If you determined that the volume of a silver bar is 100.mL,how many atoms of silver would be in the bar? The density of silver is 10.5g/mL. 271
Answers
There are approximately of silver in the 100 mL silver bar.
To determine the number of atoms in a silver bar, you can follow these steps:
Calculate the mass of the silver bar:
Mass (g) = Volume (mL) x Density (g/mL)
Mass = 100 mL x 10.5 g/mL = 1050 g
Calculate the molar mass of silver (Ag):
The molar mass of silver (Ag) is approximately 107.87 g/mol.
Calculate the number of moles of silver in the bar:
Moles = Mass (g) / Molar Mass (g/mol)
Moles = 1050 g / 107.87 g/mol ≈ 9.73 moles
Calculate Avogadro's number:
Avogadro's number is approximately
Calculate the number of silver atoms in the bar:
Number of atoms = Moles x Avogadro's number
Number of atoms =
Thus, there are approximately of silver in the 100 mL silver bar.
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1050 g silver * ( 1 mol silver/107.8682g) = 9.734 mol silver
9.734 moles silver * 6.022E23 atoms/ mole = 5.861E24 atoms of silver
Where molar mass if silver = 107.8682g/mol
Avogadro's number = 6.022E23 atoms/moles
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Answers
Option A. salt flat is the correct answer. A halophile is most likely to be found in a salt flat, as it aligns with the habitat where halophiles are most commonly found due to their ability to thrive in high-salinity conditions.
Halophiles are organisms that thrive in environments with high salt concentrations. Salt flats, also known as salt pans or salt deserts, are large expanses of flat land covered with salt and other minerals. These areas typically form in arid or semi-arid regions where water evaporates, leaving behind concentrated salt deposits.
Salt flats are characterized by their stark, white appearance due to the accumulation of salt crystals on the surface. The high salt content makes these areas inhospitable to many other forms of life, but halophiles have evolved unique mechanisms to tolerate and even benefit from the high salt concentrations.
Learn more about halophile here:
Final answer:
A halophile can be found in salt flats, ocean floors, swamps or marshes, and hydrothermal vents.
Explanation:
Halophiles are organisms that can be found in highly saline environments. They have adapted to survive in areas with high salt concentrations. Some of the locations where halophiles can be found include:
- Salt flats: These are areas where water evaporates, leaving behind a high concentration of salt. Halophiles are able to survive in these extreme conditions.
- Ocean floors: Certain areas of the ocean, such as saltwater lakes or lagoons, have high salt concentrations. Halophiles have adapted to live in these environments.
- Swamps or marshes: These areas may have high salt content due to the presence of saltwater or brackish water. Halophiles can thrive in these habitats.
- Hydrothermal vents: These are underwater geysers that release hot, mineral-rich water. Some hydrothermal vents have high salt concentrations, providing a suitable habitat for halophiles.
Halophiles have unique mechanisms to cope with the osmotic stress caused by the high salt content. They may have specialized enzymes and transport proteins that allow them to maintain proper cellular function in these extreme conditions.
Halophiles play an important role in the ecosystem by contributing to nutrient cycling and serving as a food source for other organisms.
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b. created models of the internal structure of atoms
c. used experiments to analyze the relationship between gas pressure and volume
d. developed practical equipment, new procedures, and methods of identifying unknown substances
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Although they were interested in mysticism, there was no place for it in science and they did not explain it in such manners. They also did not create models and didn't deal with gas pressure and volume. They mostly tried to change chemical properties of one chemical into another.
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Brahe- known for his precise and comprehensive astronomical and planetary observations, which heavily influenced future discoveries; built the maps of Hven that helps in accurate determinations of latitude and longitude.
Kepler - solved the mystery of the planets; believed the Solar System's planets orbited the sun in circular path that determined by an arrangement of the five platonic solids.
Galileo - Father of Modern Science; discovered the first moons ever known to orbit a planet other than Earth; first person to study the sky with a telescope; discovered the rings of Saturn; our moon has mountains; Milky Way is made up of stars; established that everything falls to the ground at the same rate regardless of weight; identified the parabola; proposed theory of relativity; discovered pendulums; tried to measure the speed of light; showed the set of perfect squares.
Newton- generalized the binomial theorem; showed sunlight is made up of all the colors of the rainbow; discovered the law of gravitation; Laws of motion and calculus.
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A. ∆G=negative, ∆H= positive, ∆S= positive, T = large
B. ∆G=positive, ∆H= positive, ∆S= positive, T = large
C. ∆G=negative, ∆H= negative, ∆S= positive, T = large
D. ∆G=negative, ∆H= positive, ∆S= negative, T = large
E. ∆G=positive, ∆H= positive, ∆S= negative, T = large
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b. compression only
c. compression and rarefaction
d. compression, rarefaction, and triangulation
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Longitudinal wave has two features which include:
A compression-- the part of the wave which is pressed together.
A rarefaction-- the part of the wave that is the most spread apart.
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Answer: K only has 1 valence electron. It will leave with only a little effort, leaving behind a positively charged K^+1 atom.
Explanation: A neutral potassium atom has 19 total electrons. But only 1 of them is in potassium's valence shell. Valence shell means the outermost s and p orbitals. Potasium's electron configuration is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1. The 4s orbital is the only orbital in the 4th energy level. So it has a valency of 1. This means this electron will be the most likely to leave, since it is the lone electron in the oyutermost energy level (4). When that electron leaves, the charge on the atom go up by 1. The atom now has a full valence shell of 3s^2 3p^6, the same as argon, Ar.