The lines are violet and blue respectively.
What is the energy?We know that the energy of the photon could be obtained by the use of the equation;
E = hf
E = energy
h = Plank's constant
f = frequency
For the first line;
E = 6.6 * 10^-34 Js * 3.45 x 10^14 Hz = 2.3 * 10^-19 J
Given that;
E = hc/λ
λ = hc/E
λ = 6.6 * 10^-34 * 3 * 10^8/2.3 * 10^-19
λ = 8.61 * 10^-7 m or 861 nm
The color is violet
For the second line;
E = 6.6 * 10^-34 Js * 6.53 xx 10^14 Hz
E = 4.3 * 10^-19 J
E = hc/λ
λ = hc/E
λ = 6.6 * 10^-34 * 3 * 10^8/4.3 * 10^-19
λ = 4.60 * 10^- 7 m or 460 nm
The color is blue
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how many moles of CaCo3 are there in an antacid tablet containing 0.512g CaCo3
The number of mole of CaCO₃ in antacid tablet containing 0.512 g of CaCO₃ is 5.12×10⁻³ mole
Description of moleThe mole of a substance is related to it's mass and molar mass according to the following equation:
Mole = mass / molar mass
How to determine the mole of CaCO₃From the question given above, the following data were obtained:
Mass of CaCO₃ = 0.512 gMolar mass of CaCO₃ = 40 + 12 + (3 × 16) = 40 + 12 + 48 = 100 g/mol Mole of CaCO₃ =?The number of mole in 0.512 g of CaCO₃ can be obtained as follow:
Mole = mass / molar mass
Mole of CaCO₃ = 0.512 / 100
Mole of CaCO₃ = 5.12×10⁻³ mole
Thus, 5.12×10⁻³ mole of CaCO₃ is present in the antacid tablet
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A molecular biologist measures the mass of cofactor A in an average yeast cell. The mass is 90.2 pg. What is the total mass
in micrograms of cofactor A in a yeast colony containing 10^5cells?
The total mass in micrograms of cofactor A in a yeast colony containing 10^5cells is 2.47 ug.
As a cofactor for several oxidative and biosynthetic activities in intermediate metabolism, coenzyme A (CoASH) has a distinct function. When acyl-CoA thioesters are produced from organic carboxylic acids, the acid is activated for additional biotransformation processes and enzyme recognition is facilitated.
A coenzyme is an organic, non-protein molecule that an enzyme needs in order to carry out its catalytic function. An enzyme is a protein that serves as a catalyst to speed up biological reactions without changing itself in the process.
24.7 pg./cell x 105 cells x 1 ug/106 pg.
= 24.7x10-1 ug
= 2.47 ug
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(c) Copper reacts with oxygen to produce copper oxide.
63.5 g of copper produces 79.5 g of copper oxide. Mr
Calculate the mass of copper oxide produced when 0.50 g of copper reacts with
oxygen.
Give your answer to 3 significant figures.
The answer would be 0.625 gram.
Copper oxide made from combining Copper and oxygen when copper comes under contact of oxygen it forms copper oxide.
Copper oxide is brownish in color.
Mainly used for nanoparticles or infrared filters and is a weak base.
It is an inorganic compound.
Copper (Cu) + Oxygen (O2) -----------> Copper Oxide (CuO)
If 63.5 gram of Cu produces 79.5 of Copper Oxide
Mass of copper oxide produces when 0.5 Copper react with oxygen = 79.5 g * 0.5 g / 63.5 g
Mass of Copper oxide = 0.625 grams
Hence the mass of Copper Oxide would be 0.625 grams.
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Which process allows liquid water on the surface to enter the atmosphere?
evaporation
condensation
sublimation
transpiration
The compound MgSO4 , Epsom salt, is used to soothe sore feet and muscles. How many grams will you need to prepare a bath containing 6.20 moles of Epsom salt?
Answer:
the value of the experiment with you and your family are doing well and that's what I was thinking took a break
The difference between oxygen and ozone
Differences between oxygen and ozone
oxygen exists as a diatomic molecule whereas ozone exists as triatomic molecules.oxygen mass is 32 amu on the other hand ozone has 48 amuOxygen has no odor but ozone has a very sharp odor. when oxygen atoms react with oxygen molecules then ozone forms. The average length of an O=O double bond is 121 pm on the other hand ozone exists in resonance ozone is a polar molecule and have stronger intermolecular forces. The contribution of the electron pair from the central oxygen atom leaves a small positive charge on the central O atom. hence ozone molecules become dipole whereas diatomic oxygen is non-polar.To know more about oxygen visit :
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Which of the following would you expect to form a molecular compound?
Potassium and nitrogen
Sodium and bromine
Hydrogen and sulfur
Iron and oxygen
Answer:
Iron and oxygen
Potassium and nitrogen
What is the formula for the molecule above? (Periodic table squares are provided below,
if you want them.)
A. H2
B. H2O
C.O2
D. H
Answer:
I believe H2.
Explanation:
It's H2 because there are two electrons on there being share by 2 atoms.
Since Hydrogen can only get a maximum of 2 electrons and no other atoms are present, that is why it's H2.
A child is 3 feet 5 inches tall. How tall is the child in meters? Convert feet to inches, add total inches and convert to meters.
A liquid solvent is added to a flask containing an insoluble solid. The total volume of the solid and liquid together is 90.0 mL. The liquid solvent has a mass of 47.3 g and a density of 0.865 g/mL. Determine the mass of the solid given its density is 3.25 g/mL.
The mass of the solid will be 114.7 g.
Density problemThe density of a substance is given as the ratio of its mass and its volume.
Also, a solid will always displace its own volume in a liquid.
Mass of liquid solvent = 47.3 g
Density of liquid solvent = 0.865 g/mL
Recall that: density = mass/volume
Volume of liquid solvent = mass/density
= 47.3/0.865
= 54.7 mL
Volume of solid + liquid solvent = 90.0 mL
Volume of solid = 90.0 - volume of liquid solvent
= 90.0 - 54.7
= 35.3 mL
Density of solid = 3.25 g/mL
Mass of solid = density x volume
= 3.25 x 35.3
= 114.7 g
The mass of the solid is 114.7 g.
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How many moles of calcium do you have if you measure out 19.13 g of calcium?
Answer:
0.4773 moles Ca
Explanation:
To find the amount of moles, you need to multiply the mass (g) by the atomic mass of calcium. The atomic mass compares the mass of calcium per every one mole. It is important to arrange the ratio in a way that allows for the cancellation of units (grams should be in the denominator). The final answer should have 4 sig figs to match the given value.
Atomic Mass (Ca): 40.078 g/mol
19.13 g Ca 1 mole
------------------- x ------------------- = 0.4773 moles Ca
40.078 g
You are managing a large feed lot. A pharmaceutical company wants you to try a new antibiotic to treat shipping fever in newly arrived cattle. The company claims that it is more effective at a lower cost than your current antibiotic.
The dependent variable in the information regarding the cattles is D. Temperature of Cattle.
What is a dependent variable?A dependent variable is one that is altered as a result of the modification of an independent variable. Your independent variable "depends" on the outcome you're interested in measuring. Dependent variables are also known as response variables in statistics (they respond to a change in another variable)
It is something on which other elements depend. For instance, a test result might be a dependent variable because it depends on a number of variables, including how much you studied.
In this case, one will measure the temperature of the cattle to see whether or not it works. This is the dependent variable.
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You are managing a large lot of cattle. A pharmaceutical company wants you to try a new antibiotic to treat Shipping Fever in newly arrived cattle. The company claims that it is less expensive and more effective than the current antibiotic you are using. You will measure the temperature of the cattle to see whether or not it works. WHAT IS THE DEPENDENT VARIABLE (DV)?
Type of cow
Antibiotic
No Antibiotic
Temperature of Cattle
What is Judy Hopps reception like once she joins the Zootopia police force? Why is this?
what percentage of a sample is remaining if you use the decimal (0.2536) and the fraction (3/7) of that sample
The percentage left is 57%.
What is the percentage remaining?We know that a fraction is a part of a whole. Let us in this case take the whole as one and then the fraction that we remove out of it is 3/7. We now have to find the percentage that remains.
Thus'
Fraction that remains = 1 - 3/7 = 4/7
Hence;
Percentage that is left = 4/7 * 100
= 57%
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An unknown noble gas has a density of 5.84 g dm-3 at STP. Calculate its molar mass, and so identify the gas.
Molar mass
Identify
The noble gas is Xenon and its molar mass is 131 g/mol.
What is the molar mass of the noble gas?The molar mass of the noble gas is determined as follows;
Let molar mass of unknown gas be M, and mass of gas be m
Density of the noble gas, ρ = 5.8 g/dm³
density = m/V
At STP;
temperature, T = 273.15 Kpressure, P = 1 atmmolar gas constant, R = 0.0821 L.atmK⁻¹mol⁻¹From ideal gas equation:
PV = nRT
where n = m/M
PV = mRT/M
M = mRT/PV
M = 0.0821 * 273.15 * 5.84/1
Molar mass of the noble gas = 131 g/mol
The noble gas is Xenon which has molar mass approximately equal to 131 g/mol.
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which of the following best describes the sum of all forces acting on an object ?
a: net force,which is a vector sum
b: net force,which is a scalar sum
c: acceleration, which is a vector sum
d: gravitational force, which is a vector sum
Answer:
the net force which is a vector sum
Explanation:
The net force is the vector sum of all the forces
That is, the net force is the resultant of all the forces
The vector sum of all the forces is called as the net force. In other words, the net force is the sum of all forces. Thus, option A is correct.
What is the sum of all forces acting on an object?The mass times the acceleration equals the sum of the forces. According to the second law, the acceleration is equal to zero if the object or system is not moving. As a result, the vector forces' sum must be zero.
The net force is the result of the vector sum of all the forces acting on a body. The item is considered to be in equilibrium if the net force is equal to zero.
The process of adding two or more vectors together to create a vector sum is known as vector addition. The so-called parallelogram law lays forth the guidelines for adding two or more vectors together.
By aligning the two vectors and head to tail and drawing the vector from the free tail to the free head, the vector total for the pair and may be calculated.
Therefore, vector sum best describes the sum of all forces acting on an object.
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Madison lives near the ocean. She’s formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals. If Madison plans to test this hypothesis, she will have to deal with the following variables in her experiment
In her experiment, she will have to deal with the following elements Amount of metal corrosion⇒ Airborne Salt Concentration⇒ Air Temperature.
What are the different types of corrosion?Uniform corrosion, pitting, crevice corrosion, filiform corrosion, galvanic corrosion, environmental cracking, and fretting corrosion are just a few of the various types of corrosion that may be seen with the unaided eye. Let's examine how these types of corrosion develop and how carbon steel can be harmed by them.
What causes corrosion?When a metal reacts with something else, such oxygen, hydrogen, an electrical current, or even dirt and germs, it corrodes. When metals like steel are subjected to excessive strain, which causes the substance to split, corrosion can also occur.
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The complete question is -
Select the correct answer from each drop-down menu.
Madison lives near the ocean. She's formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals. If Madison plans to test this hypothesis, she will have to deal with the following variables in her experiment:
Dependent variable: [AIR HUMIDITY/AIR TEMPERATURE/AMOUNT OF METAL CORROSION]
Independent variable: [AIRBORNE SALT CONCENTRATIONS/VOLUME OF OCEAN WATER/OCEAN WATER TEMPERATURE]
One possible confounding variable: [AIR TEMPERATURE/AIRBORNE SALT CONCENTRATIONS/COLOR OR NEARBY OCEAN WATERS]
The density of silver is 10.49 g/cm³. What is the mass of a piece of silver with a volume of 4.83 cm³?
Density is a physical property that relates the mass of a substance with the volume occupied by the mass of the substance. The density of the substance can be used to examine the purity of the substance.
Which statement about reversible reactions is correct? (1 point)
O The forward and reverse reactions must happen at the same rate.
O They are always at equilibrium.
O They always involve gases.
O They can occur in either direction.
Answer: the last one
Explanation: it is the only one that makes sense \
sorry if its wrong
235 miles converted to kilometers
Answer:
378.196
Explanation:
235 miles = 378.196 Kilometers
Upon being diagnosed with Cirrhosis of the liver, doctors urge patients to limit the amount of salt intake in their diet to help decrease the rate of scarring. During salt intake the blood becomes increasingly (hypertonic, hypotonic) to the interstitial fluid. Due to this osmotic imbalance, the liver cells become (hypertonic, hypotonic) to the interstitial fluid. This causes the liver cells to appear (shriveled, swollen).
Upon being diagnosed with cirrhosis of the liver, doctors urge patients to limit the amount of salt intake in their diet to help decrease the rate of scarring. During salt intake the blood becomes increasingly hypertonic to the interstitial fluid. Due to this osmotic imbalance, the liver cells become hypotonic to the interstitial fluid. This causes the liver cells to appear swollen.
What is cirrhosis?Cirrhosis is a liver injury that is generated by various causes in which the liver begins to form fibrous because scars are generated in it. The lesions occur for different reasons, such as excessive alcohol consumption, and the liver will try to heal itself by forming scars, but as this happens, the cirrhosis worsens and can be fatal.
Therefore, we can confirm that upon being diagnosed with cirrhosis of the liver, doctors urge patients to limit the amount of salt intake in their diet to help decrease the rate of scarring. During salt intake the blood becomes increasingly hypertonic to the interstitial fluid. Due to this osmotic imbalance, the liver cells become hypotonic to the interstitial fluid. This causes the liver cells to appear swollen.
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Complete this analogy: Competition is to ____________as_
is to food webs. *
Answer:
Competition occurs when individuals of different species struggle to obtain the same resource in an ecosystem (such as food or living space). Adaptations, such as physical mutations and behavior modifications, can help an organism outcompete its competitors.
Chemistry
zinc tetraoxosulphate vi solution was electrolyzed in such a way that is 0.5A flowed for 32min 10 sec, deposited 0.325g of zinc at the Cathode · Calculate 1. The number of moles of zinc deposited (2) The number of Coulombs of electricity required to deposit I mole of zine (3) The charge on a zinc ion (IF = 96500C, zn=65)
the number of moles of zinc is 0.00492, and coulomb's of charge = 965coulumnbs and charge of zinc is +2
Zinc mass divided by zinc molar mass equals the number of moles of zinc deposited. Moles of zinc deposited in number=0.32/65 ,0.00492 moles of zinc were deposited.
the number of coulombs = I X t so 0.5 X 1930 sec so 965 coulombs.
The charge on zinc ion is +2
In the International System of Units, the unit of electric charge is the coulomb. It is equivalent to the electric charge delivered by a 1 ampere continuous current in 1 second and to 51018/0.801088317 in the current edition of the SI. fundamental charges
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the charge of zinc is +2, there are 0.0049 moles of zinc, and the coulomb's of charge are 965 coulombs.
The number of moles of zinc deposited is equal to zinc mass divided by zinc molar mass. Moles of zinc were deposited in number=0.32/65, amounting to 0.0049 moles.I times time equals 0.5 times 1930 seconds, or 965 coulombs.Zinc ion's charge is +2In the International System of Units, the unit of electric charge is the coulomb.It is equivalent to 51018/0.801 in the most recent edition of the SI, which is the electric charge produced by a 1 amp continuous current in a second.When a direct electric current is passed through an electrolyte, it causes chemical reactions at the electrodes and material degradation. Electrolysis is accomplished using an electrolyte, electrodes, and an external power source.
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The data table below shows the yield of vegetables in a school's garden for three years. The yield is the number of pounds of vegetables harvested. The same number of each type of vegetable was planted every year
The correct option is (d) ,i.e., the acorn squash yield lessen from 2012 to 2013 due to lower temperatures.
To estimate yield of vegetables in a harmonious manner, one can gather 10' of row at several locales in the field. Multiply the average yield( lb) per 10' of row times the following row distance factors to convert the sample of yields of vegetables to lb/A.
