A vector always consists of
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When a nonmetal bonds with a nonmetal, they form a(n) _______________
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How many grams of CuSO4 are there in 100.0 g of hydrate? How many moles?
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Eventhough it is very effective, producing a mass number of a single organism in an Area will risk of endangering the existence of a specific nutrient ( because that large number of organism is basically eating the same thing)
which lead to societal decision such as the founding of The Livestock conservancy, or other environmental protection organization
People could choose to practice organic farming, heirloom plants, or use GMOs.Governments could pass laws to limit the use of monoculture farming or require people to use alternate farming methods.
b. secondary succession has soil
c. primary succession has soil
d. primary succession has water
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Answer: Conduction, radiation and convection all play a role in moving heat between Earth's surface and the atmosphere. Since air is a poor conductor, most energy transfer by conduction occurs right near Earth's surface. ... During the day, sunlight heats the ground, which in turn heats the air directly above it via conduction.
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B) Mg with 14 neutrons
C) Fe with 26 neutrons
D) Ti with 26 neutrons
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The correct answer is option B: Mg with 14 neutrons
The mass spectrum shows the charge to mass ratio of atoms. I can be used to sort the isotopes of an element.
Isotopy is a phenomenon in which atoms of the same element have the same atomic number but different mass numbers.
The mass spectrum of atoms separates atoms on the basis of charge to mass ratio of the isotopes.
The isotopes of magnesium are; 24Mg atom which has 12 neutrons 25Mg which has 13 neutrons, and 26Mg which has 14 neutrons.
Hence, the peak at 26amu represents 26Mg which has 14 neutrons.
Answer:
The answer is B
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Taking into account the definition of molarity, you would measure out 72.732 g of K₂SO₄ to prepare 550 ml of a 0.76 M solution.
Definition of molarity
Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
Molarity is expressed in units.
Mass of K₂SO₄
In this case, you prepare 550 ml of a 0.76 M solution. This is, you know:
- Molarity= 0.76 M
- number of moles= ?
- volume= 550 mL= 0.550 L
Replacing in the definition of molarity:
Solving:
number of moles= 0.76 M × 0.550 L
number of moles= 0.418 moles
Being the molar mass of K₂SO₄ 174 , that is, the amount of mass that the compound contains in one mole, the mass contained in 0.418 moles is calculated as:
0.418 moles×174 = 72.732 g
Finally, you would measure out 72.732 g of K₂SO₄ to prepare 550 ml of a 0.76 M solution.
Learn more about molarity:
Answer:
Explanation:
Hello,
In this case, by considering that the both the volume of the solution of potassium sulfate and its concentration are given, one solves for the required mass considering the following proportional factors related stoichiometrically:
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