moles of hidrazine
Limiting reactant is the hydrazine. Ratio is 1:2, then for 3 moles of tetroixde I may need 6 moles of N₂H₄. (But I only have 2).
To determine the grams of produced nitrogen we see stoichiometry (2:3)
2 moles of hydrazine can produce 3 moles of N₂
Definetaly our 2 moles make 3 moles of gas.
We convert the moles to mass.
3 mol . 28g /1mol = 84 g of N₂
Why is systems thinking important?
Systems thinking ignores the details of a system and just looks at its overall function.
Systems thinking ranks the parts of a system in terms of most important to least.
Systems thinking allows us to understand all the parts that make up the whole system.
Systems thinking examines how a system affects human life.
Answer:
Systems thinking allows us to understand all the parts that make up the whole system.
Explanation:
Just took the test
The systems thinking important because, Systems thinking allows us to understand all the parts that make up the whole system. Therefore, option C is correct.
What system thinking ?By considering the world's complexity in terms of links and entire rather than breaking it down into its component components, systems thinking helps us make sense of how complicated the world is. It has been applied as a method for investigating and producing efficient action in challenging situations.
By using a deeper grasp of the surrounding structure and its constituent parts rather than relying just on previous events, systems thinking gives a technique to more accurately forecast future outcomes.
Systems thinking is a discipline in management that focuses on understanding a system by looking at the connections and interactions between the different parts that make up the entire of that defined system. The concept of the "entire system" is a way of looking at an entire organization in relation to its surroundings.
Thus, option C is correct.
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When silver nitrate (AgNO3) dissolves in water, the temperature of the solution decreases.
Explain your answer
Answer:
The enthalpy of solution for AgNO3 is positive because the temperature of the solution decreases (the dissolution is endothermic). Hsol = Hsolute + Hsolvent + HmixHsolute and Hsolvent are endothermic because energy is required to overcome intermolecular forces and separate solute and solvent particles.
Answer:
the enthalpy of solution for agno3 is positive because the temperature of the solution decreases. (the dissolution is endothermic.)
Delta H sol=delta HSolute +delta H solvent +delta H mix
HSolute and H solvent are endothermic because energy is required to overcome intermolecular forces and separate solute and solvent particles.
H mix is exothermic because energy is released when intermolecular forces form between solute and solvent particles.
if the overall enthalpy of solution is positive, then HSolute + H solvent must be larger in magnitude than H mix.
Explanation:
correct on edge2021
Hey I'm Chloe,
Does anyone know How many sides and Octagon has?
I Tried Researching it but Nothing came up.
Which phrase best describes the water cycle?
The physical processes that move water through the atmosphere
The interconnected, continuous processes that move water through Earth's spheres
Water changing from liquid to gas and back to liquid
The chemical components that make up water
Answer:
I think option B , bcz it is continuous process
The continuous, interconnected processes that move water through Earth's spheres best describe the water cycle. Therefore, option B is correct.
What is the water cycle?The water cycle can be demonstrated as the continuous movement of water from the Earth's surface to clouds and from clouds to the back surface. The sun, air, and other factors are included in the physical process of the water cycle, water goes through each of the states of matter such as solid, liquid, as well as gas.
The water cycle is a combination of the physical processes where water evaporates from the earth's surface into the atmosphere, cools down, condenses produces rain in clouds, and again comes back to the surface of the earth with the precipitation process.
Water on the Earth's surface of the water after rain gets collected in the form of rivers, groundwater, ponds, etc., and combines in oceans and gets evaporated.
The evaporation process includes the exchange of water from the surface in the form of water vapors to the atmosphere. The process of evaporation cools the temperature of the atmosphere as the sunlight on the surface of the earth makes the warm.
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Which statement is best illustrated in the diagram above regarding how the Sun's energy affects the Earth's surface from June through September in the Northern Hemisphere? The season changes from autumn to winter, daylight hours decrease, and infrared radiation is the weakest during the June solstice. B The season changes from winter to spring, daylight hours increase, and infrared radiation is the weakest during the September equinox. C The season changes from summer to autumn, daylight hours decrease, and infrared radiation is the strongest during the June solstice. The season changes from spring to summer, daylight hours increase, and infrared radiation is the strongest during the September equinox.
