Answers
Answer:
1.32*10^23 molecules
Explanation:
sucrose formula: C12H22O11
molar mass: 12(12.01)+22(1.01)+11(16.00)=342.34g/mol
75.0 g C12H22O11 * (1 mol C12H22O11)/(342.34g C12H22O11)=0.219 mol C12H22O11
0.219 mol * (6.022*10^23)/mol = 1.32*10^23 molecules (three sig. figures)
Related Questions
Knowing that the temperature of the Universe has been dropping with the expansion, and that today's CMB is at a temperature of 2.73 K, a) (2 pts) at what temperature would today's CMB photons have wavelength in the radio range, say 100 m? b) (1 pt) what would the scale factor be at that point?
Answers
The scale factor at which the CMB photons had a temperature of 1.9 K is 1.44 times smaller than today's scale factor.
a) At what temperature would today's CMB photons have wavelength in the radio range, say 100 m?The formula for the wavelength-frequency relation is given by:λν=cwhere,λ = wavelengthν = frequencyc = speed of light = 3 × 108 m/sSince the wavelength is given in the question to be 100 m, we can use the formula to find the frequency of CMB photons with a wavelength of 100 m.λ = c / ν100 = 3 × 108 / νν = 3 × 106 HzThe frequency of CMB photons with a wavelength of 100 m is 3 × 106 Hz.
Now, we can use the formula for the Planck distribution to find the temperature at which the photons would have this frequency. It is given by:Bν(T) = 2hc2/λ5 × (exp(hν/kT) - 1)where,Bν(T) = blackbody spectral radiancec = speed of lighth = Planck's constantk = Boltzmann constantT = temperatureSubstituting the values:2hc2/λ5 × (exp(hν/kT) - 1) = Bν(T)2hc2/(100 m)5 × (exp(6.626 × 10-34 × 3 × 106 / (1.38 × 10-23 T)) - 1) = 1.76 × 10-22 W/m2/Hz. The temperature at which the spectral radiance of CMB photons would be 1.76 × 10-22 W/m2/Hz is found by trial and error, and it is T = 1.9 K.
Therefore, CMB photons with a wavelength of 100 m would correspond to a temperature of 1.9 K.b) What would the scale factor be at that point?The relation between temperature and scale factor is given by:T ∝ a-1where, T is the temperature and a is the scale factor.
If the temperature of CMB photons is 1.9 K, then we can use the current temperature of 2.73 K to find the ratio of scale factors.2.73 K / 1.9 K = (a0 / a)where a0 is the scale factor today and a is the scale factor when the CMB photons had a temperature of 1.9 K.The scale factor at that point is:a = a0 × 1.44.
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Toma en cuenta los textos para responder estas interrogantes: ¿Consideramos que la aplicación de las medidas de seguridad depende de las características de tu entorno?
Answers
Answer:
Si.
Explicación:
Sí, la aplicación de medidas de seguridad depende de las características de su entorno porque el entorno nos brinda para elegir las medidas de seguridad. Existen diferentes instrumentos utilizados para la seguridad de diferentes entornos. Algunas medidas de seguridad se aplican en un entorno mientras que el otro se aplica a otro entorno. Por ejemplo, el vallado es una medida de seguridad que se puede aplicar en el terreno pero no en el agua o cualquier zona fangosa, por lo que podemos decir que las características físicas deciden qué medida de seguridad se debe instalar en el entorno.
Which of these is a sentence fragment?
The dog barked.
The skateboard wiggled back and forth.
The dog that was riding a skateboard.
We laughed at the dog on the skateboard.
Answers
Answer:
the dog barked is the answer
1.What us the chemical formula of Ab28?
2. Why does it differ from end member albite?
Answers
The chemical formula Ab28 does not correspond to a known chemical compound. It is not a recognized formula for any specific substance or compound. It is characterized by its sodium content.
A plagioclase feldspar mineral is albite. It is the plagioclase solid solution series' sodium endmember. It is a plagioclase that contains less than 10% anorthite. The formula for the endmember of pure albite is NaAlSi₃O.
The chemical formula Ab28 does not correspond to a known chemical compound. It is not a recognized formula for any specific substance or compound.
Albite is a mineral and a specific member of the plagioclase feldspar group with the chemical formula NaAlSi₃O₈. It is characterized by its sodium content. If Ab28 is intended to represent a variation or modification of albite, it would require additional details or specifications to understand the specific differences between them.
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1. Describe the motion of molecules in a solid. Why is gold only present in the
solid state?
Answers
Gold is present in its solid state because the metallic bonding in gold (the strong electrostatic attraction between positive gold atoms and the delocalised electrons) is very strong and needs a lot of energy to break. Hence, gold has a high melting point and so at average temperatures on Earth is found in its solid state.
As the motion of the molecules in minimum due to strong forces of attraction between the solid molecules as in case of gold and hence it is only found in solid state.
What are forces of attraction?
Forces of attraction is a force by which atoms in a molecule combine. It is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
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The specific heat of water is 4.184 J/g·K. How much energy must be added to 100.0 g of water to raise the temperature of water from 22.0 ºC to 90.0 ºC?
Answers
Answer:
10.9C digrey celsios and im sorry
Whats the different between chemical property and chemical change, and physical property and physical change?
Answers
Answer:
I think the answer is A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.
Explanation:
I hope this helps.
Answer:
Physical change is the same substance, while a chemical change is a new substance.
Lithium is not nearly as abundant as sodium. If sodium ion batteries that function as lithium ion ones were developed, do you think sodium cobalt oxide would still work as the electrode material?
Answers
Answer:
No, sodium cobalt oxide would not work as the electrode material
Explanation:
Sodium is a much larger cation than lithium. Remember that ion size is a very important consideration when developing a battery. The ions to be substituted must be nearly of the same size if one ion is to replace the other in a crystal.
Since sodium ions are larger than lithium ions, sodium cobalt oxide would not work as the electrode material in Lithium ion batteries.
Gallium is a metallic element in Group III. It has similar properties to aluminium.
(a) (i) Describe the structure and bonding in a metallic element.
Answers
Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.
Therefore, the outermost shells of these atoms are incomplete due to the sharing of valence electrons, forming a lattice structure known as a metallic bond.Metallic elements have a unique crystal structure that occurs in two forms. The most common type of metal crystal structure is the body-centered cubic structure where the atoms are arranged in a cube with one atom located at the center of the cube. The other type of metal crystal structure is the face-centered cubic structure, where each corner of the cube is an atom and there is an additional atom at the center of each face of the cube .Metallic bonding occurs due to the delocalized electrons that exist in the metal structure. The valence electrons from each atom are free to move throughout the entire metal lattice. Therefore, these electrons form a "sea of electrons" that is shared by all the atoms in the lattice. This results in the metal structure having high thermal and electrical conductivity.Metals are known for their ductility and malleability properties. These properties are due to the metallic bonding that exists in the metal structure. Since the valence electrons are shared, they can easily move past one another, allowing the metal to be hammered into different shapes without breaking.The properties of metals vary depending on their structure and bonding. Gallium, being a metallic element in Group III, has similar properties to aluminum. Therefore, it has a similar metallic bond structure with delocalized electrons that provide the metal with its unique properties.For such more question on valence electrons
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According to Euclid's second postulate, how far can the line segment shown be extended in either direction?
A
forever
B
until it intersects the X-AXIS
•
not at all
D
until it intersects the y-axis
Answers
Answer:
d is the correct answer and and
According to Euclid's second postulate, a fundamental principle of Euclidean geometry, a line can be drawn to infinity in both directions. Therefore, the correct option is A.
This implies that a line has no end and can go on indefinitely. This indicates that a line is an endless, unobstructed straight path. This postulate, which serves as a cornerstone of Euclidean geometry, establishes the basic properties of lines.
Euclid's second postulate makes it possible to find geometric relationships, angles and figures in an infinite space by allowing lines to be extended indefinitely. It serves as the basis for many geometric constructions and proofs and has important implications for our understanding of the mathematical properties of lines and angles.
Therefore, the correct option is A.
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In the quantum-mechanical hydrogen atom model, the angular momentum of the electron in the atom is determined by the integer ______.
Answers
Answer:
0 to n − 1
Explanation:
The angular or orbital quantum number, gives a description of the particular subshell or orbital where the electron is found and gives the magnitude of its orbital angular momentum.
The values of the angular momentum quantum number (ℓ) takes on integer values that ranges from 0 to n − 1
clarify the following expression s
a.atomic number
b.mass number
c.nucleus
Answers
Answer:
Atomic number of a chemical element is the number of protons found in the nucleus of every atom of that element.
The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus.
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom.
If the safety pin comes out while you're handling a BDU-33 practice bomb that has a MK4 MOD 3 signal cartridge, what must you do?