The question is incomplete the given questions is a multiple choice question :
The data table shows the yield of vegetables in a garden of the school for 3 years. The yield is the number of pounds of vegetables gathered. The same number of each type of vegetable was planted every time. Which statement is an inference?
a. the onion yield was higher than the beet yield in 2013
b. the butternut squash yield lessened from 2011-2012
c. the spinach yield was 102 pounds in 2011 and 137 pounds in 2012
d. the acorn squash yield lessen from 2012 to 2013 due to lower temperatures
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Please help! I don’t know what 4 and 5 is
Which molecule is more polar, RCH2COCH2R or RCH2(OH)R?
The answer would be RCH2COCH2R is more polar than RCH2(OH)R
The formic acid ( RCH2COCH2R ) is more polar than Pyridinium Chlorochromate (PCC) (RCH2(OH)R) because formic acid is from aldehyde group and is a reagent from a carbonyl group and PCC is react to form carbonyl group it's also an reagent which reacts in oxidation of alcohols.
The polarity is more which is a carbonyl compound as their electrons are loosely prepared. And also the polarity of formic acid is 6.0.
Hence, the formic acid (RCH2COCH2R) is more polar than Pyridinium Chlorochromate (RCH2(OH)R) (PCC).
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Which of the following atoms has the highest ionization energy?
Aluminum (Al)
Sodium (Na)
Phosphorous (P)
Magnesium (Mg)
The phosphorus atom have has the highest ionization energy .
The ionisation energy of atoms are given as ,
Sodium ( Na ) = 496
Phosphorus ( P ) =1012
Magnesium (Mg ) =738
Aluminium ( Al ) = 578
Since , phosphorus atom have half filled configuration . It is very difficult to remove electrons from atoms having half filled configuration . Hence, it requires more energy .
The ionisation energy measures an element's ability to participate in chemical processes that call for the creation of ions or the donation of electrons. It is often connected to the type of chemical bonds that exist between the components in the compounds they form. See also electron affinity and binding energy.
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When you were young you may have had your own theory about why plants are green. Then, as you learned more, you kept ideas that were correct, but replaced ideas that were incorrect. Atomic theory also changed as scientists improved their understanding. What incorrect idea in Bohr’s understanding of the atom was replaced in later theories?
Atoms can not be divided is the incorrect idea in Bohr’s understanding of the atom.
Bohr believed that electrons circled the nucleus in orbits. According to current atomic theory, electrons don't follow predetermined routes.
Bohr believed that electrons traveled in circular paths around the nucleus, but current theory suggests that the structure of atomic electrons is more to 3D standing waves.
Bohr improved on Rutherford's atomic model. The majority of the atom's mass is concentrated in its nucleus, which we now refer to as the center of the atom, and electrons surround the positive mass in a manner to a cloud. Bohr's use of the quantification energy to explain the model was his most important contribution. According to his theories, electrons circling the nucleus have quantized potential and kinetic energies.
The Heisenberg Uncertainty Principle is first violated by the Bohr model because it assumes that electrons have a known orbit and radius. The Bohr Model is less effective at drawing diagrams of larger atoms and gives an incorrect value for the ground state orbital angular momentum.
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Convert 0.00200 g into Mg and answer in scientific notation:
Answer: [tex]2.00x10^{2}[/tex]
Explanation: 1 gram is equal to 1000 Milligrams so
[tex]0.00200g=\frac{1000mg}{1g}[/tex]
Since you go straight across its just multiplication so 0.00200x1000=200mg
To answer it in scientific notation it should just be [tex]2.00x10^{2}[/tex] mg
When 10g of hydrogen gas is combined with 26g of nitrogen gas to form ammonia, what is the limiting reagent?
the limiting reagent is nitrogen gas.
steps:
write out balanced equation: 3H2 + N2 = 2NH3
convert to moles to find how much NH3 each yields
find molar mass of each
10 g H2 (1 mol/2.016g) (2NH3/3H2) = 3.31 mol NH3
26g N2 (1mol/28.02g)(2NH3/1N2)=1.86 mol NH3
since N2 yields less NH3, it is the limiting reagent.
