What does soil have to do with rock
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I need help! Complete the equation iron+hydrochloric acid ----- ____________+____________
What experiment did j.j. thomson do ?
What causes genetic variation in a population
What must occur before clouds can form?
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sodium chloride is a compound that is stable because its constituent elements namely chlorine and sodium have formed ionic bonds with each other and their outer energy shells are filled with 8 electrons.
Sodium on its own has 11 electrons. Two of these are in the 1st energy level, eight in the 2nd energy level and one in the 3rd energy level. This arrangement is highly unstable rendering the element sodium highly unstable and reactive. It will burst into flames immediately on exposure to air and can burn through human flesh if it comes into contact with it.
Chlorine at room temperature is a poisonous gas. It has 17 electrons in the arrangement 2:8:7 . The outermost shell has 7 electrons and so this element is fairly stable but will readily react with human lungs with fatal consequences.
So each of these two elements on their own are deadly, but when the two react together, sodium gives up its single electron on the outer energy shell to chlorine which readily accepts it and fills its outer shell to make 8 forming ionic bonds and is thus the two are completely stable and cannot explode or react in any other way because the outer shell of each of them is now filled with 8 electrons.
Valuable ore deposits and gem crystals are often associated with _____. a. oceans b.oil deposits c. thin crustal areas d. igneous intrusions Which of the following shows a possible sequence that leads to the formation of sedimentary rocks? a. squeezing, heating, bending, folding b. rising, weathering, erosion c. weathering deposition, compaction, cementation d. melting, cooling, crystallization PLZ HELP!! :)
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Valuable ore deposits and gem crystals are often associated with igneous intrusions. So for this question the correct option is option “d”. An example like the Pegmatite’s, which are a form of igneous intrusions, is responsible for the creation of variety of gems like topaz and tourmaline.
For the second question:
For this specific question, option “c” seems to be the correct option. Weathering, deposition, compaction, cementation are the possible sequence that leads to the formation of sedimentary rocks.
Valuable ore deposits and gem crystals are often associated with igneous intrusions and The possible sequence that leads to the formation of sedimentary rocks is weathering, deposition, compaction, cementation. Thus, the correct options are option D and C.
Sedimentary rocks are types of rocks that are formed through the accumulation and lithification (compaction and cementation) of sediment particles. Sediments can include fragments of rocks, minerals, organic material, and other debris that are transported and deposited by water, wind, ice, or gravity.
Over time, these sediments undergo compaction and cementation processes, where the particles are pressed together and bound by minerals, creating solid rock formations. Sedimentary rocks often exhibit distinct layers or stratification, and they can contain fossils and provide valuable information about Earth's history and past environments.
Examples of sedimentary rocks include sandstone, limestone, shale, and conglomerate.
Learn more about Sedimentary rocks, here:
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Answer : The new volume of the air is, 6.83 L
Explanation :
Charles' Law : It states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.
Mathematically,
where,
are the initial volume and temperature of the gas.
are the final volume and temperature of the gas.
We are given:
Putting values in above equation, we get:
Therefore, the new volume of the air is, 6.83 L
Why are dichotomous keys useful in classifying a new species?
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Answer:
By comparing the traits of other species to that of an undefined species. Even if it is a new species, it can be classified under a specific species type through dichotomous keys.
A. The volume of the substance depends on the
container it is in.
B. Volume of the substance changes depending on its
location.
C. The shape of the substance changes often.
D. The shape of the substance is fixed and volume is
constant.
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Answer:
D
Explanation:
depending on the solid the shape will not change.
B. Killing cancerous cells
C. The transmutation of hydrogen into helium
D. Detecting art forgeries
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Detecting art forgeries is one common use of neutron activation analysis. Hence, option D is correct.
What is neutron activation analysis?
NAA is a non-destructive analytical technique that can be used to determine the elemental composition of a sample.
It is particularly useful for the analysis of trace elements, as it is highly sensitive and can detect even very small amounts of elements.
In the field of art conservation, NAA is used to analyze the composition of pigments and other materials used in artworks, which can help to authenticate or identify forgeries.
Neutron activation analysis is a highly versatile and powerful analytical technique that can provide valuable insights into the elemental composition of a wide range of samples. Its sensitivity and accuracy make it an important tool in many scientific fields, including art conservation.
Thus, option D is correct.
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