Answers
If the safety pin comes out the while we are handling the BDU-33 practice bomb that has the MK4 MOD 3 signal cartridge, we must notify the supervisor so that the bomb should be repair.
If the safety pin will comes out the while we are handling the BDU-33 practice bomb and been that has the MK4 MOD 3 signal cartridge, we must notify the our supervisor so that the bomb should be repair. The 2W1's aren not authorized to do the maintenance.
The BDU-33 practice bomb will weigh in the pounds is the 25 pounds. The BDU-33 practice bomb will be provides the force that is combat air forces with the inert munition to the facilitate the aircrew weapons delivery in the training.
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What is the molarity of 20.0 grams of NaOH dissolved in 1.50 L of solution?
(NaOH Molar Mass! 39.997 g/mol)
Answers
mol/L=g/(g/mol) (which is g times mols per g)
will give you mols then divide that by L to get mol/L
so
M=g x mol/g x L
M=(20 x 1 x 1.50)/39.997
100 ml of a 0.300 m solution of agno3 reacts with 100 ml of a 0.300 m solution of hcl in a coffee-cup calorimeter and the temperature rises from 21.80 °c to 23.20 °c. assuming the density and specific heat of the resulting solution is 1.00 g/ml and 4.18 j/g ∙ °c, what is the mass of the reaction solution?
Answers
Molarity H°rxn = Qrxn/(number of moles of AgNO3) = (1170.4 J)/(0.03 mol) ≈ 39013.33 J/mol = 39.013 kilojoules.
How do mol and molarity work?The term "Molarity" is derived from the unit of measurement called a mole, which is used to describe chemical substances. Calculating how amount of substance present in a certain chemical solution is done using a concept known as molarity, commonly known as the molar concentration of a solution.
Using the equation Q = m.c.T, Q =??? J, where Q is the quantity of heat produced by the solution, we can figure out the amount of warmth (Q) released from the solution.
The specific heat capacity (c = 4.18 J/g°C) of the solution determines its mass, or m, which is equal towards its density times volume, and (1.0 g/mL) divided only by volume, or 200 g.
(23.20 vs. 1.4) degrees Celsius is the difference in temperature (T) between the initial and final temperatures.
∴ Q = m.c. T = 200 g (at 4.18 J/g°C and 1.4 °C, respectively) = 1170.4 J. H°rxn = Qrxn/(number of moles of AgNO3)
The number of moles of immediately following in a solution that has a volume of 1.0 liters is known as molarity (M).
M is equal to (number of moles of AgNO3)/(volume of a solution (L)).
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NaOH+ HNO3 →What is the balanced equation ?
Answers
NaOH + HNO₃ ----> ?
This is a double replacement reaction. The general equation for double replacement reactions is:
AB + CD ----> AD + BC
To predict the products of this reaction we have to "exchange" the ions. Also, when an acid reacts with an hydroxide, we produce a salt and water.
sodium hydroxide + nitric acid -----> sodium nitrate + water
NaOH + HNO₃ -----> NaNO₃ + H₂O
To determine if the equation is balanced we have to find the number of atoms of each element that we have on both sides of the equation.
NaOH + HNO₃ -----> NaNO₃ + H₂O
Na: 1 Na: 1
O: 4 O: 4
H: 2 H: 2
N: 1 N: 1
We have the same amount of atoms of each element on both sides of the equation. Then the equation is balanced.
Answer: NaOH + HNO₃ -----> NaNO₃ + H₂O
correct formula for tetrafluorine monoxide
Answers
If you have 3.62 moles of Tin (Sn), how many grams do you have?
a
.031 grams
b
118.711 grams
c
32.79 grams
d
429.73 grams
Answers
Answer:
D.) 429.73 grams
Explanation:
number of moles x molar mass= mass in grams
3.62 x 118.71= 429.73 grams
How many aluminum atoms are in 30.0g of Al2O3
a) 0.294 atoms
b) 2 atoms
c) 1.77 * 10^23 atoms
d) 3.54 * 10^23 atoms
(I put C but that was wrong)
Answers
The number of aluminum atoms present in 30.0 g of \(Al_2O_3\) would be 3.54 x \(10^{23\) atoms.
Amount of atoms in substancesAccording to Avogadro, 1 mole of every substance contains about 6.022 x \(10^{23\) atoms or molecules of the substance.
\(Al_2O_3\) is a compound of aluminum and oxygen. In ion form, the compound ionizes to aluminum and oxygen ions as follows:
\(Al_2O_3\) ---> \(2Al^{3+} + 3O^{2-}\)
This means that every 1 mole of \(Al_2O_3\) contains 3 moles of Al.
Recall that: mole = mass/molar mass
Molar mass of \(Al_2O_3\) = 101.96 g/mol
Mole of 30.0 g \(Al_2O_3\) = 30/101.96
= 0.2942 mole
From the mole ratio, the equivalent mole of Al would be:
0.2942 x 2 = 0.5885 mol
We said: 1 mole = 6.022 x \(10^{23\) atoms
Thus, 0.5885 moles = 0.5885 x 6.022 x \(10^{23\) atoms
= 3.54 x \(10^{23\) atoms
In summary, 30.0 g of \(Al_2O_3\) will contain 3.54 x \(10^{23\) atoms of aluminum.
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The combustion of a candle is recognizable as a chemical transformation because they observe:
1) emission of light
2) heat emission
3) color variation
4) formation of a solid substance
5) formation of fumes
Answers
I think its 5) formation of fumes
I hope this helped :)
In the calvin cycle reaction, how would you describe co2 reduction?
Answers
The Calvin cycle's reactions are not dependent on light. CO2 reduction is the process through which carbon dioxide is fixed and ultimately converted to glucose.
The process that lowers CO2 is crucial to the Calvin cycle. In the crucial procedure known as carbon fixation, CO2 binds to RuBP to produce two to three carbon reduction molecules of phosphoglycerate. The Calvin Cycle's internal workings. Carbon dioxide (CO2) diffuses into the stroma of the chloroplast, the location of the Calvin cycle processes where sugar is generated, when it reaches the chloroplast of plants.
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How many moles of hydroxide (OH-) are in 25. 0 mL of 1. 00 M NaOH?
Answers
0.025 moles of hydroxide ions (OH-) are there in 25.0 mL of 1.00 M NaOH.
We may use the following formula to calculate the number of moles of hydroxide ions (OH-) in 25.0 mL of 1.00 M NaOH:
moles = concentration x volume
First, we need to convert the volume from milliliters to liters, which can be done by dividing by 1000:
25.0 mL = 25.0/1000 = 0.025 L
plugging in the values:
moles of NaOH = concentration x volume = 1.00 mol/L x 0.025 L = 0.025 mol
Since NaOH dissociates completely in water to produce one mole of hydroxide ions for every mole of NaOH, we have:
moles of OH- = 0.025 mol
Therefore, there are 0.025 moles of hydroxide ions (OH-) in 25.0 mL of 1.00 M NaOH.
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What is the electron configuration of a ground-state cr atom?
a. 1s22s22p63s23p64s14d5
b. 1s22s22p63s23p64s23d4
c. 1s22s22p63s23p63d6
d. 1s22s22p63s23p64s24d4
e. 1s22s22p63s23p64s13d5
Answers
The electron configuration of a ground-state Cr atom 1s22s22p63s23p64s13d5.
The distribution of electrons in an element's atomic orbitals is described by the element's electron configuration. Atomic electron configurations adhere to a standard nomenclature in which all atomic subshells that contain electrons are arranged in a sequence with the count of electrons they each hold expressed in superscript.
The atomic number Cr is 24. it has 24 electrons so the electronic configuration of \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{1} 3d^{5} .\)
Therefore, the electron configuration of a ground-state Cr atom \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{1} 3d^{5} .\)
Hence, the correct answer will be option (e).
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give the systematic name for the compound ba no3 2
Answers
The systematic name for the compound Ba(NO3)2 is barium nitrate. Barium nitrate is an inorganic salt with the chemical formula Ba (NO3)2. It is a colorless, odorless, and crystalline solid that is highly soluble in water. The compound is formed by combining one atom of barium and two ions of nitrate.
The name “barium” comes from the Greek word “barys,” which means “heavy,” and is a reference to its high density. The term “nitrate” refers to the polyatomic ion NO3-, which is composed of one nitrogen atom and three oxygen atoms. Barium nitrate is commonly used in pyrotechnics, as it is a powerful oxidizing agent that produces a bright green flame when ignited.
The systematic naming of inorganic compounds is based on the rules set out by the International Union of Pure and Applied Chemistry (IUPAC). The name of an ionic compound is composed of the cation name followed by the anion name. In the case of barium nitrate, “barium” is the name of the cation, while “nitrate” is the name of the anion.
Therefore, the systematic name for the compound Ba(NO3)2 is barium nitrate.
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A set of solubility data is given below.
What is the mass of the dry solute
recovered?
Sample
2
Temperature
(°C)
30.1
Boat Mass
(8)
0.730
Boat +
Solution (g)
0.929
Boat + Dry
(g)
0.816
Answers
Answer:
0.086
Explanation:
got it on acellus
The mass of the dry solute recovered from the given data is 0.086 g. Option C
To determine the mass of the dry solute recovered, we need to subtract the mass of the boat from the mass of the boat with the dry solute.
Given the data provided:
Boat Mass: 0.730 g
Boat + Solution: 0.929 g
Boat + Dry: 0.816 g
To find the mass of the dry solute, we subtract the boat mass from the boat + dry mass:
Mass of Dry Solute = (Boat + Dry) - (Boat Mass)
Mass of Dry Solute = 0.816 g - 0.730 g
Mass of Dry Solute = 0.086 g
Therefore, the correct answer is c) 0.086 g.
The mass of the dry solute recovered from the given data is 0.086 g. It is important to note that the mass of the dry solute is obtained by subtracting the mass of the boat from the mass of the boat with the dry solute, as the boat mass represents the weight of the empty boat or container used in the experiment.
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2C3H7OH + 9O2 --> 6CO2 + 8H2O
Determine the number of grams of CO2 produced from the reaction of 5.55 moles of C3H7OH
Answers
733 g CO₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[RxN - Balanced] 2C₃H₇OH + 9O₂ → 6CO₂ + 8H₂O
[Given] 5.55 mol C₃H₇OH
Step 2: Identify Conversions
[RxN] 2 mol C₃H₇OH → 6 CO₂
Molar Mass of C - 12.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of CO₂ - 12.01 + 2(16.00) = 44.01 g/mol
Step 3: Stoichiometry
Set up conversion: \(\displaystyle 5.55 \ mol \ C_3H_7OH(\frac{6 \ mol \ CO_2}{2 \ mol \ C_3H_7OH})(\frac{44.01 \ g \ CO_2}{1 \ mol \ CO_2})\)Multiply/Divide: \(\displaystyle 732.767 \ g \ CO_2\)Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
732.767 g CO₂ ≈ 733 g CO₂
A:
1. Identify the type of rock
associated with the picture.
Answers
The type of rock associated with this picture is a Meteorite.
What are Meteorite?A meteorite is a type of rock that originates from space and lands on Earth. Most meteorites are fragments of asteroids that have broken off due to collisions in space.
When a meteoroid (a small piece of rock or debris in space) enters the Earth's atmosphere, it begins to heat up and glow, creating a meteor or "shooting star." If the meteoroid survives the passage through the atmosphere and reaches the Earth's surface, it is called a meteorite.
The rock shown in the picture seems to be about to land on Earth which meant it originated from space and so is a meteorite .
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What is a niche?
A) the role or job of an organism in the environment
B) how an organism reproduces
C) what an organism eats
D) the life cycle of an organism
Answers
Answer: a)
Explanation:
definition : The niche of an organism is the functional role that it plays within an ecosystem
which particle is not used in calculating the atomic mass?
Answers
The smallest and least massive atomic particle is the electron, which is negatively charged.Due to the electron's extremely small mass, it is not counted inside the element's atomic number.
What particle does not add to mass?Although they are very small and possess a mass of 1/1850 of that of a protons or neutron, electrons carry a negative charge.Since they are so tiny, they do not, in reality, add to the weight of the atom.
What three particles make up an atom?These particles are frequently referred to it as subatomic particles since they are the building blocks of atoms.There are protons, neutrons, and electrons, three types of subatomic particles.Protons and electrons, two of a subatomic particles, each have an electrical charge of one or the other.
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identify the color absorbed by a solution that should appear as the given color.
Green =
Orange =
Blue=
Red=
Answers
Red = Green (complementary color). Blue = Orange (complementary color). Orange/Yellow = Blue (colors opposite on the colour wheel). Red = Cyan/Blue-Green (opposite hues on the colour wheel) are colours that a solution can absorb.
What influences a solution's colour?It relies on the wavelength of light that a substance or solution absorbs. The brightness and vibrancy of the colour will increase with increasing light intensity.
What can you say generally about the correlation between a solution's colour and the hue of light it absorbs?The complementary colour, or the colour across from the absorbed colour on the colour wheel, is what we see when a sample absorbs light of a specific colour. If a sample absorbs red light, for instance.
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