Answer:
4 is b, 9 is c, 10 is b, 11 is a, 17 is c, 18 is a
Explanation:
I did fossils in science Olympiad
Answer: mass : kg, length: meter, time: second, temperature: Kelvin
Explanation:
Mass is defined as the amount of matter contained in the body.
Its units are kg, gram, milligram which are inter convertible.
S.I or M.K.S system has seven fundamental units which are used to find derived units
1) Mass - Kilogram
2) Length - meter
3) Time - Seconds
4) Electric Current - Ampere
5) Amount of substance - Moles
6) Intensity of light - Candela
7) Temperature - Kelvin
Thus SI base unit of each of these quantities are kg, meter, second, and Kelvin
Answer: The empirical formula is
.
Explanation:
If percentage are given then we are taking total mass is 100 grams.
So, the mass of each element is equal to the percentage given.
Mass of C = 50.69 g
Mass of N= 19.71 g
Mass of H = 7.09 g
Mass of O = 22.51 g
Step 1 : convert given masses into moles.
Moles of C = ![\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{50.69g}{12g/mole}=4.22moles](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7B%20given%20mass%20of%20C%7D%7D%7B%5Ctext%7B%20molar%20mass%20of%20C%7D%7D%3D%20%5Cfrac%7B50.69g%7D%7B12g%2Fmole%7D%3D4.22moles)
Moles of N=![\frac{\text{ given mass of N}}{\text{ molar mass of N}}= \frac{19.71g}{14g/mole}=1.41moles](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7B%20given%20mass%20of%20N%7D%7D%7B%5Ctext%7B%20molar%20mass%20of%20N%7D%7D%3D%20%5Cfrac%7B19.71g%7D%7B14g%2Fmole%7D%3D1.41moles)
Moles of H=![\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{7.09g}{1g/mole}=7.09moles](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7B%20given%20mass%20of%20H%7D%7D%7B%5Ctext%7B%20molar%20mass%20of%20H%7D%7D%3D%20%5Cfrac%7B7.09g%7D%7B1g%2Fmole%7D%3D7.09moles)
Moles of O = ![\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{22.51g}{16g/mole}=1.41moles](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7B%20given%20mass%20of%20O%7D%7D%7B%5Ctext%7B%20molar%20mass%20of%20O%7D%7D%3D%20%5Cfrac%7B22.51g%7D%7B16g%2Fmole%7D%3D1.41moles)
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C =![\frac{4.22}{1.41}=3](https://tex.z-dn.net/?f=%5Cfrac%7B4.22%7D%7B1.41%7D%3D3)
For N = ![\frac{1.41}{1.41}=1](https://tex.z-dn.net/?f=%5Cfrac%7B1.41%7D%7B1.41%7D%3D1)
For H = ![\frac{7.09}{1.41}=5](https://tex.z-dn.net/?f=%5Cfrac%7B7.09%7D%7B1.41%7D%3D5)
For O =![\frac{1.41}{1.41}=1](https://tex.z-dn.net/?f=%5Cfrac%7B1.41%7D%7B1.41%7D%3D1)
The ratio of C:N:H: O = 3:1:5:1
Hence the empirical formula is
.
Factors that influence general adaptation syndrome include that of a person’s health, nutrition, sex, ages, race, socioeconomic status, and genetics. These are factors that are either can precipitate a different reaction, while others are modifiable and unmodifiable traits.
In biology, adaptation has 3 related meanings. Firstly, it is the dynamic evolutionary process that fits organisms to their environment, enhancing their evolutionary fitness. Secondly, it is a state reached by the population during that process. Thirdly, it is a phenotypic trait or adaptive trait, with a functional role in each organism, that is maintained and has evolved through natural selection. Historically, adaptation has been described from the time of the ancient Greek philosophers such as Empedocles and Aristotle. In 18th and 19th century natural theology, adaptation was taken as evidence for the existence of a deity. Charles Darwin proposed instead that it was explained by natural selection. Adaptation is related to biological fitness, which governs the rate of evolution as measured by a change in gene frequencies. Often, two or more species co-adapt and co-evolve as they develop adaptations that interlock with those of the other species, such as with flowering plants and pollinating insects. In mimicry, species evolve to resemble other species; in Müllerian mimicry, this is a mutually beneficial co-evolution as each of a group of strongly defended species (such as wasps able to sting) come to advertise their defenses in the same way. Features evolved for one purpose may be co-opted for a different one, as when the insulating feathers of dinosaurs were co-opted for bird flight. Adaptation is a major topic in the philosophy of biology, as it concerns function and purpose (teleology). Some biologists try to avoid terms that imply purpose in adaptation, not least because it suggests a deity's intentions, but others note that adaptation is necessarily purposeful.