The structure of the rock deep underground determined by some theory by the scientists.
The majority of scientists think that rocks and minerals' constituent constituents are what cause layers to form. Rocks and minerals can "change state," or melt or crystallize to produce other rocks, at certain pressures and temperatures.Different kinds of rocks "reflect" both body waves in various ways. This enables seismologists to distinguish between various rocks that are found deep inside the Earth's crust and mantle. For instance, deep underground oil resources can be found using seismic reflections.The following reasons are how we can explain why some mountains grow:Because of mountain erosion, the crust loses mass, raising the mountains.The balance between the mountains' vast weight and their buoyancy in the mantle is one of the factors influencing the height of the range.The following reasons are how we can explain why some mountains move:A process known as small scale convection occurs when mantle material sinks at a plate boundary and then flows upward farther away, pushing on the crust. Mountains can be moved by the slow but unstoppable movements, both gradually and through earthquakes or eruptions.To learn more about growing mountains visit:
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What is the difference in the atomic models of J.J Thomson and Rutherford??
Answer:
Rutherford proved J.J is wrong.
Explanation:
The Plum Pudding Model which was put forth by J.J Thompson stated that atoms are tiny particles of positively charged particles, with tiny negative charged particles stuck inside.
When Rutherford did the goldfoil experiment, he concluded that electrons (the negatively charged particles) actually revolve around the nucleas.
what's the nucleas?
So this too, was put forth by Rutherford that there is a centre of positive charges in an atom called nucleas it consists of protons and neutrons
hence, Rutherford proved that Plum Pudding Model was wrong.
hope I helped you :)
1. How many doliars are in 45 pesos?
Answer:
2.21
Explanation:
3.
What is the oxidation number of oxygen (O) in O2?
0
+2
−2
+4
Which statement best describes a benefit of conducting a comparative investigation over collecting data from the Internet? A comparative investigation can be repeated in a short time while collecting the continuous data from the Internet takes longer. Conducting a comparative investigation is always less expensive than an investigation in which data is obtained from the Internet. Conducting a comparative investigation is always less time consuming than obtaining data from the Internet. A comparative investigation can provide a wider range of data than can be obtained from the Internet.
Conducting a comparative investigation is always less expensive than an investigation in which data is obtained from the Internet.
Information theory and efforts to construct and connect computer networks that were the result of American research and development and international collaboration, particularly with scholars in the United Kingdom and France, are at the root of the history of the Internet.
In the late 1950s, The Internet field of computer science was just beginning to take time-sharing among computer users into account. Later, Internet explored if this could be done across wide area networks. Independently, Donald Davies developed packet switching at the National Physical Laboratory (NPL) in 1965 and proposed a national commercial data network in the UK. Paul Baran proposed a dispersed network based on data in message blocks in the early 1960s.
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What similarities and differences can you identify between neon signs and fireworks?
The fireworks are colorful and neon signs are orange in color.
What is the difference between neon signs and fireworks?When a firework is fired, the atoms of the various chemical compounds inside it absorb energy.
When the electrons return to lower energy levels, they emit colored light.
Various colors can be produced depending on the chemical employed. In glass tubes filled with neon, gas is neon lights or signage.
When the lamp is plugged in, the electrical energy causes the neon electrons to leap to higher energy levels; when they go to lower levels, colorful light is given out.
The neon never runs out, which is neat. Electrical energy is the sole resource that is consumed.
Since they are not destroyed, the electrons can be employed repeatedly to advance through levels.
The orange light that neon emits is visible.
Even while neon signs often glow in orange light, there are many other hues that can be used.
The changes occur when other gases, such as argon or krypton, or painting the tube to generate a specific hue when lit, are used instead of neon.
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Nitric acid is a component of acid rain that forms when gaseous nitrogen dioxide pollutant reacts with gaseous oxygen and liquid water to form aqueous nitric acid. True or false?.
Answer:
true.nitric acid reacts with those chemicals to form aqueous nitric acid
Which statement is true about the environment
of most of Earth?
(1) It is usually greatly unbalanced.
(2) It is usually in equilibrium and hard
to change.
(3) It is usually in equilibrium but easy to change
on a small scale.
(4) It is normally heavily polluted by natural
occurrences.
The statement true about the environment of most of the earth is that it usually in equilibrium but easy to change on a small scale.
The balance between the energy flowing in from the Sun and the energy leaving the Earth is known as the earth-atmosphere energy balance. Both shortwave and ultraviolet energy are emitted when the Sun releases energy. When it gets to the Earth, some of it is absorbed by the atmosphere, some is reflected back to space by clouds, and some is absorbed at the surface of the planet.The global energy balance is particularly dependent on the absorption of infrared radiation that the Earth is trying to send back into space.The moon, which has no atmosphere, has an average surface temperature of 0°F (-18°C). The average surface temperature of the Earth is 59°F (15°C), in comparison. This effect is called green house effect.This Equilibrium of Earth and atmosphere can change with variation in green house gases.Therefore, Option 3 is correct statement
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How does a balanced chemical equation satisfy the Law of Conservation of Mass?
The balanced equation always obey the law of conservation of mass.
As the balanced equations have equal number of atoms in both that is reactants and product side.that means the number of atoms on both the sides are equal before or after the reaction.for example an unbalanced equationN2 + H2 = NH3here before the reaction, the number of atoms of nitrogen is 2 but after the reaction the number of atom of nitrogen is 1.Same , The number of atom of hydrogen is 2 and after the reaction the number of atoms of hydron is 3.Change in the atomic number causes the change in the mass of the element. hence in this equation the mass is not conserved.SO, for the conservation of the mass , the number of atoms should be equal in both the side.for example , for balanced equationN2 + 3H2 = 2NH3Here the number of atoms of nitrogen is 2 in both the sides.The number of atoms of hydrogen is 6 in both the sides.since the number of atoms are same in both the sides of the reactions then the mass of the elements/ compound is also same.
Hence the mass is conserved in balanced equation.
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Please help with this question ignore the highlighted choice all I know is that it's not C or the 3rd one
Will give brainliest and 20 points!
calculate the number of moles of the indicated substance in each of the following samples.
a. 49.2 mg of sulfur trioxide 6.14 x 10-4 mol so3
b. 7.44 x 104 kg of lead(iv) oxide
c. 59.1 g of chloroform, chcl3
d. 3.27 mg of trichloroethane, c2h3cl3
e. 4.01 g of lithium hydroxide
The number of moles of indicated substance in each sample is -
a) 6.14 x 10⁻⁴ mol
b) 3.1 x 10⁵ mol
c) 0.4 mol
d) 2.45 mol
e) 0.16 mol
To calculate number of moles of each substance in sample -
a) Sulfur trioxide
Given mass = 49.2 mg = 0.0492 g
Molar mass = 80.06 g/mol
Number of moles of sulfur trioxide = Given mass
Molar mass
= 0.0492g = 6.14 x 10⁻⁴mol
80.06 g/mol
b) Lead(iv) oxide
Given mass = 7.44 x 10⁴ kg = 7.44 x 10⁷ g
Molar mass = 239.2 g/mol
Number of moles of lead(iv)oxide = Given mass
Molar mass
= 7.44 x 10⁷g = 3.1 x 10⁵mol
239.2 g/mol
c) Chloroform (CHCl₃)
Given mass =59.1 g
Molar mass = 119.38 g/mol
Number of moles of chloroform = Given mass
Molar mass
= 59.1 g = 0.4 mol
119.38 g/mol
d) Trichloroethane (C₂H₃Cl₃)
Given mass = 3.27 mg = 0.00327 g
Molar mass = 133.4 g/mol
Number of moles of trichloroethane = Given mass
Molar mass
= 0.00327 g = 2.45 mol
133.4 g/mol
e) Lithium hydroxide
Given mass = 4.01 g
Molar mass = 23.95 g/mol
Number of moles of Lithium hydroxide = Given mass
Molar mass
= 4.01 g = 0.16 mol
23.95 g/mol
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Fe + O2 → Fe203
What should the coefficient for the diatomic oxygen
(O₂) be when this equation is correctly balanced?
Describe one way that electromagnetism can be observed.
Answer:
It is observed in various ways;
- Through electromagnetic waves:
Gamma rays, x-rays, ultraviolet rays and visible light are all electromagnetic.
- In electromagnetic devices
For example in motors and generator.
I'll describe that in a motor
Description;
When electric current is applied to the hair coils of the motor, it moves in direction according to Flemings hand rule.Through laws of induction, and emf is induced in a coil hence producing magnetic fields which move the coil continuously .[tex].[/tex]
Explain two events: (1) placing a hot
pack on your skin and making your skin feel warmer, and (2) placing a cold pack
on your skin and making your skin feel colder
If more solute is added to a solvent, more than is able to dissolve at a given temperature, a(n)?
If more solute is added to a solvent, more than is able to dissolve at a given temperature, a(n) equilibrium will be established between dissolved and undissolved solute.
What is an equilibrium ?A condition of an item known as equilibrium is one in which two or more opposing forces, whether internal, external, or a combination of both, act on it and cancel one another out to maintain the object in the same state as before. The Latin word libra, which meaning weight or balance, is the word's etymological ancestor.
Here are a few instances of equilibrium:
A book that is open and at resta vehicle which is driving at a steady speeda chemical process where the rates of the forward and reverse reactions are equalLearn more about equilibrium
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A nitrogen oxide contains 30. 45% n mass. If the molar mass of the compound is 90. ± 5 g/mol, what is its molecular formula?.
[tex]N_{(1*2)} O_{(2*2)} = N_{2} O_{4}[/tex] this is the molecular formula.
How do you locate the molecular formula?Divide the compound's molar mass by the empirical formula molar mass. The outcome should be a whole number or very close to one. Multiply the whole number found in step 2 by all the subscripts in the empirical formula. The molecular formula is the end result.An empirical formula is the simplest whole-number ratio of the various atoms in a compound. The molecular formula specifies the number of different types of atoms present in a compound molecule.With the given molar mass or the molecular formula mass, we can get the whole-number multiple for the compound.Whole-number multiple =[tex]\frac{90 g/mol}{46.01 g/mol}[/tex] ≈ 2
Multiplying the subscripts of [tex]N_{1} O_{2}[/tex] by 2, the molecular formula is
[tex]N_{(1*2)} O_{(2*2)} = N_{2} O_{4}[/tex]
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This gaseous element has 5 valence electrons and few
sodium.
The gaseous element having 5 valence electrons and fewer neutrons than sodium is Nitrogen.
Nitrogen has the atomic number 7, and it is represented by the symbol 'N'. Nitrogen is a nonmetallic compound and is light in weight. It is found in abundance in the atmosphere. Nitrogen usually exists in oxidation states of -3, +3, and +5. It has five valence electrons, 7 protons, and 7 neutrons, while the number of protons and neutrons in Sodium having atomic number 11 are 11 and 12 respectively. The atomic configuration of nitrogen is 1s², 2s², and 2p³. Valence electrons may be defined as the number of electrons that can be lost or gained by an atom to achieve the configuration of noble or inert gases.
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Help! I'm timed!
Xian drew a diagram to compare deletion mutations and substitution mutations.
Which label belongs in the area marked "X"?
∆ may change the type of amino acid
∆ decreases the number of bases in the sequence
∆ does not change the type of amino acid
∆ increases the number of bases in the sequence
Decrease the number of bases in the sequence will fall under the category of deletion mutation.
When a portion of a DNA molecule is not replicated during DNA synthesis, a deletion mutation happens. This uncopied region can range in size from a single nucleotide to an entire chromosome. If this DNA is lost during replication, a hereditary disorder may result.Loss of any number of nucleotides, from a single nucleotide to an entire section of a chromosome, can occur during deletion mutation.In terms of genomics, substitution is a sort of mutation where one nucleotide is changed for a different nucleotide. The phrase can also be used to describe switching out one amino acid for another in a protein.Three different kinds of substitution mutations exist: Nonsense. Missense. Silent.Therefore, Decrease the number of bases in the sequence is deletion mutation.
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letes Use this figure to answer the following questions. est 5 cm - 5 cm 5 cm 7 Apply What is the surface area-to-volume ratio of this cube? 150
Answer:
5cm is the answer because 5-5 is o and the one 5 is remaining so 5 is the answer.
Classify each of the following compounds as an acid, base, or both. be sure to answer all parts.
a. ch3ch2oh (select)
b. ch3ch2ch2ch3 (select)
c. ch3co2ch3 (select)
Thus, we can conclude that following compounds are classified as follows.
[tex]CH_3CH_2OH[/tex] - can be both acid and base
[tex]CH_3CH_2CH_2CH_3[/tex] - very weak acid
[tex]CH_3CO_2CH_3[/tex] - can be both acid and base
ExplanationAccording to Bronsted-Lowry an acid is defined as the specie which is able to donate hydrogen ions when dissolved in water.
On the other hand, bases are the species which are able to donate hydroxide ions when dissolved in water.
A specie which is able to accept a hydrogen atom and also able to donate a hydroxide ion will act as both acid and a base.
For example, [tex]CH_3CH_2OH[/tex] is able to donate a hydroxide ion and simultaneously can accept a hydrogen ion.
In [tex]CH_3CH_2CH_2CH_3[/tex] , the hydrogen atoms are strongly held together by the carbon atoms due to the small electronegativity difference between carbon and hydrogen atom. Hence, it will be a weak acid.
On the other hand, [tex]CH_3CO_2CH_3[/tex] can loose a hydrogen atom or it can also gain a hydroxyl group. This is due to the electronegativity difference between oxygen and hydrogen atom.
Therefore:
[tex]CH_3CH_2OH[/tex] - can be both acid and base
[tex]CH_3CH_2CH_2CH_3[/tex] - very weak acid
[tex]CH_3CO_2CH_3[/tex] - can be both acid and base
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Hydrochloric acid + Copper carbonate --> ___+___+___
The complete reaction is Hydrochloric acid + Copper carbonate = calcium chloride +carbon dioxide + water
This reaction is an example for decomposition reaction. A chemical breaking down into two or more simpler compounds is known as a decomposition process. A decomposition reaction has the general form AB ———- A+B. The majority of decomposition processes demand an energy input in the form of heat, light, or electricity. three types Reaction to thermal decomposition. Heat-induced chemical reaction when one material splits into two or more compounds.
Reaction of electrolytic decomposition.
Decomposition by sunlight
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Calcium chloride, carbon dioxide, and water are the end products of the whole reaction between hydrochloric acid and copper carbonate.
An illustration of a decomposition reaction is this one. A decomposition process is when a substance breaks down into two or more simpler components. The general form of a decomposition reaction is AB = A+B. Most decomposition processes require the addition of energy in the form of heat, light, or electricity. three kinds in response of decomposition chemical reaction brought on by heat , light and electricity when one substance divides into two or more compounds.When a compound's aqueous solution is exposed to an electric current, electrolytic breakdown occurs. When water is exposed to electrical energy from a battery, the water separates into the diatomic molecules of hydrogen and oxygen.Heat is a reactant in the chemical reaction known as thermal breakdown. These reactions are endothermic, which means that thermal energy is needed to break the chemical bonds between the molecules since heat is a reactant in the reaction.Photolytic decomposition is a term used to describe a type of breakdown reaction when energy is given in the form of light.There are three ways through which we can decomposed the compound into simpler substance.
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the criterion for whether a reaction proceeds spontaneously is delta g not delta g not, because delta g takes into account the concentrations of the substrates and products
Yes this statement is true because the concentration is two help determine whether the reaction is moving forward or backwards direction
Here it is at standard condition and delta g not is always the same because it denote that the reactant/product are at standard temperature or product as the reaction goes toward equilibrium delta g change because reaction is proceeding forward and delta g not is standard change in free energy between reactant and product. delta g is used to find gibbs free energy in nonstandard conditions while delta g naught is used to determine gibbs free chemical reaction energy under normal conditions. that's why this statement is true.
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Suppose naoh standardization of khp determined that a volume of 25. 00 ml naoh has a concentration of 0. 049 m. Suppose 22. 20 ml of khp was used to get to the endpoint in this standardization. What is the mass of khp dissolved in 50. 00 ml of the standardization khp titrant?.
The mass of KHP dissolved in 50.00 mL of the titrant is 0.5634 g.
KHP and NaOH react in a 1:1 ratio. That means that the amount of NaOH used is equal to the amount of KHP in the sample. We can calculate this amount:
c = n/V, so n = c * V = 0.049 M * 0.025 L = 0.001225 mol of NaOH and KHP
With this, we can calculate the amount of KHP in the 50.00 mL sample:
22.20 mL : 0.001225 mol = 50.00 mL : X
X = 0.001225 mol * 50.00 mL / 22.20 mL = 0.002759 mol
Finally, using the molar mass of KHP (204.22 g/mol), we calculate the mass of KHP in the titrant:
n = m/M, so m = n * M = 0.002759 mol * 204.22 g/mol = 0.5634 g
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The properties of matter are ways that you can _____matter.
(I have to fill in the blank.)
Answer:
measure suits the most here
state the law of definite proportions and explain.
Answer:
According to the Law of Definite Proportions, a chemical compound will always include the same weight proportions of each element, regardless of the quantity or source.
Explanation:
For instance, 21.5 grams of carbon and 28.5 grams of oxygen make up a 50-gram sample of carbon monoxide.
Answer: The law of definite proportions states that a given chemical compound always contains the same elements in the exact same proportions by mass
Explanation: The discovery that mass was always conserved in chemical reactions was soon followed by the law of definite proportions, which states that a given chemical compound always contains the same elements in the exact same proportions by mass. As an example, any sample of pure water contains 11.19% hydrogen and 88.81% oxygen by mass. It does not matter where the sample of water came from or how it was prepared. Its composition, like that of every other compound, is fixed.
Another example is carbon dioxide. This gas is produced from a variety of reactions, often by the burning of materials. The structure of the gas consists of one atom of carbon and two atoms of oxygen. Carbon dioxide production is of interest in many areas, from the amount we breathe to the amount of the gas produced by burning wood or fossil fuels. By knowing the exact composition of carbon dioxide, we can make predictions as to the effects of different chemical processes.
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When a vinegar and oil salad dressing separates into two layers, the oil floats on top of the vinegar. the density of the oil_____the density of the vinegar.
Answer:
Is less than
Explanation:
Vinegar contains more chemicals and molecules in it thus has a higher density thus pushing the oil upward because there is no room for the oil
When a vinegar and oil salad dressing separates into two layers, the oil floats on top of the vinegar, the density of the oil is less than the density of the vinegar.
What is density?A substance's density is a measurement of how heavy it is in relation to its size. When placed in water, an object will float if its density is lower than that of the water, whereas it will sink if its density is higher.
The density of a material is a distinguishing quality that is independent of the substance's volume.
A nonpolar material won't dissolve in a polar one. When oil and vinegar are combined, the vinegar is more thick and polar than the oil and sinks to the bottom of the container.
Because it is nonpolar and less thick than the vinegar, the oil floats on top rather than dissolving in it.
Thus, the density of oil is less than the vinegar.
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Which set of elements are ordered from small atomic radius to largest atomic radius? a.Fluorine, Chlorine, Bromine, lodine
b.Bromine, lodine, Chlorine, Fluorine
c.Chlorine, Fluorine, Bromine, lodine
d.lodine, Bromine, Chlorine, Fluorine
A Fluorine chlorine bromine iodide is the order of the elements that is ordered from small atomic radius to largest atomic radius as per their electrons and atom sizes.
What does atomic radius mean?A chemical element's atomic radius, is technically known as the average or typical distance between the nucleus's core and the outermost isolated electron, serves as a gauge for the size of an atom.
There are numerous types of non-equivalent definitions of atomic radius, and this is because the border is not a clearly defined physical entity.
What is the formula for calculating atomic radius?Only by measuring the separation between the nuclei of two contacting atoms and halving that distance can one determine the radius of an atom, and this stands true in the case of a covalent bond.
What factors influence atomic radius?A reduced atomic radius is the result of the electron cloud being drawn closer to the nucleus due to a higher effective nuclear charge's greater attraction to the electrons.
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Correct Question
Which set of elements are ordered from small atomic radius to largest atomic radius?
a. Fluorine, Chlorine, Bromine, Iodine
b. Bromine, Iodine, Chlorine, Fluorine
c. Chlorine, Fluorine, Bromine, Iodine
d. Iodine, Bromine, Chlorine, Fluorine
a substance that is composed of two or more elements or compounds that are not chemically combined
Substance that is composed of two or more elements or compounds that are not chemically combined is called mixture.
A material system known as a mixture is composed of two or more separate components that are joined physically but not chemically. When two or more substances are physically combined, their identities are maintained, and the mixture takes the shape of solutions, suspensions, or colloids.Homogeneous and heterogeneous mixtures are the two basic categories of mixtures.Heterogeneous mixtures have varying compositions and qualities throughout, meaning that the mixture's characteristics are not constant.A homogenous mixture is one that shares the same characteristics and composition across its mass.For example, the elements in the food we eat, the gases in the air we breathe, and the fuel we use in trains are all mixtures.Learn more about mixture here:
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whats a chemical reaction
9) Which compound is ionic?
a. CO2
b. H2O
c. KCl
d. SCl2
the _________ in the equation means a reaction is happening