Answer: The percentage of nitrogen and oxygen in ammonium nitrate is 35% and 60%
Explanation:
Name the phase change that occurs when a diamond film forms on a surface from gaseous carbon atoms in a vacuum?
Deposition, when a diamond film forms on a surface from gaseous carbon atoms in a vacuum, a gas changes directly into a solid.
What is deposition?Depositions typically take place in attorneys' offices rather than in courtrooms. A court reporter will record the entire deposition word-for-word while the lawyers interrogate the witness, or deponent, about details of the lawsuit and other events.
The reporter is present throughout the session and will create a transcript at a later time. A deposition could also be videotaped. This is typically done when the deponent is so very ill and may not be well enough for trial, or whether the deponent will be out of town or unavailable during trial.
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Identify items that can be used to control the boiling when heating liquid in a round bottom flask.
The items can be used to control the boiling when heating liquid is in a round bottom flask are boiling chips or stones,a stir bar and stir plate.
What is Boiling?
When a liquid is heated to its boiling point, which is the temperature at which the vapour pressure of the liquid equals the pressure placed on it by the surrounding atmosphere.
Because they provide even boiling and stop the solution from boiling over, boiling stones are very helpful in chemical labs. These chips are designed to be porous in order to permit the formation of solvent vapors in the air cavities.
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how are wavelength, frequency and energy related in an electromagnetic wave?
There are actually two models of electromagnetic radiation. One is the wave model, of course, and the other is the particle model, which postulates that radiation is made up of a stream of discretely sized particles called light quanta.
Different ideas about the energy connected to radiation are produced by the two theories.
The energy is stored in the EM fields that are moving through a region when the radiation is thought of in the wave model as an EM wave.
The wave oscillations in the wave model hold the energy.
Conceptually, the particle model differs slightly. Since each discrete particle in radiation has a specific amount of energy, the total energy of the radiant beam is determined by the number of discrete particles that make up the radiation.
In this scenario, the energy of each quantum is denoted by the formula E = h v, where h is Planck's constant.
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When a capacitor has a potential difference between the plates it is said to be ? . one plate has an excess of electrons and one has a deficiency of electrons.
while a capacitor has a capability distinction between the plates it's miles said to be consistent.
each plates have different fee which means that one has better ability than the other.
V= potential distinction across the plates , when the capacity distinction V is improved , rate on capacitors additionally will increase such that the ratio Q/V , remains consistent i.e. capacitance remains consistent . due to the fact capacitance relies upon upon plate location , medium between plates and distance among plates .
consequently, whilst we be a part of them in parallel, charge will float from better to lower. and it continued to go with the flow until equilibrium (the whole method took just a few seconds), indicating that the capacity remains consistent.
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A sample of ethanol (c2h5oh) contains 4.2x10^23 hydrogen atoms. how many c2h5oh molecules are in this sample?
There are 7.0 x 10^22 C2H5OH molecules in the sample.
Ethanol (also referred to as ethyl alcohol, grain alcohol, consuming alcohol, or actually alcohol) is an organic chemical compound. It is simple alcohol with the chemical system C2H6O. Its method can be also written as CH3−CH2−OH or C2H5OH (an ethyl team linked to a hydroxyl group) and is regularly abbreviated as EtOH. Ethanol is a volatile, flammable, colorless liquid with an attribute wine-like odor and pungent taste. It is a psychoactive drug, a leisure drug, and an energetic ingredient in alcoholic drinks.
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Describe how you could use anhydrous cobalt chloride to test that a colourless
liquid was water. State what you would do and what observations you would
look for.
The anhydrous cobalt chloride is blue in color and it absorbs water, on reaction with water it turns pink in color.
What is chemical reaction?A chemical reaction is defined as a process that lead to chemical transformation of one set of substances to another set.
There are basically four types of chemical reactions.
Synthesis reactionDecomposition reaction Single replacement reaction Double replacement reactionThe reaction between anhydrous cobalt chloride and water is also one of the chemical reaction.
Thus, anhydrous cobalt chloride is blue in color and it absorbs water, on reaction with water it turns pink in color.
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5. Kinetic and potential energy both relate to:
a. Heat
b. Light
c. Motion
Answer:
C. Motion
Explanation:
Potential energy is the energy stored within an object.
Kinetic energy is the energy an object posesses due to its motion.
Write a balanced chemical equation for the reaction that occurs when dimethylether, ch3och3(g), is combusted in air.
The balanced chemical equation for the reaction occurs when dimethyl ether, ch3och3(g), is combusted in air.
CH3OCH3(g) + 3O2(g) ----> 2CO2(g) + 3H2O(l)
A chemical is a substance with a defined composition. That is, chemicals are always made up of the same "things". Some chemicals are found in nature, such as water. Other chemicals are also manufactured, such as chlorine (used in bleaching fabrics and in swimming pools).
There are four main types of compounds, distinguished by how the atoms are bonded together. Molecular compounds are bound by covalent bonds. Ionic compounds are held together by ionic bonds. Intermetallic compounds are held together by metallic bonds. Coordination complexes are held together by coordinate covalent bonds. Non-stoichiometric compounds form a controversial edge case.
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An x-ray has a wavelength
of 2.2 x 10-11 m. What is
the frequency of the x-ray? Help asap please
Answer:
C
Explanation:
For electromagnetic waves frequency X wavelength = speed of light
f * 2.2 x 10^-11 = 3 x 10^8 m/s
f = 3 x 10^8 / 2.2 x 10^-11
= 1.36 x 10 ^19
= 1.4 x 10^19 with two significant digits
Answer: it's not C, it is A.
state what would be observed if each of the following reagents was added to the solution of aluminum chloride
i) lead (ii) nitrate solution
ii) ammonia solution drop wise until in excess
Answer:
See explanation
Explanation:
1) a precipitate of lead chloride would be observed if the concentrations of both reagents was high enough and the temperature was low enough
2) A gelatinous white-ish precipitate would be observed at first, though i'm not sure what would happen with excess ammonia. The precipitate would likely not dissolve in excess ammonia
Question 1 (1 point)
A block has a density of 1.73 g/mL. What is the block's density in mg/L?
172
A block has a density of 1.73 g/mL has a density of 1.73 * 10⁶ mg/L.
What is density of a substance?The density of a substance is the ratio of the mass of a a given volume of a substance and the volume of that substance.
Mathematically, the density of a substance is given by the formula shown below:
Density = mass of substance/volume of substance.Depending on the units in which the mass and volume of the substance is given, the unit of density can be given as follows:
kilogram per cubic meter; kg/m³
gram per cubic centimeter; g/cm³
gram per liter; g/L
milligram per liter; mg/L
The given block has a density of 1.73 g/mL.
To convert from gram to mg, we multiply by 1000
1.73 g = 1.73 * 1000 = 1730 mg
to convert from mL to L, we divide by 1000
1 mL = 0.001 L
Density of the block in mg/L = 1730 mg/ 0.001 L
Density of the block in mg/L = 1.73 * 10⁶ mg/L
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change into symbols
When lithium hydroxide pellets are added to a solution of sulfuric acid (H2SO4), lithium sulfate and water are formed.
Li₂SO₄+2H₂O is the result of the balanced chemical reaction, which is 2LiOH+H₂SO₄.
A balanced chemical reaction is what?A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.
Consequently, the balanced chemical equation is; For a balanced chemical reaction, the number of atoms of a given element on the left hand side should match the number of atoms of that element on the right hand side.
2LiOH+H₂SO₄ → Li₂SO₄+2H₂O
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what name is given to this molecule? a positively charged molecule. this molecule consists of three hydrogen atoms bonded to an oxygen atom. what name is given to this molecule? a positively charged molecule. this molecule consists of three hydrogen atoms bonded to an oxygen atom. methane hydronium ion water glucose hydroxide ion
Answer:
h20
Explanation:
science, 3 hydrogen and one oxygen make h2o
[tex]H_3O^+[/tex], hydronium ion is the name given to this molecule. Therefore, the correct option is option B among all the given options.
The smallest recognisable unit which which a pure material may be split while retaining its composition and chemical characteristics is a molecule, which is a collection of two or more atoms. Until portions consisting of tiny molecules are reached, the division of a sample for a substance onto progressively smaller parts does not result in a change with respect to its composition as well as its chemical characteristics. [tex]H_3O^+[/tex], hydronium ion is the name given to this molecule.
