Answer:
When calcium oxide (chemical formula: CaO) reacts with water (chemical formula: H
2
O), the following reaction takes place:
CaO+H
2
O→Ca(OH)
2
he product of this reaction is calcium hydroxide, also known as slaked lime.
Thus, when calcium oxide reacts with water, slaked lime is produced.
Calcium oxide is also known as lime and is most commonly used for many purposes. It can be used for pH correction of water or for its disinfection (with excess lime). More importantly, lime has been used for a very long time to produce calcium carbonate by reaction with carbon dioxide. Calcium carbonate has been used as mortar for sealing the gaps between bricks, stones, etc.
The reaction for the production of calcium carbonate is:
CaO+CO
2
→CaCO
3
In reality the reaction is a two-step process, with formation of slaked lime in the first step and reaction of slaked lime with carbon dioxide to form calcium carbonate in the second.
Explanation:
How are the environments of a desert and a tundra different?
A. A tundra is at a higher latitude than a desert.
B. A tundra is less humid than a desert.
C. A tundra is much warmer than a desert.
D. A tundra receives less precipitation than a desert.
How are the cations different in each type of binary compound?
Answer:
In Type 1 cations, the compounds are named after their parent atom. Type 2 binary compounds the cation have a Roman numeral that indicates the charge as well as the name of its parent atom.
A man riding a skate board with a combined mass of 50 kg traveling at 10 m/s/
Espanola so hence 5000 sernda 50 multiplias 10
What type of reaction is this? CH4 + O2>CO2+ H2O
Answer:
methane or octane is exothermic
The ph of a solution prepared by the addition of 10. Ml of 0. 002 m koh(aq) to 10. Ml of distilled water is closest to.
This problem is asking for the for pH when a solution of potassium hydroxide is diluted to the double of its initial volume. Thus, the answer turns out to be 11.0.
pH calculationsIn chemistry, pH calculations are performed based on the following equation relating the pH and the concentration of hydrogen ions in the solution:
[tex]pH=-log([H^+])[/tex]
However, since this problem involves a strong base, KOH as potassium hydroxide, one must calculate the pOH instead, and then convert it to pH with the following equations:
[tex]pOH=-log([OH^-])\\\\pH=14-pOH[/tex]
In addition, due to the fact it is diluted from 10. mL to 20. mL (with the 10. mL of added distilled water), one needs to use the dilution equation in order to calculate the correct concentration of KOH:
[tex]M_1V_1=M_2V_2\\\\M_2=\frac{M_1V_1}{V_2} \\\\M_2=\frac{0.002M*10.mL}{20.mL}\\ \\M_2=0.001M[/tex]
Hence, the pOH turns out to be:
[tex]pOH=-log(0.001)=3.0[/tex]
And thereby the pH:
[tex]pH=14-3.0\\\\pH=11.0[/tex]
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How can we distinguish between ethylene and acetylene chemically?
Answer:
The key difference between acetylene and ethylene is that acetylene has a triple bond between two carbon atoms whereas ethylene has a double bond between two carbon atoms. The names acetylene and ethylene sound similar, but they are different hydrocarbon compounds.Both ethylene and acetylene are hydrocarbons but the former has a carbon to carbon double bond while the latter has a carbon to carbon triple bond.
Ethylene and acetyleneBoth organic compounds are referred to as hydrocarbons.
They are also both unsaturated.
Ethylene contains a C-C double bond and belongs to the alkene group.
Acetylene contains a C-C triple bond and belongs to the alkyne group.
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What does this dialogue reveal about Paul’s feelings toward Ole Grey?
He has a deep fear of the horse, so he is cautious in his approach.
He is worried that the horse will not listen to him during the race.
He has a deep respect for the horse, so he treats him with care.
He is more concerned with winning than with the horse’s well-being.
Answer:
He has a deep respect for the horse,so he treats him with care
Answer:
It's C
Explanation:
Good luck on the test.
In what form does the sun's energy arrive on Earth?The physical characteristics of two large predatory animal species are shown in the table below.
Physical Characteristics
Species Characteristics
X Short canine teeth, small prey size
Y 1-foot-long canine teeth, large prey size
Which species will most likely survive if the prey population in the area decreases?
Species X because it is difficult to bring down a small prey
Species X because short canines are less likely to break
Species Y because long canines are less likely to break
Species Y because it is easy to bring down a large prey
Answer:
radiation B species x because short canines are less likely to break.
How is atmospheric oxygen linked to the carbon cycle?.
Atmospheric oxygen is closely linked to the carbon cycle through the process of photosynthesis and respiration.
During photosynthesis, plants and other photosynthetic organisms use carbon dioxide (CO₂) from the atmosphere, along with sunlight and water, to produce glucose (C₆H₁₂O₆) and oxygen (O₂) as a byproduct. This process removes carbon dioxide from the atmosphere and releases oxygen, contributing to the oxygen content in the atmosphere.
On the other hand, during respiration, organisms, including plants, animals, and microorganisms, use oxygen from the atmosphere to break down glucose and release carbon dioxide as a waste product. This process releases carbon dioxide into the atmosphere and consumes oxygen.
Hence, the atmospheric oxygen is linked to the carbon cycle.
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At what point is meteoroid concerned a meteorite
Answer:
When meteoroids enter Earth’s atmosphere (or that of another planet, like Mars) at high speed and burn up, the fireballs or “shooting stars” are called meteors. When a meteoroid survives a trip through the atmosphere and hits the ground, it’s called a meteorite. Go farther.
Explanation:
Explanation:
Itenerary for 12 day Eastern Cape
Please help
what are the 6 main points of the kinetic molecular theory
Answer:The kinetic-molecular theory of gases assumes that ideal gas molecules (1) are constantly moving; (2) have negligible volume; (3) have negligible intermolecular forces; (4) undergo perfectly elastic collisions; and (5) have an average kinetic energy proportional to the ideal gas's absolute temperature.
Explanation:
Which of the following is not conserved in a chemical reaction?
A) number of grams
B) number of atoms
C) number of molecules
D) actually, all three of these are conserved
A chemical reaction is a product formation through the reactants. In a reaction the number of atoms, molecules, and mass are conserved. Thus, option D is correct.
What is a chemical reaction?A chemical reaction involves a reactant on the left side of the reaction equation that changes to produce reactants. In a reaction, the conservational law of mass is always followed.
The number of atoms and the molecules involved in a reaction is also the same in the reactants and the products formed as can be seen from the stoichiometry coefficient of the balanced equation.
Therefore, option D. mass, atoms, and molecules are conserved in a reaction.
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Whats Fe2O3 compound name
Answer:
Iron(III) oxide and its common name is Ferric Oxide
Explanation:
Write an equation that represents the second ionization energy of nickel.
The equation that represents the second ionization energy of nickel is [tex]\rm Ni+ (g) \rightarrow Ni^2^+ (g) + e-.[/tex]
What is the second ionization energy?The energy needed to free the outermost, or least bound, an electron from an element's 1+ ion is known as the second ionization energy.
The second ionization energy of an element is usually greater than the first because positive charge more strongly attracts electrons than negative charge.
The chemical equation is the representation of the chemical reaction. The left side of the substance and compound is the reactant and the right side of the substance is the product.
Nickel is a chemical element. Its chemical symbol is Ni. Its atomic number is 28. It's a silvery luster metal.
Therefore, the equation is [tex]\rm Ni+ (g) \rightarrow Ni^2^+ (g) + e-.[/tex]
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50 POINTS HELP WITH EXPLAINTION (PREFEREED BUT NOT NEEDED )
My observations supported that cold water is (A)____________________ than warm water and so it (B)_________________________ of warm water.
Question 3 options:
(a) more dense (b) sinks to the bottom
(a) less dense (b) sinks to the bottom
(a) less dense (b) rises to the top
(a) more dense (b) rises to the top
Question 4 (1 point)
Fresh water is always (A)_____________________ than salt water so it (B)____________________ the salt water.
Question 4 options:
(a) less dense (b) rises above
(a) more dense (b) sinks below
Answer:
3. (a) more dense (b) sinks to the bottom
4. (a) less dense (b) rises above
Explanation:
To understand this, first you need to know what density is. Density is the quantity of mass per unit. If something is dense it has many molecules per unit of volume. If something is not so dense it has few molecules per unit of volume.
Cold water is close to becoming ice. In ice (solid), the molecules are compacted very tightly, therefore there are more molecules per unit of volume. This means that ice is very dense. In cold water, the molecules are close but not as close as in ice. This means that cold water is dense.
Hot water is close to becoming a water vapour. In water vapour (gas) the molecules are spaced very far apart and move around freely. They have lots of energy so they vibrate and move around a lot. There are less molecules per unit of volume in water vapour. This means that water vapour is not dense. In hot water, the molecules are not so far apart as the molecules in water vapour. This means that hot water is not so dense. But it is still considerably denser.