Answer:
I'm sorry but there is no diagram above.
What is the correct IUPAC name for CuNO₃?
Answer:
Copper(i) nitrate
Explanation:
That is the correct name.
Answer:
Molecular Formula
Explanation:
Petroleum is a mixture of many alkanes. The alkanes are separated and purified at oil refineries. What process decribes what happens in an oil refinery?
Answer:
Fractional distillation
Explanation:
The process of separating petroleum products into its fractions is called fractional distillation.
Fractional distillation is a method of separating a mixture of substances based on the differences in their boiling points.
Petroleum is a mixture of hydrocarbons separated in a large fractionation tower having many trays maintained at different temperatures.
As the vapor containing the petroleum mixture ascends the fractionation tower, the mixture is separated at each tray to yield the various fractions of petroleum.
what best describe the process of percipitation in the water cycle
Answer:
Precipitation is water released from clouds in the form of rain, freezing rain, sleet, snow, or hail. It is the primary connection in the water cycle that provides for the delivery of atmospheric water to the Earth. Most precipitation falls as rain.
Explanation:
Does anybody know how to find the theoretical yield? you can just do 1 equation
Answer:
its the first part in mass of sodium
Explanation:
:)
Which of the following is true? Electrons are shared in ionic bonding
Answer:
The two most basic types of bonds are characterized as either ionic or covalent. In ionic bonding, atoms transfer electrons to each other. ... In contrast, atoms with the same electronegativity share electrons in covalent bonds, because neither atom preferentially attracts or repels the shared electrons.
Explanation:
Which of the following is a limitation of using a model to study a natural event?
A.
The results of a model event are often much more accurate than those of the actual event.
B.
The model and the results it generates will have no relation at all to the actual event.
C.
The size and design of the model will be too similar to the actual event.
D.
The results of a model event may not be similar enough to the results of the actual event.
Answer:
D
Explanation:
why i say that is because take for example a volcano, when you make a model, you'll see what takes place in a real eruption but in real life the lava would burn things in its path, the model volcano may not. That's just an example
Answer:
D
Explanation:
I got it right on study island
The breaking down or wearing away of rock and soil is known as... A. earthquake
B. global shift C. weathering D. deposition
Answer:
the breaking down of rock is known as weathering
What is the acceleration due to gravity at Earth's surface?
Answer:
9.8 m/s2
Explanation:
That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2.
Calculate the number of molecules in 64.5 grams of Nitrogen monoxide, NO
N=9.933
Explanation:
no of mole = m÷mr
then ,no of molecules=n×la
empirical formula of c8h14
Answer:
C4H7
Explanation:
Empirical formula is defined as the simplest ratios of atoms present in the compound.
The empirical formula for C8H14 is C4H7 as if you multiply each coefficient of C4H7 by 2, it will become C8H14. The chemical name of C8H14 or C4H7 is 1-Methylcycloheptene.
Hence, the correct answer is "C4H7".
describe nuclear change please
Answer: Nuclear change is distinct from chemical change in that elements change. In the nuclear change the elements can change from one to another. (Nuclei can break apart to form smaller elements.)
Explanation:
Answer:
A nuclear change is a process by which nuclei of certain isotopes change spontaneously or are forced to change to two or more different isotopes.
Explanation:
The three main types of nuclear change in the matter are radioactive natural disintegration, nuclear fission, and nuclear fusion.
I like blowing up stuff too
What is the name of this molecule?
O A. 1-methylpentane
O B. 1-pentyne
C. cis-1-pentene
O D. Pentane
Answer:
The name of that molecule should be 1-pentyne
so your answr should be B
Explanation:
Molecules are species made up of atoms. The given molecule in the figure is 1-pentyne. Thus, option B is correct.
What is 1-pentyne?1-Pentyne is a chemical compound with the formula C₅H₈, and an internal alkyne group between the first and the second carbon atom.
The molecules consist of twelve bonds including the bonds between the carbon-carbon, and carbon-hydrogen. There is one triple or the alkyne bond present and five carbon hence the name of the molecule is 1-Pentyne.
Therefore, the molecule is option b. 1-Pentyne.
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if you have 3.4 grams of carbon how many moles of carbon would you have
According to the enthalpy diagram below, which of the following statements is true?
Arrows A and D represent the enthalpy of the intermediate chemical reactions.
Arrow C represents the enthalpy of the overall chemical reaction.
Arrow C indicates that the third intermediate reaction is exothermic.
Arrow B indicates that the second intermediate reaction is exothermic.
According to the enthalpy diagram true statement is that Arrow C indicates that third intermediate reaction is exothermic in nature.
What is enthalpy of reaction?Enthalpy of the reaction gives idea about the exchange of heat during the whole chemical reaction process.
Arrow A and Arrow B represents that first and second intermediate reaction is endothermic.Arrow C indicates that third intermediate reaction is exothermic in nature.Hence Arrow C indicates that the third intermediate reaction is exothermic is true statement.
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Answer: c
Explanation:
Balance the equation:
Answer:
3SiO2 + 2CaC2 ------> 3Si + 2CaO + 2CO2
Explanation:
1.0 mol of ethanol and 1.0 mol of acetic acid are dissolved in water and kept at 100 °C. The volume of the solution is 250 mL. At equilibrium, 0.25 mol of acetic acid has been consumed in producing ethyl acetate. Calculate Kc at 100 °C for the reaction C2H5OH(aq) + CH3CO2H(aq) CH3CO2C2H5(aq) + H2O(l)
Answer:
Kc = 0.333
Explanation:
First of all we state the equilibrium reaction:
C₂H₅OH(aq) + CH₃CO₂H(aq) ⇄ CH₃CO₂C₂H₅(aq) + H₂O(l)
Initially we start with 1 mol of alcohol and 1 mol of acid. After the reaction goes complete, 0.25 moles of acid have been consumed. As ratio is 1:1, we also consumed 0.25 moles of alcohol. Then, in the product side we finally produced 0.25 moles of water and 0.25 moles of ethyl acetate.
How many moles are available in the reactant side, after the equilibrium?
1 mol - 0.25 moles (that have been reacted) = 0.75 moles.
To determine Kc, we need molar concentrations, so let's see M in products and reactants:
0.75 mol / 0.25 L = 3 M
0.25 mol / 0.25 L = 1 M
We needed to convert 0.250 mL to L → 0.250 mL . 1L/ 1000mL = 0.250 L
Let's determine expression for Kc:
Kc = [H₂O] . [CH₃CO₂C₂H₅] / [C₂H₅OH] . [CH₃CO₂H]
1 . 1 / 3 . 3 = 1/9 → 0.333
A chemist analyzes two samples. One sample contains 14g of element x and 6.0 g of element y. The second sample contains 28 g of element x and samples are the same substance
Answer:
Explanation:
Here's the complete question:
A chemist analyzes two samples.One sample contains 14g of element x and 6.0g of element y.The second sample contains 28g of element x and 6.0g of element y. Does it appear that the two samples are the same substance?
The two samples that we are given in the question are different. They are not the same thing because we can deduce that their components ratio are different.
Sample One contains 14g of element x and 6.0g of element y. The ratio of element x to y is 14/6 = 7/3 = 7:3.
Sample Two contains 28g of element x and 6.0g of element y. The ratio of element x to y is 28/6 = 14/3 = 14:3.
Therefore, they have different ratio for their components and are therefore not thesame.
A sample of Oxygen gas is in a cylinder at constant temperature. What would happen to the pressure of the gas if the volume was
smooshed down to half its original size? Decreasing the volume by a factor of 2.
Answer:
This means that the pressure would become double of it's initial pressure.
Explanation:
Key statements:
- Constant temperature
- What happens to the pressure of the gas if the volume was
smooshed down to half its original size?
Basically the question is asking about the relationship between pressure and volume at constant temperature. This is given by Boyle's law.
Boyle's law states that the volume of a fixed mass of gas is inversely proportional to it's volume at a fixed temperature.
This is given by;
P1V1 = P2V2
Where;
P1 = Initial pressure
P2 = Final pressure
V1 = Initial Volume
V2 = Final Volume
From the question;
V2 = V1/2
Inserting it into the equation;
P1 V1 = P2 V1/2
Divide all through by V1
P1 = P2 /2
P2 = 2 P1
This means that the pressure would become double of it's initial pressure.
Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below.
The question is incomplete, The complete question is;
Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below. What experimental evidence led to the development of this atomic model from the one before it?
Answer:
A few of the positive particles aimed at a gold foil seemed to bounce back.
Explanation:
This model of the atom was proposed by Ernest Rutherford and was called the planetary model of the atom.
This model is based on an experiment using a gold foil on which alpha particles were focused. Most of the alpha particles passed through the foil. Some of the alpha particles were scattered at large angles and a few seemed to bounce back.
This led to the conclusion that the atom has a massive positive core around which electrons move as planets move around the sun.
Answer:
It is A
Explanation:
In general, what causes a sea breeze?
O
A. The difference in density between land and water
B. The difference in cloud cover between land and water
Ο Ο Ο
C. The difference in specific heat capacity between land and water
D. The difference in elevation between land and water
Answer:
The usual cause of sea breeze is the difference in specific heat capacity between land and water Land heats and cools more quickly than water. What is the cause of a sea breeze? The air over the land is warmed and rises, to a greater temperature than that over the sea.
Explanation:
Your answer is C ! <3
The difference in specific heat capacity between land and water is the cause of sea breeze.
What is sea breeze?land and ocean heat up at different rates, sea breezes often occur during hot, summer days. The land surface warms up more quickly than the water surface during the day. As a result, the air above land is warmer than that over water.
Just to refresh your memory, warmer air is lighter than cooler air. Warm air rises as a result. As a result, the warmer air above the ground is rising. The cooler air above the water is moving across the surface of the land to replace the rising heated air as it rises over the land.
This is the sea breeze, which is seen at the top of the next picture. The land breeze that happens is seen at the bottom of the following picture.
Therefore, The difference in specific heat capacity between land and water is the cause of sea breeze.
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At what power of ten does the entire solar system come into view
Answer: 10,000,000,000 kilometers
Explanation:
All the planets in our solar system come into view. But at this distance, only Jupiter and Saturn would be visible with the naked eye.
You start with 2.5g of magnesium and add it to 400mL of CO2 at 23 o C and 1atm. How many grams of magnesium oxide will be formed?
Answer:
0.664 g are formed by the reaction.
Explanation:
First of all, we determine the reaction:
Mg + CO₂ → MgO + CO
We need to determine the moles of the CO₂ by the Ideal Gases Law.
We convert to L, the volume → 400 mL = 0.4L
T° → 23°C + 273 = 296K
P . V = n . R .T
n = P . V / R .T
n = (1 atm . 0.4L) / (0.082 . 296K) → 0.0165 moles
Moles of Mg → 2.5 g . 1mol / 24.3g = 0.103 moles
As ratio is 1:1, CO₂ is the limiting reactant.
For 1 mol of Mg, we need 1 mol of gas
Then, for 0.103 moles of Mg, we need 0.103 moles of gas, but we only have 0.0165 moles.
If we see the product side, ratio is also 1:1
0.0165 moles of CO₂ must produce 0.0165 moles of MgO.
We convert the moles to mass → 0.0165 mol . 40.3 g /1mol = 0.664 g
Katrina inserts a key into her car’s ignition. She turns the key, putting her car into ignition mode. In this mode, some energy is used to increase the temperature of the car’s fuel. This energy allows the fuel to combust and the car to move. What’s this energy called?
A.
absorbed energy
B.
activation energy
C.
chemical energy
D.
released energy
E.
solar energy
Answer:
B
Explanation:
Answer:
the correct answer is B
Explanation:
Most of the mass of an atom is found in
Answer:
Most of the mass of an atom is found in the nucleus.
Explanation: