QUANTITATIVE CHEMISTRY QUESTION!!
When heated calcium carbonate forms calcium oxide and dioxide
The equation for the reaction is;
USE THE IMAGE ATTACHED TO WORK OUT THE ANSWER FOR ME PLEASE I WILL MARK YOU THE BRAINIEST IF YOU HAVE COMPLETED THE QUESTION CORRECTLY
Answers
Answer:
Explanation:
look at the mole ratio so you can solve
Answer:
IM NOT SURE
Explanation:
Related Questions
Give an example of a physical change in matter.
Answers
Answer:
Freezing or boiling water
The number of units expected to be sold is uniformly distributed between 300 and 500. If r is a random number between 0 and 1, then the proper expression for sales is a.r 300. b.300 500(r). c.300 r(200). d.200(r).
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The proper expression for sales, given that the number of units expected to be sold is uniformaly distributed between 300 and 500, would be:
b. 300 + 200(r)
Let's break down the expression:
The random number, "r," is multiplied by the range of possible values for sales, which is 200 (500 - 300).
This product, 200(r), represents a scaling factor based on the random number.
The result is added to the lower bound of the sales range, which is 300, giving us the final expression of 300 + 200(r).
So, option b, 300 + 200(r), is the correct expression for sales in this scenario.
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Which of the following quantities are required for calculating density? Select all that required.
Volume
Area
Mass
Weight
Answers
Answer:
Mass and Volume
Explanation:
The formula for density is
\(\frac{Mass}{Volume}\)
In beta oxidation of linoleic acid, what is the cost in total ATPs for the presence of the two double bonds compared to the saturated carbon chain stearic acid? (hint: how many more electron carriers is produced in beta oxidation for stearic acid vs linoleic acid and how does that affect # of ATPs)
Answers
The presence of the two double bonds in linoleic acid increases the number of electron carriers produced during beta oxidation, which ultimately leads to the production of more ATPs.
In beta oxidation of linoleic acid, the cost in total ATPs is higher compared to the saturated carbon chain stearic acid. Linoleic acid has two double bonds, which means that it requires two more rounds of beta oxidation compared to stearic acid, which only requires one. During each round of beta oxidation, one molecule of FADH2 and one molecule of NADH are produced, which can be used to generate ATP through oxidative phosphorylation. Therefore, stearic acid produces two electron carriers in one round of beta oxidation, while linoleic acid produces only one.
Since stearic acid only requires one round of beta oxidation, it produces two electron carriers (FADH2 and NADH) and generates a net of 8 ATPs through oxidative phosphorylation. On the other hand, linoleic acid requires two rounds of beta oxidation, which produces a total of four electron carriers (two FADH2 and two NADH). These four electron carriers can generate a net of 18 ATPs through oxidative phosphorylation.
Therefore, the presence of the two double bonds in linoleic acid increases the number of electron carriers produced during beta oxidation, which ultimately leads to the production of more ATPs. However, the cost of beta oxidation is higher for linoleic acid compared to stearic acid due to the additional rounds required.
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(Please help)
What is the most common isotope for element X
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Answer:
Isotope 2
Explanation:
Isotope 2 is the most abundant. Its percent abundance is 78.68% which is the largest percentage, and therefore the most common of the isotopes presented.
Good luck!
Balance the following reaction. A coefficient of "1" is understood. Choose the option "blank" for the correct answer if the coefficient is "1."
C3H8 + O2 → CO2 + H2O
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Answer:
Hope this helps!
Explanation:
A population of a wild animal is a frequent target for hunters. Hunters tend to hunt the larger animals with big horns. How might this affect the populations in the wild?
A.
Animals with average horns will increase in number.
B.
Smaller animals with a trait for short horns will become endangered.
C.
Traits for larger animals with big horns will be selected.
D.
Traits for smaller animals with short horns will be selected.
Answers
Traits for larger animals with big horns will be selected.
What happened to the energy of the system when the baking soda mixed with the vinegar?
A
Energy was released to the surroundings in the form of heat,
B
Energy was released to the surroundings in the form of bubbles,
C
Energy was stored in the system to change the phase of the substance,
D
Energy was absorbed by the system to carry out a change in the substance,
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Answer:
C
Explanation:
I hope it help
It help you mixed up
What products would you expect from the reaction of ammonia and sulfuric acid in aqueous solution
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Answer:
(NH4)2SO4
Explanation:
2NH3(aq) + H2SO4 (aq) ---> (NH4)2SO4(aq)
Ammonia reacts with sulfuric acid to give the fertilizer ammonium sulfate.
N_{2}(g) + 3H_{2} * (g) < =2NH 3 (g)+heat What will happen to equilibrium if the temperature decreases?
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ANSWER
The arrow will be shifted to the right (OPTION B)
EXPLANATION:
Firstly, we need to write out the chemical reaction equation
\(N_{2(g)}+3H_{2(g)}\text{ }\rightleftarrows2NH_{3(g)}\text{ + heat}\)From the reaction above, you will see that heat is one of the products, this means that the reaction is n exothermic reaction.
An exothermic reaction is a type of reaction in which heat is released to its surroundings.
In an exothermic reaction, a decrease in temperature will shift the equilibrium to the right
Zinc reacts with Copper (II) chloride to produce Copper and Zinc chloride. -write chemical formula
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Answer:
here's the answer hope it helps
a uv/vis spectrometer was used to determine the concentration of an unknown colored compound in solution. the cuvette had a path length of 1.00 cm and the molar absorptivity was found to be 0.296 m- 1cm-1. find the concentration of the unknown compound in solution if the absorbance was measured to be 0.314 a.
Answers
1.0608 mol/L is the concentration of the compound measured using UV/Vis spectrophotometer.
The equation for the Beer-Lambert Law has the following structure:
A=E×b×c
Where b is the sample's route length, E is the molar absorptivity, A is absorbance, and c is the compound's concentration in solution.
In question: E is 0.296 m- 1cm-1. A is .314 and path length is 1.00 cm.
By adding values in formula the answer is 1.0608 mol/L.
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Certain birds, such as the flaming or the kori bustard bird, are able to fly because of a certain internal adaptation to their bones. These criss-cross structures allow the bird to be lightweight but still retain bone strength.
Which adaptation makes it easier for birds to fly?
A. gills
B. struts
C. cartilage
D. bone marrow
Answers
because the bodies of birds are adapted for flying. Many of a bird's bones are less dense than human bones, which makes birds' bodies lightweight. Flying birds have large chest muscles that move the wings.
For the following reaction, 35.0 grams of zinc oxide are allowed to react with 6.85 grams of water . zinc oxide (s) + water (I) ⟶ zinc hydroxide ( aq ) What is the maximum amount of zinc hydroxide that can be formed? grams What is the FORMULA for the limiting reagent? What amount of the excess reagent remains after the reaction is complete?
Answers
10.63 grams of ZnO remain after the reaction is complete.
The balanced chemical equation for the reaction between zinc oxide and water is:
ZnO(s) + H2O(l) → Zn(OH)2(aq)
No. of moles of ZnO = Mass of ZnO / Molar mass of ZnO= 35.0 g / 65.38 g/mol= 0.535 moles of ZnO
The amount of water is given as 6.85 g
The molar mass of water is:H2O = 18.02 g/mol
No. of moles of H2O = Mass of H2O / Molar mass of H2O= 6.85 g / 18.02 g/mol= 0.380 moles of H2O
Now, we need to find out the limiting reagent.
.No. of moles of Zn(OH)2 formed from 0.535 moles of ZnO = 0.535 molesNo. of moles of Zn(OH)2 formed from 0.380 moles of H2O = 0.380 moles
Therefore, since the amount of ZnO (0.535 moles) is greater than the amount of H2O (0.380 moles), H2O is the limiting reagent and ZnO is the excess reagent.
