Which of the following is not an example of a mineral crystal shape?a. Kryptonite
b. Pyrite
c. Quartz
d. Calcite
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Answer: a. Kryptonite
Related Questions
The elements in each column have ___________
when you check a toaster with a digital or analog video in which one of the following indicates dirty contacts on the thermostat blade
In Dna, guanine always forms hydrogen bonds with?
Select the correct answer.John is riding a ski lift to the top of Wildcat Mountain. He removes his gloves and rapidly rubs his hands together to warm them up. Whathappens when John rubs his hands?O A. The skin on his hands rapidly conducts heat, similar to metal.O B. He traps heat between his hands because skin is an insulator. ISO C. The particles In his hands vibrate faster because of friction.O D. Thermal energy moves from his fingertips to his palms.O E. He simulates a fever that'll raise his core body temperature.
B. 8
C. 3
D. 4
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B. The amount of energy that is absorbed is the same as the amount of energy that is released.
C. The amount of energy that is absorbed is less than the amount of energy that is released.
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The concentration of gallium in kilograms per cubic meter is equal to the calculated mass of gallium per cubic meter.
To determine the concentration of gallium in kilograms per cubic meter, we need to convert the concentration from atomic percent (at%) to kilograms per cubic meter.
The atomic fraction is the ratio of the number of gallium atoms to the total number of atoms in the silicon-gallium mixture.
We need to know the atomic masses of gallium and silicon. The atomic mass of gallium is 69.72 g/mol, and the atomic mass of silicon is 28.09 g/mol.
The atomic fraction of gallium can be calculated using the formula:
Atomic fraction of gallium = (Concentration of gallium in at%) / (Atomic mass of gallium) / [(Concentration of gallium in at%) / (Atomic mass of gallium) + (Concentration of silicon in at%) / (Atomic mass of silicon)]
Plugging in the given values:
Atomic fraction of gallium = (%) / (69.72 g/mol) / [(
at%) / (69.72 g/mol) + (100 -
) at% / (28.09 g/mol)]
Now, let's convert the atomic fraction to the number of gallium atoms per cubic meter. We can use Avogadro's number, to make this conversion.
Number of gallium atoms per cubic meter = Atomic fraction of gallium × Avogadro's number.
Mass of gallium per cubic meter = Number of gallium atoms per cubic meter × (Atomic mass of gallium / 1000)
Therefore, the concentration of gallium in kilograms per cubic meter is equal to the calculated mass of gallium per cubic meter.
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Final answer:
The concentration of gallium in kilograms per cubic meter can be calculated using the atomic mass of gallium and Avogadro's number.
Explanation:
To calculate the concentration of gallium in kilograms per cubic meter, we can use the atomic mass of gallium and Avogadro's number. The concentration in kilograms per cubic meter can be found using the formula:
Concentration (kg/m³) = Concentration (% by mass) x Density (g/cm³) x Atomic Mass (g/mol) / 1000 x Avogadro's Number
First, convert the concentration from at% (atomic percent) to % by mass. Since gallium has an atomic mass of 69.7 g/mol, we can use this value to find the concentration in kilograms per cubic meter.
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Joseph Proust
Ernest Rutherford
J. J. Thomson
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Answer:
J.J. Thomson
Explanation:
Answer:
D
Explanation:
took the test
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To know the end point we use phenolphthalein as indicator. Therefore, endpoint is point in which indicator change the color, and equivalence point is point in which there is equal amount of two chemicals.
What is titration?
Titration is a technique by which we know the concentration of unknown solution using titration of this solution with solution whose concentration is known. To know the end point we use phenolphthalein as indicator. End point is a point where completion of reaction happen.
Endpoint is point in which indicator change the color, and equivalence point is point in which there is equal amount of two chemicals. Endpoint is after Equivalence point.
Therefore, endpoint is point in which indicator change the color, and equivalence point is point in which there is equal amount of two chemicals.
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Answer:
Endpoint is point in which indicator change the color, and equivalence point is point in which there is equal amount of two chemicals. Endpoint is after Equivalence point.
Explanation: