Answer:
Sn°(s) + 2Ag⁺(aq) => Sn²⁺(aq) + 2Ag°
Explanation:
Sn°(s) => Sn²⁺(aq) + 2e⁻ [oxidation]
2Ag⁺(aq) + 2e⁻ => 2Ag°(s) [reduction]
Sn°(s) + 2Ag⁺(aq) => Sn²⁺(aq) + 2Ag°
Which of the following is NOT true regarding the scientists who
contributed to development of the atomic theory?
Rutherford conducted the gold foil experiment and discovered the nucleus.
Dalton was known for the plum pudding model of the atom.
Thomson discovered the electron using cathode ray tube experiments.
Bohr used spectrum of colors emitted by gas to support evidence of atomic orbitals
The choice from above which is not true about the scientists who made contributions to the development of the atomic theory is:
Dalton was known for the plum pudding model of the atom.
The correct answer choice is option b.
Understanding plum pudding model of the atom.John Dalton did not make a contribution of plum pudding model regarding the atomic theory. Surely, this model was based on the work of sir JJ Thomson. In his contribution, he stated that: " atoms were known to consist of negatively charged electrons "
An atom is an indivisible particle of an element which takes in a chemical reaction. This statement was made by Dalton.
So therefore, John Dalton did not propose the plum pudding model but was made by Thomson.
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Practice 3: What is the mass of the liquid?
What is the volume of the liquid?
What is the density of the liquid?
Mass of the liquid is the amount of the liquid counted up or measured in grams to calculate its actual mass.
What is mass, volume and density?Amount of liquid in the container or a vessel is always need to measured in volume , in litres to predict the capacity of container.Volume of the liquid is exactly what i said the litre or mL of water or liquid which is in the container, for example you have one litre water in 2 L of water bottle.Density is defined as mass per unit volume, that is to calculate the density we divide mass by volume.Density of pure water is taken to be one.To know more about density visit:
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No matter how much of a substance you have, the density always remains the same.
True or false
Answer:
True
Explanation:
Density is an intensive property. This means that regardless of the object's shape, size, or quantity, the density of that substance will always be the same. Even if you cut the object into a million pieces, they would still each have the same density
At a certain university there are five men’s residence halls. Dorm d1 needs 10 more persons to reach capacity, d2 needs five more, and d3 needs 15 more. No students have been assigned to d4 and d5, each of which can house 100 students. If it is desired to fill up d1, d2, and d3, in how many ways can 100 new male students be assigned to these five halls?.
1.615304584 ×10⁵⁸ ways can 100 new male students be assigned to these five halls.
How can probability be explained?A probability is a number that expresses the possibility or likelihood that a specific event will take place. Probabilities can be stated as proportions with a range of 0 to 1, or as percentages with a range of 0% to 100%.
Ways of selecting 10 students out of 100 = C(100,10) for D1.
After that 100-10 = 90 students are remaining.
Ways of selecting 5 students out of 90 is C(90,5) for D2.
Ways of selecting 15 students out of 90-5 = 85 is C(85,15) for D3.
Now number of remaining students is 85 -15 = 70.
Now for each of these 70 students we have 2 choices D4 and D5.
So these 70 students can be distributed in 2^70 ways.
So number of ways 100 new male students can be assigned to these five halls is
[tex]\begin{aligned}&=C(100,10) \cdot C(90,5) \cdot C(85,15) \cdot 2^{70} \\&=1.73 * 10^{13} * 43949268 * 1.798 * 10^{16} * 1.1806 * 10^{21} \\&=\mathbf{1 . 6 1 5 3 0 4 5 8 4} * \mathbf{1 0}^{58}\end{aligned}[/tex]
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Complete the chart for the following isotopes of the element Iodine
the pressure of the gas collected is equal to the ambient pressure, 744 mm hg. the experiment is run at 21 ºc, and the vapor pressure of water at this temperature is 18.65 mm hg. what is the pressure of the co2 collected in the experiment?
By using Dalton’s law of partial pressure, it is calculated that the [tex]CO_2[/tex]collected in the experiment has a pressure of 725.35 mm Hg.
A gas mixture's total pressure is equal to the total of the partial pressures of its component gases, according to Dalton's law of partial pressures.
Looking at the pressure in a closed container of gas and water is a frequent application of the Dalton's law of Partial Pressures. The pressure that the gas puts on the liquid is the system's overall pressure.
Real gases do not behave in an ideal manner; instead, they behave in an ideal manner only at low pressures and high temperatures. As a result, Dalton's law of partial pressure is only relevant at low pressures and low temperatures; it is not applicable at high pressures and low temperatures.
Given:
Pressure of mixture = 744 mm Hg
Temperature = 21℃
Pressure of Water vapour = 18.65 mm Hg
To find:
Pressure of [tex]CO_2[/tex] = ?
Formula:
Pressure of mixture = Pressure of [tex]CO_2[/tex] + Pressure of water vapour
Pressure of [tex]CO_2[/tex] = 744 - 18.65
P of [tex]CO_2[/tex] = 725.35 mm Hg
Result:
The pressure of [tex]CO_2[/tex] collected in the experiment is 725.35 mm Hg, according to Dalton’s law of partial pressure.
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one mole of the carbon-12 isotope contains 6.022 × 1023 atoms. what volume in m3 would be needed to store one mole of cube-shaped children's blocks 2.00 cm long on each side?
The volume in m³ needed to store one mole of cube-shaped children's blocks 2.00 cm long on each side is 4.816 * 10¹⁸ m³
What is the volume of one mole of cube-shaped children's blocks 2.00 cm long on each side?The volume of one mole of cube-shaped children's blocks 2.00 cm long on each side is calculated as follows:
The volume, V, of a cube is calculated using the formula: V = s³
where s is the length of one side of the cube.
Length of a side of the cube-shaped children's blocks = 2.0 cm or 0.02 m
The volume of the cube-shaped children's blocks = 0.02 m * 0.02 m * 0.02 m
The volume of the cube-shaped children's blocks = 8 * 10⁻⁶ m³
Volume of one mole of the cube-shaped children's blocks = 6.022 × 102²³ × 8 * 10⁻⁶ m³
Volume of one mole of the cube-shaped children's blocks = 4.816 * 10¹⁸ m³
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assume you are the chief operating officer of the fast food chain with 6,000 stores in north america. each store operates 360 days a year and has one heated dryer in the ladies and men's restrooms. each dryer operates 160 times per day per restroom. one pound is 453.60 grams. to dry your hands in a retail store restroom requires zero carbon dioxide emissions if you let your hands drip dry. if you use one standard size paper towel, 11 grams of co2 were generated to manufacturer the towel. if you use a standard heated electric dryer 19 grams of co2 are used to generate this energy and operate the dryer. how many pounds of carbon dioxide are released in the atmosphere from the heated electric hand dryers in the fast-food chain's stores? round your answer to the nearest whole number.
All the stores in the fast food chain combined produce 28,952,381 pounds of carbon dioxide on a yearly level.
Because there's one dryer in the men's restroom and one in the ladies' restroom, we have two dryers per store. If each dryer operates 160 times per day per restroom, the total number of daily operations per store is 2 * 160 = 320. Because there are 6000 stores in North America, the total number of operations per day is 320 * 6000 = 1,920,000. Finally, because the stores in the fast food chain work 360 days a year, the number of hand dryer uses on a yearly level is 1,920,000 * 360 = 691,200,000.
Because each hand dryer use generates 19 g of CO2, the total mass of carbon dioxide produced on a yearly level is 19 g * 691,200,000 = 13,132,800,000 g. As each pound contains 453.60 grams, the approximate number of pounds produced is 13,132,800,000 / 453.60 = 28,952,381
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spectroscopy unknown. the spectra and data provided were obtained from a pure organic molecule. for 1h nmr spectra, the integral is given in number of hydrogens (
The given data is of NMR spectroscopy and the only molecule identified from it is 2,2-dimethyl-1-phenylbutan-1-one.
NMR spectroscopy is an essential technique that uses radio frequency pulses to measure an atomic nucleus' resonant frequency in relation to its chemical or environmental surroundings (for example, the most prevalent stable isotopes 1H, 13C, and 15N).
2,2-dimethyl-1-phenylbutan-1-one (C12H16O, Mol. wt. 176 g/mol) is the only pure organic molecule identified by the data provided (Mass, IR, 1H NMR, and 13C NMR).
Two orthoprotons "a" in 1H NMR spectroscopy produce a signal at 7.8 ppm as a result of interaction with neighboring protons. At 7.5 ppm, a multiplet of one para proton (B) and two meta protons (C) is seen. Methylene protons 'd' pair with nearby three protons to form a quartet of two protons at 1.4 ppm. Singlet at 1.3 ppm is produced by six equivalent protons (proton "e") of methyl groups. Due to interaction with two methylene protons, three protons "f" appear as a triplet at 0.9 ppm.
Carbonyl carbon (C1) appears in 13C NMR spectroscopy at 211 ppm. At 138 ppm, ipso carbon (C2) signals. The other four aromatic carbons provide a stronger signal at 128 ppm and the para carbon (C3) to emerge at 133 ppm (C4). The signal levels for carbons C5, C6, C7, and C8 are 48, 33, 23, and 7 ppm, respectively.
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How many grams are in 869 moles of FeCL2?
The first step we have to follow is to find the molar mass of FeCl2 using the atomic masses of each element:
[tex]\begin{gathered} Fe=55.845g/mol \\ Cl=35.45g/mol\times2=70.9g/mol \\ FeCl_2=126.745g/mol \end{gathered}[/tex]It means that each mole of FeCl2 has a mass of 126.745g/mol.
Use the molar mass to find the mass of the given amount of moles:
[tex]869molFeCl_2\cdot\frac{126.745gFeCl_2}{1molFeCl_2}=110,141.405gFeCl_2[/tex]It means that there are 110,141.405 grams of FeCl2.
In scientific notation it would be 1.10x10^5g.
there are 110,141.405 grams of FeCl2
20.00 grams of KOH is added into distilled water and diluted with water to 1000 mL of final volume. What is the final concentration of the KOH?
The final concentration of the KOH if 20.00 grams of KOH is added into distilled water and diluted with water to 1000 mL of final volume is 0.35 M.
We know that,
The molar mass of KOH is 56.10 g/mol
The mass of KOH is 20.00 g
To calculate number of moles of KOH -
Moles of KOH = Given mass
Molar mass
Moles of KOH = 20.00 g
56.10 g/mol
Moles of KOH = 0.35 mol
The volume to be made up to 1000 mL = 1 L
The final concentration of KOH can be calculated as -
The molarity of solution is the ratio of number of moles to the total volume of solution in liters.
Molarity = Number of moles
volume of solution
Molarity = 0.35 M
1
Molarity = 0.35 M
Therefore, the final concentration of the KOH is 0.35 M.
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Transfer of thermal energy from the movement of particles from warm areas to cooler areas is ______.
A. convection
B. conduction
C. radiation
Answer: convection
Explanation:
I need help with this
The question requires us to calculate the volume of hydrogen gas in a balloon, given the number of moles of hydrogen, temperature and pressure in the balloon.