Salt water has two different types of molecules. The salt molecules like to cluster around the water molecules very close together. This makes salt water more dense than just plain water (freshwater).
What is the cas registery number for sodium hypochlorite? enter the number including dashes, for example xxx-xx-x or xx-xxx-xx, depending on how many digits are in each of the three sections.
Answer:
7681-52-9
Explanation:
i looked it up
10) Nitrogen and hydrogen react together to form ammonia.
N, + 3H
2NH
When completely converted, 7 tonnes of nitrogen gives 8.5 tonnes of
ammonia
How much nitrogen will be needed to produce 34 tonnes of
ammonia?
7 tonnes
8.5 tonnes
Ο Ο Ο
28 tonnes
34 tonnes
Answer:
C 28 tonnesExplanation
7 tonnes-8.5 ammonia
1 ton will be 8.5/7=1.21
we now know what 1 ton of nitrogen is equal to
so now,34/28 that is equal to 1.21
1.21=1.21
So the answer would be C. 28 tonnes
Thanks!
Answered by: FieryAnswererGT
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I need help with this bill nye worksheet. someone help. It's due tomorrow cant mess my grade up. I just picked a random subject but it's science.(7th grade)
send a better picture please and thank you
sceince problem i need help
1. A car has a mass of 4000 kg. What force is required to make the car accelerate at 20 mss
Answer:
As Per Given Information
Mass of Car 4000 Kg
Acceleration of car 20m/s²
we have to find the force required to make the car car accelerate at given magnitude .
Using Formulae
Force = Mass × AccelerationOn Putting the value we obtain
↝ Force = 4000 × 20
↝ Force = 80000 N
↝ Force = 80KN
So, the force required to maintain the given acceleration is 80 KiloNewton .
explain how both hydrogen and carbon have achieved stability by bonding with each other to form methane
A carbon iota can bond with four other iotas and is just like the four-hole wheel, whereas an oxygen iota, which can bond only to two, is just like the two-hole wheel.
Each element tries to achieve stability by forming a noble gas configuration (2 or 8 valence electrons)
Carbon has 4 valence electrons, achieving stability requires 4 more electrons
Hydrogen has 1 valence electron, achieving stability requires 1 more electron
Carbon and hydrogen bond covalently by sharing their electrons so that they become stable (carbon binds 4 hydrogens) to form CH₄ (methane)
N2 + 3H2 - 2NH3
-
If 150.0 grams of ammonia were produced how many moles of N2 would be needed?
PLEASEEEE HELPPPPPPPP
The number of mole of nitrogen gas, N₂, needed to produce 150 g of ammonia, NH₃ is 4.41 moles
How to determine the mole of NH₃ produced Mass of NH₃ = 150 gMolar mass of NH₃ = 14 + (3×1) = 17 g/mol Mole of NH₃ =?Mole = mass /molar mass
Mole of NH₃ = 150 / 17
Mole of NH₃ = 8.82 moles
How to determine the mole of N₂ neededBalanced equation
N₂ + 3H₂ —> 2NH₃
From the balanced equation above,
2 moles of NH₃ were produced by 1 mole of N₂.
Therefore,
8.82 moles of NH₃ will be produced by = 8.82 / 2 = 4.41 moles of N₂.
Thus, 4.41 moles of N₂ is needed for the reaction.
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How is a spectroscope used in astronomy?
Explanation:
using a spectroscope astronomers can split light from space into a spectrum and examine its spectral lines to infer what compounds are emitted or absorbed.
How many laws are there of thermodynamics?
Answer:
3
Explanation:
thermodynamics has three fundamental laws
1st Law of Thermodynamics - Energy cannot be created or destroyed.
2nd Law of Thermodynamics - For a spontaneous process, the entropy of the universe increases.
3rd Law of Thermodynamics - A perfect crystal at zero Kelvin has zero entropy.
According to the electron configuration, which atom will be the most reactive?
A) 1s^2 2s^2
B) 1s^2 2s^2 2p^6 3s^2
C) 1s^2 2s^2 2p^6 3s^2 3p^6
D) 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2
Which supplement will do more for regulating bowel function? Justify.
Constipation is commonly treated with fiber supplements. Wheat bran, for example, is an insoluble fiber supplement that helps stimulate the mucosal membrane of your colon. They soften your stool and reduce the time it takes for feces to pass through your colon by doing so.