The maximum amount of Zn(OH)2 that can be formed is given by the amount of ZnO that reacts with H2O, which is 0.380 moles.
No. of grams of Zn(OH)2 = No. of moles of Zn(OH)2 × Molar mass of Zn(OH)2= 0.380 mol × (97.41 g/mol)= 37.08 gThe formula for the limiting reagent is H2O. The amount of excess reagent remaining after the reaction is complete can be calculated by subtracting the amount of limiting reagent used from the initial amount of excess reagent
.Initial amount of excess reagent (ZnO) = 35.0 g
No. of moles of ZnO = Mass of ZnO / Molar mass of ZnO= 35.0 g / 65.38 g/mol= 0.535 moles of ZnO
Amount of ZnO used in the reaction = No. of moles of Zn(OH)2 formed × Ratio of ZnO to Zn(OH)2= 0.380 mol × (1 mol ZnO / 1 mol Zn(OH)2)= 0.380 moles of ZnO used
Amount of ZnO remaining after the reaction = Initial amount of ZnO − Amount of ZnO used= 35.0 g − (0.380 mol × 65.38 g/mol)= 10.63 g
Therefore, 10.63 grams of ZnO remain after the reaction is complete.
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how do molecules with polar fuctional groups have differently than molecules with nonpolar functional groups
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Molecules with polar functional groups behave differently than those with nonpolar functional groups due to their distinct properties. Polar functional groups contain an unequal distribution of electron density, leading to the presence of partial positive and negative charges. This results in stronger intermolecular forces, such as hydrogen bonding, dipole-dipole interactions, and increased solubility in polar solvents like water.
On the other hand, nonpolar functional groups have an equal distribution of electron density, which means there are no partial charges. These molecules experience weaker intermolecular forces, like van der Waals or London dispersion forces. Consequently, they tend to be less soluble in polar solvents but more soluble in nonpolar solvents, like hydrocarbons.
In summary, the presence of polar or nonpolar functional groups impacts a molecule's properties, including intermolecular forces and solubility in different solvents.
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After completing an experiment, all chemical wastes should be an disposed of according to your instructor’s directions. be left at your lab station for the next class. c dumped in the sink. d taken home.
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Answer:1
Explanation:
Answer: c
Explanation:
Disposed of.... etc.
The following cations and anions in solution are mixed together, one pair at a time Hg+, K+, Al3+ and I-, S2-, CO3 2-Write a net ionic equation for each precipitate that forms, including states
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Hg⁺ with I⁻ forms HgI
Hg⁺ with S²⁻ forms Hg₂S
Hg⁺ with CO₃²⁻ forms Hg₂CO₃
K⁺ with I⁻ forms KI
K⁺ with S²⁻ forms K₂S
K⁺ with CO₃²⁻ forms K₂CO₃
what type of element is [Xe] 4f5
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Answer: element symbol: Eu. Element Atomic Number: 63.
Europium
Europium (Eu), chemical element, a rare-earth metal of the lanthanide series of the periodic table.
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what charge does an atom that has gained electrons have?
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Answer:
I think it's positive charge
Which orbital is portrayed on the right?
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A maximum of two electrons will be placed in 1s first. With a maximum of two electrons, 2s will then be filled. With a maximum of 6 electrons, 2p will then be filled.
What's the appearance of the p orbital?A maximum of two electrons will be placed in 1s first. With a maximum of two electrons, 2s will then be filled. With a maximum of 6 electrons, 2p will then be filled.A maximum of two electrons will be placed in 1s first. With a maximum of two electrons, 2s will then be filled. With a maximum of 6 electrons, 2p will then be filled.Each shell can only carry a certain amount of electrons: the first shell can hold two electrons, the second shell can hold eight electrons (2 + 6) and so on, the third shell can hold 18 electrons (2 + 6 + 10).To learn more about orbital refer to:
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Which is conduction? (1 point)
O energy transfer as electromagnetic waves
O energy transfer by direct contact
O energy transfer by currents of moving liquid or gas
Jm
O energy transfer from a reaction system to its surroundings
Answers
Answer:
Energy transfer by direct contact is conduction.
Explanation:
Conduction is the process of heat or electricity being transferred through a solid material by the movement of molecules. When two objects are in direct contact with each other, heat can be transferred from one object to the other through conduction. This is because the molecules in the hotter object have more energy, and they transfer some of their energy to the molecules in the cooler object through collisions and interactions.
Energy transfer as electromagnetic waves, energy transfer by currents of moving liquid or gas, and energy transfer from a reaction system to its surroundings are all examples of different methods of energy transfer, but they are not conduction.
If you have any question let me know
Energy transfer by direct contact is conduction. Therefore, option B is correct.
Conduction is a mode of energy transfer that occurs through direct contact between objects or substances. When objects or substances with different temperatures come into contact, the hotter object transfers thermal energy to the colder object through conduction.
Conduction refers to the transfer of heat or thermal energy from a region of higher temperature to a region of lower temperature. This transfer occurs when the atoms or molecules of the hotter object collide with those of the colder object, transferring kinetic energy and increasing the motion of the colder object's particles.
As a result, the temperature of the colder object increases, while the temperature of the hotter object decreases until both reach thermal equilibrium.
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a 180-cm3 soil sample was collected three days after a drenching rain when the soil was assumed to be at field capacity (not saturated!). the wet weight of the sample was 274.1 g and after drying overnight in an oven the sample weighed 214.7 g.
Answers
The moisture content of the soil sample is approximately 27.6%. This means that the soil sample contains 27.6% water by weight.
The initial wet weight of the soil sample was 274.1 g. After drying overnight in an oven, the sample weighed 214.7 g. To calculate the moisture content of the soil sample, we can use the following formula:
Moisture Content (%) = (Wet Weight - Dry Weight) / Dry Weight * 100
Substituting the given values into the formula, we have:
Moisture Content (%) = (274.1 g - 214.7 g) / 214.7 g * 100
Simplifying the calculation:
Moisture Content (%) = 59.4 g / 214.7 g * 100
Moisture Content (%) ≈ 27.6%
Therefore, the moisture content of the soil sample is approximately 27.6%. This means that the soil sample contains 27.6% water by weight.
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If Lauren runs a 100 m race in 17.0 seconds, what is her time in minutes and how long does she run in kilometers?
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Answer:
0.283 min.
0.1 km
Explanation:
Since there are 60 seconds in 1 minute, divide the time Lauren ran by 60.
17/60 = 0.283 min.
Since there are 1000 meters in 1 kilometer, divide the distance by 1000.
100/1000 = 0.1 km
How are gnathostomata organized? (cellular, tissue, organs, organ system, or organism
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Gnathostomata are organized at the organism level, as they are a diverse group of jawed vertebrates that includes fish, reptiles, birds, and mammals.
Gnathostomata are organized at the organism level, as they are a diverse group of jawed vertebrates that includes fish, reptiles, birds, and mammals.
While they do have various cellular, tissue, and organ systems, their organization and classification primarily focus on their overall morphology, behavior, and evolutionary relationships.
Gnathostomata are organized at the organism level. They are a group of vertebrates that possess jaws, which distinguishes them from jawless fish like lampreys. As organisms, they have a complex organization consisting of cells, tissues, organs, and organ systems working together to support various functions within the body.
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Has remwhat happens if core body temperature is reached in the scrotum?inants of theca and sertoli cells
Answers
If core body temperature is reached in the scrotum , then the spermatogenesis stops .
What is spermatogenesis ?the process of formation of male gametes( sperms ) is called as spermatogenesis .it occurs in the seminiferous tubule s of the testis .
The germinal epithelium of seminiferous tubules largely consists of cuboidal primary germ cells which give rise to sperms by the process of spermatogenesis .
It occurs in two successive steps : formation of spermatids and formation of spermatozoa .
Formation of spermatids include multiplication phase , growth phase , and maturation phase .
In the second step of spermatogenesis does not involve any division but transformation or metamorphosis of spermatids occur resulting in the formation of sperms or spermatozoa .this process is called as spermiogenesis
One spermatogonium divides twice to form two sperms .un-differentiated diploid primoridal germ cells give rise to haploid sperms .
it plays vital role in organic evolution .
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What happened to the sediment?
Answers
so.. the answer is “ Sediment moves from one place to another through the process of erosion. “
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the vapor pressure of dichloromethane, ch2cl2 , at 0 ∘c is 134 mmhg . the normal boiling point of dichloromethane is 40. ∘c . calculate its molar heat of vaporization.
Answers
Therefore, the molar heat of vaporization of dichloromethane is 31643.7 J/mol (approx). Answer: 31643.7 J/mol
Given, vapor pressure of dichloromethane, CH2Cl2 at 0°C = 134 mm Hg.
The normal boiling point of dichloromethane is 40°C, We need to calculate its molar heat of vaporization.
Molar heat of vaporization is given by the formula:ΔHvap = (2.303RT²/ log P₂/P₁)Where, R = 8.314 J/K.
mol T = Boiling point in Kelvin, P₁ = Vapor pressure at temperature T , B2O = Normal boiling point of the liquid (in Kelvin).
Using the above formula, we can calculate the molar heat of vaporization as follows:
Given the boiling point of dichloromethane = 40°C = 313 K.
Given vapor pressure of dichloromethane = 134 mmHg = 0.177 atm (by converting mmHg to atm).
Using the formula,
ΔHvap = (2.303 × 8.314 × 313² / log (0.177 / 1.000)), ΔHvap = 31643.7 J/mol.
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1. Adrian has a rectangular block with the dimensions 3.5 in by 8.0 in by 5.5
in. If its mass is 435.5 grams, what is its density?
Answers
Answer:
The density of the block is 2.827 grams/ cubic inch
Explanation:
The density of the block can be obtained by dividing the given mass of the block by its volume.
Density = mass / volume
The mass of the block given is 435.5 grams
The volume of the block can be obtained by using the formula:
Volume = Length X breadth X height
Volume = 3.5 X 8 X 5.5 = 154 \(in^3\)
There fore the density will be 435.5 / 154 = 2.827 grams/ cubic inch
Describe and explain two ways to separate a mixture of sulfur powder and sodium nitrate to collect pure samples of each solid.
Answers
Sulfur powder and sodium nitrate can be separated by distillation and dissolution in carbon tetrachloride.
What is distillation?
Distillation is the process of turning a liquid into a vapor, which is then condensed back into a liquid state. The simplest illustration of it is when steam from a kettle condenses into drops of distilled water that are left on a cold surface. Distillation can be used to separate two or more liquids with different boiling points, such as the separation of gasoline, kerosene, and lubricating oil from crude oil, or to separate liquids from nonvolatile solids, as in the separation of alcoholic beverages from fermented materials. Other industrial uses include the desalination of seawater and the processing of chemicals like formaldehyde and phenol.To know more about distillation, click the link given below:
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How many moles are in 7.36 x 1025 molecules of H2O?
Answers
Answer:
There are 122.1982401 moles of H2O in \(7.36*10^{25}\) molecules of H2O
Explanation:
We know,
\(6.023*10^{23}\) molecules of H2O contains 1 mole H2O
1 molecules of H2O contains \(\frac{1}{6.023*10^{23}}\) mole H2O
∴ \(7.36*10^{25}\) molecules of H2O contains \(\frac{1}{6.023*10^{23}}*(7.36*10^{25})\) moles of H2O
= 122.1982401 moles of H2O
∴ There are 122.1982401 moles of H2O in \(7.36*10^{25}\) molecules of H2O