We can collect the following information from the question:
number of moles of H2 = n = 0.24 mol
temperature = T = 35°C
pressure = P = 1.05 atm
Since we need to calculate the volume of a gas and the temperature and pressure given are not the under the STP (Standard Temperature and Pressure), we'll need to apply the Ideal Gas Law equation:
[tex]P\times V=n\times R\times T[/tex]Rearranging the equation above to find volume (V), we have:
[tex]V=\frac{n\times R\times T}{P}[/tex]where n is the number of moles of hydrogen gas, T and P are the temperature and pressure given, and R is a the constant of gases (R = 0.0821 L.atm/mol.K)
Note that we need to use the units following the constant of gases - L for volume, atm for pressure, mol for number of moles and K for temperature. Thus, we need to convert the temperature given (35°C) into Kelvin degrees:
T = 35 + 273.15 = 308.15 K
Now that we have all required variables to calculate the volume, we replace them in the equation:
[tex]V=\frac{n\times R\times T}{P}\rightarrow V=\frac{(0.24\text{ mol)}\times(0.0821\text{ L.atm/mol.K)}\times(308.15\text{ K)}}{(1.05\text{ atm)}}\rightarrow V=5.78\text{ L}[/tex]Therefore, the volume of hydrogen in the ballon, under the given temperature and pressure, is 5.78 L.
As the question requires the answer expressed with two signifcant figures, we can write that the volume of hydrogen is 5.8 L.
the volume of hydrogen is 5.8 L
why do simple molecular substances smell
Simple molecular substance presumably small substances smell as the particle the release in the air, the odor they produce. The more volatile substance release particles off more easily hence stronger it smells.
The smells travels through the medium of air by the concept of diffusion. Diffusion is a method where air particle travels freely in all directions and eventually spread through air around them. The particles in diffusion move from higher concentration to lower concentration.
Different molecules have different smell as their molecular vibrations give them the distinct smell. Odorant compounds is not limited to carbon containing compounds, both organic and inorganic have odor e.g. [tex]NH_{3}[/tex].
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Potassium reacts with fluorine to produce the ionic compound potassium fluoride
Figure 3 shows the transfer of electrons during the reaction.
(d)
o-loilor
Describe what happens when potassium reacts with fluorine to produce potassium
fluoride. Write about electron transfer in your answer.
(5)
When potassium reacts with fluorine to from potassium fluoride one electron transfers from potassium to fluorine .
One electron from potassium is transferred to fluorine during the reaction that produces potassium fluoride.
How does electron transfer work?During the electron transfer mechanism, an iron atom in the pigment of a cytochrome molecule takes an electron, reducing it; the electron is then transferred to the iron atom in the following cytochrome carrier, oxidizing the first iron atom in the chain.
The reaction between potassium and fluorine results in a net positive charge for potassium and a net negative charge for fluorine, which together balance the compound potassium fluoride.
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The wide variety of species on Earth, whether they are plants, animals or microscopic organisms, are vital to keep the world's many ecosystems healthy, balanced, and thriving. Which of these environmental impacts is MOST likely to have a positive impact on biodiversity?
Answer:
Plants provide us with food, medicine, wood, fuel, and fiber. In addition, they provide shelter for a multitude of other living beings, produce the oxygen we breathe, maintain the soil, regulate humidity and contribute to climate stability.
Two different samples of matter are measured in each of these glass containers. Both of the containers show the same measure for both samples of matter. The samples most likely have which of these in common?.
Two different samples of matter are measured in each of these glass containers. Both of the containers show the same measure for both samples of matter. The samples most likely to have volume in common.
How do you identify the problem?The specific inertial and gravitational mass, as well as the volume it takes up, can be used to identify matter. A substance can exist in three basic states: solid, liquid, and gas.
What is volume, exactly?Volume is a three-dimensional measurement that's used to gauge a solid shape's capacity. It implies that a closed form's volume determines how much space it can occupy in three dimensions.
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Answer:
The correct answer is volume
Hope it helps
Explanation:
an 8.50 l tire contains 0.552 mol of gas at a temperature of 305 k . what is the pressure (in atm and in psi ) of the gas in the tire? (1 atm is approximately equal to 14.7 psi .)
The pressure inside the tire, assuming that the gas acts as an ideal gas, will be 1.6253 atm or 23.8 psi.