Therefore, the correct option is option B among all the given options.
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The foreign substance responsible for causing an allergic reaction is called a(n):______.
The foreign substance responsible for causing an allergic reaction is called an allergen.
The exaggerated reaction of our body’s immune system to certain foreign substances is known as an allergy.
The symptoms of allergy are sneezing, watery eyes, running nose, and difficulty in breathing which occur due to the release of certain chemicals like histamine and serotonin in our body.
The foreign substance that causes allergy is called an allergen.
Common examples of the allergens are pollen grains of certain plants, animal dander, and food items like peanuts, mushrooms etc.
To control the symptoms of allergy, drugs like antihistamines and steroids are used.
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Rick is a biologist who hypothesized that squid would swim faster in warm water than in cold water. rick conducted his experiment. he discovered that squid swim at the same rate in warm and cold temperatures. what should rick do next?
Scientific investigations can be used to reach the solution to the problem. The hypothesis of the experiments can be performed and the results and findings should be reported. Thus, option A is correct.
What is Scientific investigation?Scientific investigations have been defined as the series of steps that are used to solve the question and test the hypothesis to reach the solution. It uses logical means to experiment and research the topic.
After conducting an experiment the observed data, results, and findings must be reported so the process and the technical results can be used to define the issue or the problem that acts as a conclusion.
Therefore, option A. Rick must report his findings.
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Your question is incomplete, but most probably your options were,
A. Report his findings.
B. Throw away his experiment notes.
C. Report that squid swims faster in warm water.
D. Change his hypothesis.
An oxygen (o) atom has _____ protons, _____ neutrons, and _____ unfilled electron orbitals.
An oxygen (o) atom has 8 protons, 8 neutrons, and 2 unfilled electron orbitals.
What is electron orbitals?The three-dimensional regions surrounding an atom's nucleus known as electron orbitals are where a certain electron can be found. Two electrons can fit into each orbital.
They go by the name of atomic orbitals too. The number of electrons an atom contains determines the form of its atomic orbitals. The s, p, d, and f orbitals will all be covered in this lesson. Their orbital forms will also be revealed to us.
An orbital is a mathematical function that, according to its precise definition, represents the location of an electron in an atom with a high degree of probability. According to the mathematical function for that orbital, the term "atomic orbital" often refers to the area of space where an electron might be present.
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What is the limiting reactant for the following reaction given we have 3.4 moles of ca(no3)2 and 2.4 moles of li3po4?
Calcium nitrate [tex]Ca(NO_{3})_{2}[/tex] )is the limiting reactant for the reaction.
This is fewer than the 2.4 moles of lithium phosphate [tex]Li_{3} PO_{4}[/tex] that are readily available. This indicates a deficiency in calcium nitrate[tex]Ca(NO_{3})_{2}[/tex]. 2.4 moles of lithium phosphate must be added in order to complete the reaction.
As a result, calcium nitrate [tex]Ca(NO_{3})_{2}[/tex] is the limiting reagent and lithium phosphate[tex]Li_{3} PO_{4}[/tex] is in excess. The availability of Calcium Nitrate [tex]Ca(NO_{3})_{2}[/tex] is lesser than the 2.4 moles of lithium phosphate [tex]Li_{3} PO_{4}[/tex] that are accessible. This indicates that present amount of calcium nitrate [tex]Ca(NO_{3})_{2}[/tex] is inadequate to completely react with 2.4 moles of lithium phosphate[tex]Li_{3} PO_{4}[/tex]. Thus, calcium nitrate [tex]Ca(NO_{3})_{2}[/tex] is the limiting reagent and lithium phosphate [tex]Li_{3} PO_{4}[/tex] is in excess.
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In the redox conversion of Cr(OH)4 to
CrO2, the oxidation number of Cr goes from
(-1, 0, +3) to (-2, +6, +8). Recall that the
oxidation number of oxygen is typically -2.
If you move from the equator to a location in the mid-latitudes, the wintertime average temperature will _____, and the temperature range will _____.
If you progress from the equator to a location within the mid-latitudes, the wintertime average temperature will decrease, and thus the temperature range will increases.
What is the relationship between latitude and temperature?
As latitude increases, the temperature falls, and therefore the other way around. Generally, round the world, it gets warmer towards the equator and cooler towards the poles.
However, other factors could influence the temperature in several locations like altitude, precipitation, and ocean currents
Why is it called latitude?
On a map where north is up, latitudes run laterally (left to right). they're named after the angle created by a line connecting the latitude and the center of the Earth, and therefore the line connecting the equator and the center of the Earth. Latitudes specify the north-south position of a location on the world .
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The approximate diameter of the spherical nucleus of hydrogen-1 atom is 1 x 10-13 cm. estimate the density (g/cm3) of matter in a proton of mass of proton is 1.673 x10-24 g.
The density is 3.193 × 10^15 g/cm3.
Given;
Diameter = 1 x 10-13 cm
Mass = 1.673 x10-24 g
Volume = 4/3πr^3
Volume = 4/3 × 22/7 × (1 × 10^-13 / 2)^3
Volume = 11 × 10^-39 / 21
Density = Mass / Volume
= 1.673 x10-24 / 11 × 10^-39 / 21
Density = 3.193 × 10^15 g/cm3
What is density?
The amount of objects, including people, animals, plants, and other living things, that are present in a region is known as the density. The number of objects is divided by the area to determine density. The number of inhabitants in a nation divided by its size, measured in square kilometers or miles, is the population density of that nation.
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what is another name for relative abudance?
Percent Composition
Mass
Weight
The another name for relative abundance is Percent Composition
So, option A is correct
The relative abundances of all the stable isotopes of an element always add up to 100% since relative abundances are typically reported as percentages. A weighted average of these numbers determines the average atomic mass of an element.
The fraction of an isotope that is present on earth is quantified as its percentage abundance. It provides the amount of that specific isotope. The fraction of an isotope species in relation to all other elements in nature is known as relative abundance.
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3. Which of the following statements about matter is FALSE?
O Matter can be classified as an element and a mixture.
O Matter is anything that occupies and has mass.
O Matter exhibits two types of change: physical and chemical.
O Mafter refers to everything that makes up the entire universe.
Matter can be classified as element and mixture is a false statement.
Physical and chemical qualities are present in all matter. Physical qualities, such as mass, color, and volume, are characteristics that may be measured by scientists without modifying the makeup of the sample being studied (the amount of space occupied by a sample). Chemical characteristics, such as flammability and susceptibility to corrosion, define a substance's distinctive capacity to reacted to generate new substances. A pure substance's chemical and physical properties are the same in all samples. For instance, pure copper always forms a solid that is reddish-brown in color and dissolves in diluted nitric acid to form a blue solution and a brown vapor (a chemical property).
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What is the percent yield of koh when 22.4 grams of ko2 reacts with an excess of water to produce 13.9 grams of koh?
The percent yield of KOH is 78.7%.
Balanced chemical reaction:
4KO₂ + 2H₂O → 4KOH +3O₂
m(KO₂) = 22.4 g; mass of the oxide
m1(KOH) = 13.9 g; mass of the potassium hydroxide produced
n(KO₂) = 22.4 g ÷ 71.1 g/mol
n(KO₂) = 0.315 mol; amount of the oxide
From chemical reaction: n(KO₂) : n(KOH) = 1 : 1
n(KOH) = 0.315 mol; amount of the potassium hydroxide
m(KOH) = 0.315 mol x 56.1 g/mol
m(KOH) = 17.67 g; a theoretical yield of KOH
the percent yield = 13.9 g / 17.67 g x 100%
the percent yield = 78.7%
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A 21.0 -cm -long cylindrical glass tube sealed at one end is filled with ethanol the mass of ethanol needed to fill the tube is found to be 44.23 g the density of ethanol is 0.789 g/ml calculate the inner diameter of the tube in centimeters
1.843 cm is the inner diameter of a 21.0 cm long cylindrical glass tube.
What is inner diameter of a cylinder?
Two times the wall thickness of the pipe is subtracted from the total exterior diameter to determine the inner diameter of the pipe. By removing the pipe's walls from the computation, just the internal diameter remains.
Lets volume of tube be V
V = 44.23/0.789
calculate by using conversion factor= 56.058 cm^3
Volume of cylinder = πr^2h
⇒ r^2= [tex]\frac{V}{\pi h}[/tex] ,
⇒ r = [tex]\sqrt{\frac{V}{\pi h}}[/tex]
⇒ r = [tex]\sqrt{\frac{56.058 }{\pi 21}}[/tex]
⇒ r = 0.9215 cm
And as we have radius, we can calculate diameter
d = 2r = 2 × 0.9215 cm = 1.843 cm
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What are hydrocarbons?
Answer:
a compound of hydrogen and carbon, such as any of those which are the chief components of petroleum and natural gas.
"the rain is rich in benzene and hydrocarbons"
Answer: a compound of hydrogen and carbon, such as any of those which are the chief components of petroleum and natural gas.
Explanation:
in organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons are examples of group 14 hydrides. Hydrocarbons are generally colorless and hydrophobic, and their odors are usually weak or exemplified by the odors of gasoline and lighter fluid.
differentiate between an ion and a free radical
The key difference between free radical and ion is that the free radicals have one or more unpaired electron, but ions have paired electrons.
What is the Paired and Unpaired Electrons?
Unpaired electrons are the ones that appear in an orbital alone, while paired electrons are the ones that appear in an orbital as pairs in an atom. So, in the orbital, paired electrons always appear as two electrons, whereas unpaired electrons always appear as a single electron. The main distinction between paired and unpaired electrons is this. Additionally, whereas unpaired electrons result in paramagnetism or ferromagnetism in atoms, paired electrons cause diamagnetism in atoms.
What is Diamagnetism ?A change in the orbital motion of electrons caused by an applied magnetic field induces diamagnetism, a very weak form of magnetism. This magnetism is transient and only endures when an outside field is present.
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A compound is known to consist of 23.8% carbon, 5.9% hydrogen, and 70.3% chlorine. Find its formula.
how about give me brainliest b ll tt cc hh
True or false? the iron recommendation for girls exceeds that of boys during adolescence.
It is true that the iron recommendation for girls exceeds that of boys during adolescence.
During an adolescence, girls and boys require iron for a large growth spurt and the gain of adult phenotypes and biologic rhythms.
In this period of the life, iron recommendation increase in both girls and boys, because of the increase in lean body mass, the expansion of the total blood volume, the increase and start of menstruation at girls.
Iron is essential for oxygen transport, red blood cell creation, cognitive performance and immunological function.
The overall iron requirements for girls are up to twice as boys.
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Potassium nitrate is used for a variety of applications, including fertilizer, rocket fuel, and fireworks. how many molecules of potassium nitrate are in a 25 g sample?
There are 1.5×10^23 molecules molecules of potassium nitrate are in a 25 g sample.
molecules of KNO3 = 25gKNO3 x 1mol/101.11gKNO3 x 6.022x10^23 molecules/1mol = 1.5 x 10^23 molecules.
Molecules are made up of one or more atoms. If they contain more than one atom, the atoms can be the same (an oxygen molecule has two oxygen atoms) or different (a water molecule has two hydrogen atoms and one oxygen atom). Biological molecules, such as proteins and DNA, can be made up of many thousands of atoms.
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The ph scale is based on the number of ________ in solution.
a) protons
b) neutrons
c) hydroxyls
d) electrons
The ph scale is based on the number of hydroxyls in the solution.
What are hydroxyls?
Chemistry and biochemistry both use the hydroxy group extensively. The chemical product generated on the largest industrial scale, sulfuric acid, among many other inorganic substances, contains hydroxy groups.
In the dehydration events that form lengthy chains out of simple biological molecules, hydroxy groups take part. A fatty acid's carboxy terminus loses its OH group when it is joined to glycerol to create a triacylglycerol. The carboxy group at the aldehyde end of one sugar loses its OH group when two aldehyde sugars are joined to create a disaccharide. The carboxy group of one amino acid loses the OH when a peptide bond is formed to join two amino acids to form a protein.
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