End-of-chapter questionsi Apart from saving money, why is it important to recycle as many substances as possible?2 A farmer uses slaked lime (Ca(oH),) and ammonium sulfate to increase the fertility of his fieldsa What type of soil might the farmer use lime on?b which essential element will ammonium sulfate add to the soil?c What reaction could take place between slaked lime and ammonium sulfate?Lime (Cao) is manufactured from limestone by heating it strongly.d What is the chemical formula oflimestone?48Cambridge IGCSE Chemistry
Answers
2. acidic soil as OH is alkali
3. nitrates (ammonia is nitrogen and hydrogen)
4. I don't know this one sorry
5. CaCO3 is limestone and when it is heated its called thermal decomposition
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What does a 100 lb person weigh on Uranus
"Each value below represents a different aqueous solution at 25 °C. Classify each solution as acidic, basic, or?Are the following acidic, basic or nuetral? pOH=3.37 pOH=11.40 [h+]=3.8x10^-4 [h+]=5.8x10^-8 [OH-]=3.5x10^-12 [OH-]=6.6x10^-3 [h+]=1.0x10^-7 pOh=7 pH=5.11 pH=12.94"
In a very violent reaction called a thermite reaction, aluminum metal reacts with iron (III) oxide to form iron metal and aluminum oxide according to the following equation:
The tetragonal crystal system below possesses how many faces?2 faces 4 faces 6 faces 8 faces
Answers
The alpha decay of Radon-198 produces alpha particle and ¹⁹⁴₈₄Po.
What is alpha decay?
Alpha decay is a type of radioactive disintegration in which some unstable atomic nuclei spontaneously expel an alpha particle to dissipate excess energy.
Alpha decay of Radon-198 is shown as:
¹⁹⁸₈₆Rn → ⁴₂He + ¹⁹⁴₈₄Po
In the above decay from the parent nuclei, daughter nuclei (¹⁹⁴₈₄Po) and alpha particle (⁴₂He) is produced.
Hence daughter nuclei of the alpha decay of Radon-198 is ¹⁹⁴₈₄Po.
To know more about alpha decay, visit the below link:
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The radon is shown on the left, and the alpha particle, which is a helium nucleus, is shown of the right with the polonium.
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Answer: The density of glycerol will be
Explanation:
Density is defined as the mass contained per unit volume.
Given : Mass of glycerol= g
Volume of bromine = 3.25 L=
Putting in the values we get:
Thus density of glycerol will be
The density of glycerol used in cosmetics and soaps is 1.26 g/cm³.
FURTHER EXPLANATION
Density is the measure of the compactness of a material. It is the mass per given volume. This can be expressed mathematically as:
(equation 1)
To solve the problem, we first sort the given in the problem:
mass = 4.10 × 10³ g
volume - 3.25 L
The problem is asking for the density in units of g/cm³ which means that we must first convert the volume from liters to cm³.
Now we can plug in the values of mass and volume into equation 1:
Since the given in the problem both have 3 significant figures, the final answer must also have three significant digits only. Therefore,
The density of glycerol is greater than 1, so when mixed with water it will sink.
LEARN MORE
- Learn more about Displacement Method brainly.com/question/11474085
- Learn more about Liquid Density brainly.com/question/11301218
- Learn more about Dimensional Analysis brainly.com/question/1557970
Keywords: Density, Mass, Volume, Unit Conversion
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When you simply put the flour on a normal scale, you're measuring it's weight because it also included the gravitational pull which make the results larger then the original mass.
The measure the mass of the flour she can either :
- Go to and put it on a normal scale in an area with zero gravity
- or she can use some instrument called "balance scale" , in which she can measure the mass from different altitude and compared it
b)conductivity
c)hardness
d)odor
Answers
Alai is hitting each with a hammer, the physical property which he must be compared the two materials must be hardness.
What is a physical property?
A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, colour, hardness, melting and boiling points, and electrical conductivity.
Alai is hitting each with a hammer, the physical property which he must be compared to the two materials must be hardness.
Solubility can be tested when you put them in a solvent.
Odour can be tested with a smell.
Conductivity can be tested with electricity. Hardness can be tested with its resistance to the force that hits it.
Hence, Alai is comparing hardness.
Learn more about a physical property here:
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Answers
Answer: Aluminum is ideal for aircraft manufacture because it's lightweight and strong.
Explanation:
(2) depletion of atmospheric oxygen
(3) exposure of workers to radiation
(4) exposure of workers to sulfur dioxide
Answers
Answer:
The correct answer is option 3, that is, exposure of workers to radiation.
Explanation:
The process of nuclear fission takes place when uranium nuclei get bombarded with neutrons. This association dissociates the uranium nuclei apart, discharging radiation, heat, and more neutrons. The neutrons, which gets discharged results in a chain reaction as more uranium nuclei get bombarded, generating huge amounts of energy.
The massive concern related to a nuclear power accident is the negative influences of radiation on the human body. If an individual gets exposed to an acute dose of greater levels of radiation, the outcome would be radiation sickness. Radiation sickness is illustrated as illness resulting due to exposure to a large dose of radiation over a brief time duration. The signs may comprise nausea, skin burns, diarrhea, vomiting, general weakness, hair loss, and possibly death.