For calculations like these we utilize the ideal gas equation:
PV = nRT,
where P is the pressure exerted by the gas, V is the volume taken up by the gas, n is the amount of the gas (in moles), R is the universal gas constant (0.082057 Latm/molK) and T is the temperature (in Kelvins). Now we can say that:
P = nRT/V,
and plug all the known values into the equation:
P = 0.552 mol * 0.082057 Latm/molK * 305 K / 8.50 L = 1.6253 atm
Finally, because 1 atm = 14.7 psi, the pressure in the tire will be 1.6253 * 14.7 = 23.9 psi
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Please give answer with explanation.
Johannes Kepler was a German astronomer who lived in the 17th century. He was the first scientist to accurately describe the motions of the planets around the Sun with mathematics. More than 50 years after his death, an English physicist named Isaac Newton developed a mathematical theory of gravity that applied to all objects, not just planets.
The example described above suggests that
A.
scientific knowledge is never correct because it is constantly changing as new theories are developed and discoveries are made.
B.
scientists tend to all come from the same region and live during the same time period.
C.
scientists who make contributions to scientific knowledge often come from different backgrounds and live at different times.
D.
scientific knowledge does not change through time because the earliest scientists were totally correct.
Scientists who make contributions to scientific knowledge often come from different backgrounds and live at different times. Option C.
The planets are in elliptical motion around the sun. The figure below shows two orbits with the same semimajor axis, focus, and orbital period. One is a circle with an eccentricity of 0.0. The other is an ellipse with an eccentricity of 0.8. Johannes Kepler was a German mathematician and astronomer who discovered that the earth and planets orbit the sun in elliptical orbits.
He gave his three basic laws of planetary motion. He also did important work in optics and geometry. Johannes Kepler is best known for his three laws of planetary motion. These laws are: Planets move in orbits shaped like ellipses. The lines between the planets and the sun cover equal areas in equal time. He formulated the law of universal gravitation. He identified the first moons of Jupiter. He collected detailed data that led to the proposal of the heliocentric model.
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Plant reproductive seeds are not enclosed nor found on cones or similar structures. These seeds are referred to as ___________.
A)
conical
B)
flowering plant seeds
C)
gymiosperm
D)
angiosperm
E)
gymnosperm
Answer:
The answer would be E, gymnosperm
Explanation: Gymnosperms are an ancient group of plants that do not have flowers, they have a unique reproductive process, and produce seeds that are bare—, that is the seeds are not enclosed in a fruit!
Glucose is processed via glycolysis, pyruvate oxidation, and the citric acid cycle. What is left of the original glucose molecule when this processing is complete?.
At the end of glucose metabolism, 2 molecules of CO2 remain from the original glucose molecule
Glucose metabolism occur in three main pathways
1. Glycolytic pathway
Glucose is broken down to produce 2 molecules of pyruvate and ATP
2. Pyruvate Oxidation pathway
Pyruvate is oxidized to produce Acetyl CoA
3. Citric Acid pathway or Kreb's cycle
Acetyl CoA is further broken down to produce 2 molecule of CO2 and 3 molecules of NADP.
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A rocket launcher makes an angle of 53.1 degrees from the ground. It launches a rocket with an initial speed of 20.8 m/s.
How high is it from the ground, in meters, after 1.43 seconds???
Please help me. I really don’t understand this
[tex]0.1158 \10^{-3} times[/tex] mol of NaOH is needed to neutralise 36.1 ml of potassium hydroxide solution.
[tex]To\ determine\ the mass \ of {KHP}$ reaquired. \\we should first determine the number of moles of $\mathrm{NaOH}$ present is $3.21 \mathrm{~mL}$ of $36.1 \mathrm{M} \mathrm{MNaOH}$ solution.Moles of $\mathrm{NaOH}=$ molonity of $\mathrm{NaOH}$ $x$ solution of $\mathrm{NaOH}$ in $(\mathrm{L})$[/tex]
[tex]$$\begin{aligned}&=36.1\frac{\mathrm{mol}}{\mathrm{K}} \times \frac{3.21}{1000} \mathrm{~K} \\&=0.1158 \times 10^{-3} \mathrm{~mol} \text { of } \mathrm{NaOH}\end{aligned}$$[/tex]
What are moles?moles are the a standard scientific unit used to measure large quantities of very small entities such as atoms, molecules, or other defined particles. A mole means a very large number of units, 6.0221076 × 1023.