Incontinence or diarrhea advice:
Foods that irritate the stomach and induce loose stools should be avoided (especially caffeine, dairy, and alcohol).
Stay hydrated by drinking plenty of water or electrolyte-containing drinks.
To bulk up your stool, increase your fiber intake.
Constipation remedies
At least 25 to 31 grams of fiber Trusted Source should be consumed each day.
Increase your degree of physical exercise.
When you have the desire to go, go to the restroom instead of trying to hold it in.
Which of the following correctly gives the best coefficients for the reaction below? W N2H4 + H202 + N2 + H 20 a.1,1,1,1 b.1,2, 1,4 c.2, 4, 2,8 d.1, 4, 1, 4 e.2, 4, 2, 4
The correct coefficients for the chemical reaction between hydrazine and hydrogen peroxide is 1, 2, 1, 4 (option B).
What are coefficients in chemical reaction?Coefficients in a chemical reaction are numbers placed in front of formulas to balance equations.
A chemical equation is balanced when the number of atoms of each element on both sides of the equation are the same.
According to this question, hydrazine reacts with hydrogen peroxide to form nitrogen gas and water as follows:
N₂H₄ + 2H₂O₂ → N₂ + 4H₂O
As observed in the above chemical equation, the correct coefficients for the chemical reaction from left to right is 1, 2, 1, 4.
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is the ability of a substance to reflect light a chemical property
Answer:
If it reflects all light, it looks white. Color can help identify a material and, while it is a physical property, it can be used together with chemical experiments when the experiments produce a known material with a specific color.
Explanation:
The ability to reflect light is the inherent and fundamental property of that substance.
What type of object reflects light?When waves of light (and other electromagnetic radiation) come into contact with a surface or other boundary that does not absorb the radiation's energy, the waves bounce off the surface and back into space. The light wave that is coming in is known as the incident wave, and the wave that is being reflected off of the surface is known as the reflected wave. As seen for the operation of a flashlight beam on a smooth, flat mirror, visible white light that is focused onto the surface of a mirror at an angle (incident) is reflected back into space by the mirror surface at another angle (reflected) that is equal to the incident angle.For visible light and all other wavelengths of the electromagnetic radiation spectrum, the angle of incidence is the same as the angle of reflection. This idea is frequently referred to as the Law of Reflection. It is significant to notice that because the light is not "bent" or refracted and is being reflected at all wavelengths equally, it is not broken up into its individual hues. Practically all surfaces will reflect light to some extent, particularly smooth surfaces, like a glass mirror or polished metal, work best for doing so.To learn more about reflective objects, refer to
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how many moles are in 7.1x10^21 atoms of iron?
Answer:
0.011 moles
Explanation:
There are about 6.02*10^23 atoms in a mole, so in the given sample, there are
[tex] \frac{7.01 \times {10}^{21} }{6.02 \times {10}^{23} } [/tex]
which is about 0.011 moles.
If he has an excess of ammonium sulfide and 125.0 mL of a 1.51 M solution of Al(NO3)3, how many
grams of aluminum sulfide can he make?
The mass of the aluminum sulfide, Al₂S₃, that can be produced from the reaction is 14.16 g
How to determine the mole of Al(NO₃)₃Volume = 125 mL = 125 / 1000 = 0.125 L Molarity of Al(NO₃)₃ = 1.51 MMole of Al(NO₃)₃ =?
Mole = Molarity x Volume
Mole of Al(NO₃)₃ = 1.51 × 0.125
Mole of Al(NO₃)₃ = 0.18875 mole
How to determine the mole of Al₂S₃ producedBalanced equation
2Al(NO₃)₃ + 3(NH₄)₂S → Al₂S₃ + 6NH₄NO₃
From the balanced equation above,
2 moles of Al(NO₃)₃ reacted to produce 1 mole of Al₂S₃
Therefore,
0.18875 mole of Al(NO₃)₃ will react to produce = 0.18875 / 2 = 0.094375 mole of Al₂S₃
How to determine the mass of Al₂S₃ produced Mole of Al₂S₃ = 0.094375 moleMolar mass of Al₂S₃ = (27×2) +(32×3) = 150 g/mol Mass of Al₂S₃ =?Mass = mole × molar mass
Mass of Al₂S₃ = 0.094375 × 150
Mass of Al₂S₃ = 14.16 g
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