Newton wrote the mathematical concepts to prove the _____ shape of planet’s orbits.
triangular
circular
spherical
Circular
Newton researched planets and gravity
BOOM
robin is experimenting with an unknown solid. he discovers that the substance can dissolve in water. when this substance is a solid, it has a higher potential energy than when it is dissolved. what will happen during dissolution of this substance? responses the temperature of the surroundings will first increase, and then decrease.the temperature of the surroundings will first increase, and then decrease. , , the temperature of the surroundings will decrease.the temperature of the surroundings will decrease. , , the temperature of the surroundings will increase.the temperature of the surroundings will increase. , , the temperature of the surroundings will first decrease, and then increase.
The temperature of the surroundings will first increase, and then decrease because of the high potential energy that is present in the solid.
What is potential energy?Potential energy is defined as the stored energy that depends on the position of an object. For example, A spring has more potential energy when it's position can be changed i.e. compressed or stretched. Potential energy is the energy held by an object due to its position. Potential energy is the stored energy present in the matter. A force must be applied to an object in order to store potential energy. However, the energy that is stored in the mass of the object, another force like gravitational or elastic force must be present in the potential energy.
So we can conclude that option A is the correct answer.
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What is/are most susceptible to chemical weathering by dissolution?
Calcite is most susceptible to chemical weathering by dissolution, which make them unstable when exposed to surface circumstances.
Chemical weathering is caused by chemical modifications to minerals, which make them unstable when exposed to surface circumstances. The kind of alterations that occur are very particular to the mineral and the surrounding circumstances. Over 95% of the sedimentary rock known as limestone is typically composed of calcite.
Limestone can dissolve underground when there is acidic groundwater present. The calcite can be sufficiently removed by the disintegration over time to create caverns. All other things being equal, rocks with more mafic minerals would undergo weathering and erode faster than rocks with the other silicate minerals because the mafic minerals tend to break down into clay more quickly than most other silicate minerals.
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when cooking in the same pan and on the same burner setting, 250 ml (about 1 cup) of water will start to boil more quickly than 1 l (about 4 cups) of water. this is because
When cooking in the same pan and on the same burner setting, 250 ml (about 1 cup) of water will start to boil more quickly than 1 l (about 4 cups) of water. This is because 1 cup of water has a lower heat capacity than 4 cups.
The fact that it requires a lot of energy to heat water is one of its most important characteristics. To be precise, one calorie of heat must be absorbed by 4,184 Joules of water for one degree Celsius of temperature rise. To provide some context, 1 kilogram of copper can be heated to 1°C with just 385 Joules of heat.The quantity of heat needed to raise a mass unit of a substance's temperature by one degree is known as specific heat (C).The specific heat should be adjusted in accordance with the numbers and tables below when estimating mass and volume flow in a water heating system at higher temperatures.The specific heat is given at various temperatures (in degrees Celsius and Fahrenheit) and at water saturation pressure, which, in real-world applications, produces the same effect as atmospheric pressure at temperatures below 100 degrees Celsius (212 degrees Fahrenheit).Learn more about the Specific heat with the help of the given link:
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Sodium Sulfide Na2S is made by the following reaction Na2SO4(s)+4C(s) -> Na2S (s) +4CO (g). Consider a reaction mixture of 15.0g sodium sulfate and 7.50 g of carbon. What mass of Na2S is produced? Which reactant is the limiting reactant? Excess reactant?
The question gives us the reaction to produce sodium sulfide (Na2S) from sodium sulfate (Na2SO4) and carbon (C) and provides the amount of reactants used (15.0 g of Na2SO4 and 7.50 g of C), asking the limiting reactant, the excess reactant and the amount of Na2S produced.
[tex]Na_2SO_4\mleft(s\mright)+4C\mleft(s\mright)\to Na_2S(s)+4CO(g)[/tex]I) The first step for this type of question is checking if the given equation is balanced. For this case, we don't need to adjust the coefficients as the equation is already balanced.
II) Next, we need to calculate the molar mass of the compounds we'll be using. To calculate the molar mass, I'll be using the following atomic masses and considering the number of each atom in the molecules:
Na: 22.99 u
S: 32.07 u
O: 15.99 u
C: 12.01 u
Now, we can calculate the molar mass of Na2SO4, C and Na2S:
Na2SO4: molar mass = (2 * 22.99) + (1 * 32.07) + (4 * 15.99) = 142.01 g/mol
C: molar mass = (1 * 12.01) = 12.01 g/mol
Na2S: molar mass = (2 * 22.99) + (1 * 32.07) = 78.05 g/mol
iii) The third step is to convert the masses given for Na2SO4 and C into the correspondent number of moles using the molar mass of these compounds:
[tex]n=\frac{mass\text{ (g)}}{molar\text{ mass (g/mol)}}[/tex][tex]n_{Na2SO4}=\frac{15.0g}{142.01g/mol}=0.106\text{ mol}[/tex][tex]n_C=\frac{7.50g}{12.01}=0.624\text{ mol}[/tex]IV) On the forth step, we must define the limiting reactant for this reaction considering the amounts used of each one and the stoichiometric coefficients:
1 mol Na2SO4 reacts with 1 mol C
0.106 mol Na2SO4 reacts with...?
Solving this calculation, we have that we would need 0.106 mol of C to react with 15.0 g of Na2SO4. Since we there are 0.624 mol of C available to react, we can conclude that carbon is the reactant in excess (there is an excess of 0.518 mol) and sodium sulfate is the limiting reactant.
V) At last, we can calculate the amount of Na2S produced from the limiting reactant amount used (0.106 mol of Na2SO4) and the stoichiometric coefficients:
1 mol Na2SO4 ----------1 mol Na2S
0.106 mol Na2SO4 ---- y
Solving for y, we have that 0.106 mol of Na2S will be produced.
vWe can convert this amount into mass of Na2S using its molar mass:
[tex]n_{Na2S}=\frac{m}{M}\rightarrow m_{Na2S}=n_{Na2S}\times M_{Na2S}\rightarrow m=0.106\text{ mol }\times78.05\text{ g/mol = 8.27 g}[/tex]In summary:
Na2SO4 is the limiting reactant and there is an excess of 0.518 mol or 6.22 g of C;
8.27 g of Na2S will be produced from 15.0 g of Na2SO4.
Which of the following stretches tend to be the least intense?
a. O-H (alchohol)
b. O-H (carboxyllic acid)
c. C-H
d. C=O
e. C=C
The e. C=C stretch tends to be the least intense due to the lowest change in dipole moment.
In IR spectroscopy, the change in the dipole moment is the factor that has the greatest effect on the intensity of the stretch. The dipole moment for a certain bond is generally dictated by the difference in electronegativity of the bonded atoms - the larger the difference, the greater the dipole moment will be.
In the case of O-H bonds (whether in an alcohol or a carboxylic acid), as well as the C=O bond, there is a large difference between the very electronegative oxygen and the relatively small electronegativity of H and C. On the other hand, while the difference in electronegativity between H and C is small, it is still larger than 0, which is the difference in the C=C bond (unless there are electron-donating or -withdrawing groups attached to the olefine carbons), which makes the C-H stretch the more intense one.
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of the five elements sn, si, sb, o, te, which has the most endothermic reaction? (e represents an atom.) what name is given to the energy for the reaction?
E(g)E+(g)+e is the designation given to the reaction's energy.
Endothermic reactions: what are they?An endothermic reaction is what? Chemical reactions known to as thermally activated reactions take place when the reagents take in thermal energy from their environment and produce byproducts. These reactions produce a cooling effect by bringing the heat of the space around them down.
What is an example of an endothermic reaction?Respiration, evaporation fluids, ice melting, ice particles, alkane splitting, thermal degradation, ammonium chloride in water, and many other processes are examples of endothermic processes. Endo means "to absorb," and thermo means "heat," as the name suggests.
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7. Using Ideal Gas Law, calculate the total volume of a balloon that contains 2.00 moles of a gas
mixture at STP (0 °C and 1 atm)?
The total volume of a balloon that contains 2.00 moles of a gas mixture at STP is 44.8 L
It is given that
moles of gas = 2 moles
pressure of gas = 1 atm
temperature of gas = 0 °C = 273 K
According to ideal gas equation
PV = nRT
where P is the pressure, v is the volume, n is number of moles of gases, R is universal gas constant which has a value of R = 0.0820574 L•atm•mol-1K and T is the temperature
1 atm x V = 2 x 0.0820574 x 273
V = 44.8 L
Hence, total volume of a balloon is
44.8 L
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a solution of permanganate is standardized by titration with oxalic acid (h2c2o4). it require 28.97 ml of the permanganate solution to react completely with 0.1058g of oxalic acid. start off by writing a net ionic equation and balancing with the appropriate method. what is the molarity of the permanganate solution?
The ionic equation:
2Mn[tex]O^{- }_{4}[/tex] + 5 H2O4 + 6 [tex]H^{+}[/tex]⇄ 2[tex]Mn^{2+}[/tex] + 10 CO2 + 8H2O
Molarity of KMnO4 is 0.0229M
Molarity:
Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of the amount of substance per unit volume of solution.
Formation of the ionic equation:
2 × ( Mn[tex]O^{-}[/tex]4) + 8 [tex]H^{+}[/tex] + 5[tex]e^{-}[/tex] ⇄ [tex]Mn^{2+}[/tex] + 4 H2O )
5 × ( H2C2O4 ⇄ 2CO2 + 2[tex]H^{+}[/tex] + 2[tex]e^{-}[/tex] )
_______________________________________
2Mn[tex]O^{-} _{4}[/tex] + 5 H2C2O4 + 6[tex]H^{+}[/tex] ⇄ 2M[tex]n^{2+}[/tex] + 10 CO2 + 8 H2O
Now we have to find the molarity of the permanganate,
Volume = 28.97ml
mass = 0.1058g
molecular mass = 0.105 × 1000/ 28.97
= 3.62g
molecular mass = 158
Molarity of the solution = mass/ molecular mass
= 3.62/ 158
= 0.0229M
Therefore the ionic equation is 2Mn[tex]O^{- }_{4}[/tex] + 5 H2O4 + 6 [tex]H^{+}[/tex]⇄ 2[tex]Mn^{2+}[/tex] + 10 CO2 + 8H2O and the molarity of the permanganate solution is 0.0229M.
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a c3 plant absorbs a carbon radioisotope (as part of 14co2). in which compound does the labeled carbon appear first? which compound forms first if a c4 plant absorbs the same radioisotope?
A carbon radioisotope is absorbed by PGA oxaloacetate, a c3 plant (as part of 14co2). Which chemical, assuming a c4 plant absorbs the same radioisotope, has the tagged carbon first.
PGA oxaloacetate is oxaloacetic acid, sometimes referred to as oxalacetic acid or OAA, is an organic molecule that is crystalline in nature and has the chemical formula HO2CC(O)CH2CO2H. The conjugate base of oxaloacetic acid, oxaloacetate, is a metabolic intermediary in numerous mammalian functions. It is called PGA oxaloacetate.
Having the chemical symbol C and atomic number 6, carbon is an element with the meaning "coal" in Latin. It is nonmetallic and tetravalent, meaning that four of its atom's electrons can be used to create covalent chemical connections. The periodic table's group 14 is where it belongs. Is called carbon.
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Add a 2s sublevel orbital to your model by placing it on the 1s sublevel orbital Presently, you have two electrons in the 1s orbital. What is the maximum number of electrons for the 2s orbital?________ If an atom has three electrons, into which orbitals would they go?__________ This is the electron structure of what atom?_______
Answer: 3 or 4
Explanation:it would be air because it’s structurally atom is 3
a solution of salt water sits in the sun for 6 days.after 6 days, only salt remains Exsplain why this is an example of mixture?
Explanation:
beacuse they can be separeted by evaporation
A solution of salt water is a form of the mixture since salt can be
Using specifics, explain how vapour pressure occurs.
Vapour pressure is related to the evaporation and condensation of a liquid. Before we can explain what vapor pressure is, we need to first understand what evaporation and condensation mean.
All liquids have the tendency to evaporate and this evaporation occurs at the surface of a liquid. The liquid has an intermolecular force of attraction and when the kinetic energy of the liquid molecules overcomes this force of attraction, the molecules of the liquid began to escape to the surface. This is called evaporation.
Also in a closed container, the gas molecules possess random motion. During this motion, the molecules begin to collide with the wall of the container, lose energy, and then return back to the liquid. This is known as condensation.
This evaporation and condensation is a continuous process and equilibrium is reached after some time i.e the number of molecules leaving the liquid will be equal to the molecules leaving.
When equilibrium is reached between the liquid and the vapor, the pressure exerted on the surface of the liquid at this point is known as the VAPOR PRESSURE
For instance, ice changes state to form a liquid (water), and this water evaporates at 100 degrees Celcius to form a vapor. The pressure exerted by this water vapor on the surface of the water is the vapor pressure.
one of the by-products from internal combustion engines, where gasoline is burned in air, is nitrogen dioxide. as the exhaust of the engine passes through a catalytic converter, nitrogen and oxygen gases are re-formed. which equation best represents the balanced reaction for this process?
Answer: i donk know
Explanation:
An internal combustion engine's exhaust gas contains poisonous gases and other pollutants that a catalytic converter transforms into less-toxic pollutants by accelerating a redox process.
What is Catalytic converter?Typically used with internal combustion engines powered by gasoline or diesel, including lean-burn engines, catalytic converters are also occasionally used with kerosene heaters and stoves.
The American motor industry saw the first wide-scale introduction of catalytic converters.
Most gasoline-powered automobiles have catalytic converters as of the 1975 model year in order to abide by the U.S. Environmental Protection Agency's tighter regulations on exhaust emissions.
Therefore, An internal combustion engine's exhaust gas contains poisonous gases and other pollutants that a catalytic converter transforms into less-toxic pollutants by accelerating a redox process.
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Newton’s essay on _____ gained him attention in the mathematics community.
Principia
infinite series
reflecting telescopes
refracting telescopes
Answer:infinite series
Explanation:While working on his master’s degree, Newton continued to expand his ideas and wrote an essay on dealing with infinite series, but only shared the essay with his mentor Isaac Barrow.
A chemical reaction is necessary to separate the parts of a homogeneous
mixture.
true or false?
A mixture is made up of two or more different substances. A mixture can contain solids, liquids and/or gases. The components in a mixture are not chemically joined; they are just mixed. That means we do not need to use chemical reactions to separate them.
you need to make 700 ml of 5.0% (w/v) naoh solution. you have a bottle of 10.0% (w/v) naoh solution, which you must dilute to the correct concentration. what volume of the 10.0% solution should you use, and how much water must you add to it?
M1: Nook's necessary concentration is 5.0% (w/v).
V1 = final volume of solution, 400 mL
M2 = 10.0% (w/v) of the present NaOH concentration
V12 equals the initial volume of the solution.
Due to the fact that w/v% = weight of solute / volume of solution * 100
and the solute's mass will always be the same.
Mass of NaOH in solution is given by M1 X V1.
By the Mass Conservation Law: According to the law of conservation of mass or principle of mass conservation, any system that is closed to all transfers of matter and energy must maintain a constant mass over time since the system's mass cannot vary and neither more nor less amount can be added or subtracted.
M2 X V2 = M, X V1
M., M2, and 1/2's slow values in the equation above
500 x 400 ML = 10.0% x V2
V₂ = 200 mL
10.0 volume. utilized solution = 2.0 x 10 mL x 200 M L
Volume of goods added is calculated as [Y1 - V2 = 400-200=200ML = 2.0 = 2.0 x 102m/]
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What volume of a 1. 00 m stock solution of glucose must be used to make 500. 0 ml of a 1. 75×10−2 m glucose solution in water?.
The volume of Solution of glucose is 8.75 ml.
According to dilution law:
[tex]M_{1} V_{1} = M_{2} V_{2}[/tex]
where,
[tex]M_{1}[/tex] = molarity of stock solution = 1.00 M
[tex]V_{1}[/tex] = volume of stock solution =?
[tex]M_{2}[/tex] = molarity of glucose solution = 1.75×10−2
[tex]M_{2}[/tex] = volume of glucose solution = 500 ml
Applying all the given values to the above law gives the volume of the stock solution:
(1.00M) x [tex]V_{1}[/tex] = ( 1. 75×[tex]10^{2}[/tex]M) x (500ml)
[tex]V_{1}[/tex] = 8.75 ml
The volume of the 1.00 M stock solution is 8.75 mL of the required volume.
To determine the amount of stock solution required divide the number of moles of glucose by the molarity of the stock solution. A 1 M glucose stock solution can be prepared by dissolving 18 g of glucose in distilled/deionized water to a final volume of 100 ml. The total mass of a solution is the mass of the solvent plus the mass of the solute. Weigh the mass using a laboratory balance or convert the solvent volume to mass using the density formula D = m/V. Add the mass of the solute to the mass of the solvent to get the final volume.
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Which of the following is an isotope of carbon? (Atomic number 6)
A. 7 protons, 6 neutrons, 8 electrons
B. 7 protons, 8 neutrons, 6 electrons
C.8 protons, 6 neutrons, 7 electrons
D. 6 protons, 8 neutrons, 7 electrons
Answer:
it's A
Explanation:
100 on test5tttttttttttttttt
Why is reduced precipitation, rather than drought, the leading cause of limited water availability?
A)
Reduced precipitation is the cause of drought.
B)
Drought only impacts the supplies of groundwater.
C)
Water availability depends upon drought conditions.
D)
Drought only affects areas with vegetation.
E)
Precipitation limits the amount of water in many environments.
Answer:
A. Reduced precipitation is the cause of drought.
Explanation:
Reduced precipitation begins to insufficient water availability because water catch basins or tanks tend to dry out. When it drains out, people tend to start working and drying out the backup water sources and stored ones. Until such time, that the reservoirs of water will completely be dried out. And there will be no more water for them to use and there will be a drought.
hope this helps
Answer:
Option A
Explanation:
Precipitation generally refers to the source of water like rain ,snow If precipitation decreases the rain water coming decreasesWhich decreases the water level on earthThat's the main reason behind droughtHence option A is correctPredict the major organic product of the reaction of 2‑methyl‑1‑propene or 2‑methylprop‑1‑ene and water in sulfuric acid.
The major product of the hydration of 2‑methylprop‑1‑ene is found in the image attached to this answer.
What is the major product?One of the reactions that the alkenes undergo is the reaction that is called hydration. This has to do with the addition of the water molecule across the double bond of the alkene and this would lead to the production of an alcohol.
Recall that this addition occurs in such a way that the negative part of the addendum would be added to the carbon atom that has the least number of the hydrogen atoms thus the reaction is found to be regioselective.
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a solution was prepared by dissolving 35.0 gg of kclkcl in 225 gg of water. part a calculate the mass percent of kclkcl in the solution. express your answer with the appropriate units.
Mass percent of kcl in the solution is 12.45%
What is mass percent?
It's possible to express a degree using the mass percent. Additionally, it describes the element during a specific mixing. The mass percentage used to define the solution composition is common. It displays the amount of solute in a certain amount of solution. In terms of mass or moles, the number of solutes is indicated. We will learn the mass percent formula in this post along with several solved numerical problems.
(Component's mass minus Total Mass) times 100% Equals Mass Percentage or
(Solut's mass minus Solution's mass) times 100% equals the percentage of mass.
The mass percent formula is defined as the mass of each element in one mole of the compound, as well as the molar mass. With these masses, you can calculate each element's mass proportion.
Mass percent = mass of solute / mass of solution x 100
=32/32+225 x1000
=12.45%
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if the crucible is not heated enough, will the calculated value of water in the hydrate be erroneously low or high?
The final product will still contain some water well enough to for all the water to evaporate. Since not all of the water was driven off through heating, the mass of the evaporated water will be less than it should be.
Is evaporated water called steam?When heated, water expands and evaporates, becoming water vapor. At 100°C, it boils and then vanishes swiftly. Steam, an imperceptible gas, is produced at the full boil. The reverse of evaporation is condensation, which happens when water vapor condenses back into small droplets of water.
What happens to evaporated water?When a liquid evaporates, it transforms into a gas. During evaporation, molecules get enough thermal energy to separate from the liquid surface and reach the air as water vapor. After entirely separating from one another, water vapor molecules disperse and distribute among the other gas atoms in the atmosphere.
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IUPAC name for: CH₂CHICH₂CH3
which of the following does not represent a chemical reaction? a wood burning b fireworks exploding c ice melting d silver tarnishing
Carter is planning a backpacking trip in the mountains. To prepare for the trip, he has purchased the gear he needs and is planning his meals. He knows it will be cold in the evenings, and he would like a warm meal. Although it will cost more than using a camp stove to heat purified water from the trail and prepare dehydrated food, Carter is considering the use of self-heating containers. He evaluates containers that use the heating systems given in the table. Identify two potential constraints for the system Carter may choose, one based on the specific needs of the situation and one considering environmental impacts or costs. Develop criteria based on scientific understanding of energy transfer that can be used to evaluate potential solutions for his choice in system. Analyze the costs and benefits of using self-heating containers compared with using a camp stove.
Learn sensible suggestions for making plans and organizing a backpacking trip, The surroundings or situations in which an organism life is referred to as the environment.
The environment can be defined as a sum general of all of the dwelling and non-living factors and their consequences that affect human lifestyles. while all residing or biotic factors are animals, flora, forests, fisheries, and birds, non-living or abiotic elements include water, land, daylight, rocks, and air.
Environment is the whole lot that is round us. it may be living or nonliving things. It includes physical, chemical and different herbal forces. dwelling things stay in their surroundings.
All of the physical surroundings on earth are known as the environment. The surroundings include the whole lot residing and the whole thing nonliving. The nonliving part of the surroundings has 3 essential elements the ecosystem, the hydrosphere, and the lithosphere.
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How are helium atoms in this model different from helium atoms in real life?
Which of these phase changes involves a decrease in molecular motion?
O liquid changing to solid
O solid changing to liquid
Osolid changing to gas
O liquid changing to gas
Option A is correct which says when a liquid changes into a solid, the molecular motion decreases.
What is molecular motion?
The movement of its component atoms or molecules in a certain direction is referred to as molecular motion.
There is a decrease in the molecular motion when liquid moves towards a solid state. This is because the kinetic energy of the molecules decreases as molecules are moving from a less uniform space to a more uniform phase. As a result, molecular motion decreases.
Hence, option A is correct
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What trend does the first ionization energy follow, going across the periodic table?
The first ionization energy increases across a period and decreases down the group.
What is ionization energy ?
Ionization energy is defined as the minimum amount of energy required to remove an electron which is loosely held in the outermost shell to form an isolated gaseous atom,ion or molecule.
It has a positive value for neutral atoms indicating that the ionization process is an endothermic process . The closer the outermost shell electrons are to the nucleus of an atom higher is it's ionization energy.It is expressed in electron volts or joules.
Ionization energy increases across period as more energy is required to remove electron from an atom as it is closely held along a period while it is decreasing down the group as on going the group the inter-nuclear distance increases and as a result less energy is required to remove an electron.
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determine the density of each metal. Show all your work and include appropriate units (rise over run)