The number of atoms or other particles in a mole is the same for all substances. A mole is related to the mass of an element as follows:
one mole of carbon-12 atoms is 6.0221076 × 1023 atoms and has a mass of 12 grams. By comparison, one mole of oxygen, by definition, consists of the same number of atoms as carbon-12, but has a mass of 15,999 grams. Therefore, the mass of oxygen is greater than the mass of carbon. This reasoning can also be applied to molecular weights or formula weights.
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C₂H5OH (1) + 302(g) → 2CO₂(g) + 3H₂O(g)
1.25 mol C2H5OH reacts with
excess oxygen. What volume of
CO2 gas is produced at STP
during the reaction?
Volume (L) CO₂
Enter
PLEASE HELP IM ON THE LAST QUESTION
The volume of carbon dioxide gas produced at STP during the reaction is equal to 56 L.
What is the combustion reaction?Combustion reactions involve the complete oxidation of the fuel a hydrocarbon such reactions commonly liberate only carbon dioxide and water as products.
A hydrocarbon undergoes combustion to yield carbon dioxide and small amounts of water as the product. It can also be noted that no side products are left behind in the combustion reaction.
The given balanced combustion reaction of alcohol:
C₂H₅OH (l) + 3O₂ (g) → 2CO₂ (g) + 3 H₂O (g)
One mole of the ethanol produced carbon dioxide = 2 mol
Then 1.25 mol of the alcohol produced carbon dioxide = 2.5 mol
The volume occupied by one mole of carbon dioxide = 22.4 L
The volume of 2.5 mol of CO₂ = 22.4 × 2 = 56 L
Therefore, the volume of CO₂ gas produced during the reaction is 56 L.
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Answer: 56L
Explanation: The volume of carbon dioxide gas produced at STP during the reaction is equal to 56 L.
Water is leaking from the bottom of a conical cup that is 20 inches across and 20 inches deep. Given that the cup loses 0. 5 cubic inches of water per minute, at what rate is the water level changing when the water is 8 inches deep?.
A rate is what is used when two quantities are in a ratio but have different units. We can predict how one quantity will change as we adjust another using rates.
Volume of a cone = π*r^2*h/3
= π*10^2*20/3
= 2094.3951 cubic meters.
Volume of water lost when its 8 inches deep = V = π*r^2h/3
= π·10^2·12/3
= 1256.63706 cubic meters.
Remaining volume = 2094.3951 - 1256.63706
= 837.758 cubic meters.
Volume of water lost per minute = 0.5 cubic meters.
Time remaining = 837.758 * 0.5
= 7 hours approx.
Volume is a measurement of three-dimensional space that is occupied. It is frequently expressed mathematically using standard or SI-derived units. Volume and the measurement of length are connected.
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A wilting flower placed in water will be revived as water pressure in the plant cells increases. This change is brought about as a result of what process?.
When a withering flower is immersed in water, it will be revived as the water pressure in the plant cells rises, and hence the cells pull ups water through osmosis.
Wilting is defined as the loss of stiffness in non-woody plant components. This occurs as a result of the cells containing less water, which causes the turgor pressure in the non-lignified cell to decrease toward zero. If the solution is considerably diluted, meaning that the concentration of water inside the cell is lower than that of the medium surrounding the cell, then in this scenario, osmosis will take place and the cell will osmotically absorb water, and the cell will become turgid.
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Can someone put their own numbers in this sentence and solve it? Thanks!
A balloon with a pressure of ______ atm and a temperature of ____ Celsius has a volume of ______ mL. The day warms up and increases the temperature to ______ Celsius, which makes the pressure change to _____ mm Hg. What is the new volume of the balloon, in Liters?
A balloon with a pressure of 1 atm and a temperature of 17° Celsius has a volume of 1000 mL. The day warms up and increases the temperature to 27° Celsius, which makes the pressure change to 1520 mm Hg.What is the new volume of the balloon, in Liters?
The new volume of the balloon is 0.517 L.
By ideal gas law, PV = nRT
P = pressure
V = volume
n = number of mole of gas
R = gas constant
T = temperature
Using ideal gas law, P₁V₁/ T₁ = P₂V₂/ T₂
P₁= 1 atm
V₁ = 1000 mL = 1 L
T₁ = 17° C = 290 K
After the day warms up:-
P₂ = 1520 mm Hg = 2 atm
T₂ = 27° C = 300 K
Put these values in formula, P₁V₁/ T₁ = P₂V₂/ T₂
V₂ = P₁V₁T₂/ T₁ P₂
V₂ = 1 atm× 1 L × 300 K/ 290 K × 2 atm
V₂ = 0.517 L = 517 mL
Hence, the new volume of the balloon is 0.517 L.
The ideal gas equation is formulated as: PV = nRT.
In this equation, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the overall quantity of ideal gas this is measured in terms of moles, R is the universal gas constant, and T is the temperature.
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For a reaction where the rate equation is
rate = k [NH4 + (aq) ] [NO2(aq) ]
B. Calculate rate at temperature T2 , if the rate constant, k, is 3.20x104 L/(mol⋅s) when [NH4+ ] is 0.100 mol/L and [NO2] is 0.0150 mol/L.
Given:
Reactant A =
Reactant B =
X = Y =
Find:
Based on the rate constant of the reaction, the reaction rate, r 4.8 * 10⁻⁷ mol/L.s
What is the rate of a reaction?The rate of a reaction is the number of moles of reactant molecules converted or the number of moles of product molecules formed per unit time.
It is the rate at which product molecules are formed or reactant molecules disappear.
Reaction rate, r = moles of reactant converted / time or moles of product formed / timeThe rate equation of a chemical reaction is an expression that describes the relationship between the rate of the chemical reaction and the concentration of the reactants in the chemical reaction.
The rate equation includes a rate constant which is a constant that is unique for a given reaction. The rate constant numerically describes the rate and direction of a chemical reaction.
Considering the given rate equation:
reaction rate = k [NH4 + (aq) ] [NO2(aq) ]
the data provided is as follows;
k = 3.20 x 10⁴ L/(mol⋅s)
[NH4+ ] = 0.100 mol/L and,
[NO2] = 0.0150 mol/L
The reaction rate, r will be:
r = 3.20 x 10⁻⁴ L/(mol⋅s) * 0.100 mol/L * 0.0150 mol/L
r = 4.8 * 10⁻⁷ mol/L.s
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is KCN ionic or covalent (i need soeone to write me a cute small paragrah abut this please)
From the idea that the KCN is made of two ions of opposite charge, then the compound is ionic.
Is KCN ionic or covalent?We can say that a compound is ionic if the compound that is in question is composed of ions. Note that ions are species that are positively or negatively charged. As such, ionic compounds are essentially an ion pair and they are different from the covalent compounds.
The compounds that are covalent are the compounds that are forms when two atoms share electrons in a bond. In this case, there are no ions and we do not have species that have a full positive or negative charge as we do have with the ionic compounds that we discussed earlier here.
As we can see, the KCN compound is composed of the potassium ion that is positively charged as well as the cyanide ion that is negatively charged thus the compound must be said to be an ionic compound.
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What is the primary basis on which we divide the ingredients of the solar nebula into the four categories hydrogen/helium, hydrogen compounds, rock, and metal?.
Answer:
Composition. The ingredients of the solar nebula fell into 4 categories based on their condensation temperatures: metals, rocks, hydrogen compounds (water, methane, ammonia), and light gasses (hydrogen and helium).
Explanation: