As a sample of matter is cooled, its particles
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Commercial fertilizers, which are made by humans, are used to enrich soil for healthier crops. However, erosion may carry the fertilizer chemicals to the oceans. The presence of these chemicals may cause certain kinds of algae to reproduce rapidly. This decreases the amount of oxygen in the water, which can cause organisms that depend on it, like fish, to die.Which statements describe the impact of the use of fertilizers? Select two options.It improves the growth of crops.It provides more food for fish.It causes erosion and washes away soil.It causes the death of crops.It harms organisms that live in the oceans.
Nuclear fission produces about one-fifth the power in the United States. An unintended positive consequences of nuclear power has been that A) a lot of power is generated. B) radioactive waste is created. C) less greenhouse gases are created. D) nuclear power plants are targets for terrorists.
Which substance cannot be broken down by a chemical change?1) ammonia2) ethanol3) propanol4) zirconium
When she told us the party was canceled there was a deafening silence? A. Malapropisms B.imagery C. Hyperbole D.oxymoron
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out of the options, Kr is the largest atom and it contains more energy cells than the others, which make the fluorine more attracted to the Kr Nucleus
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Final answer:
Among He, Ne, Ar, and Kr, krypton (Kr) would be most likely to form a compound with fluorine. It's one of the heavier noble gases, which can form compounds with highly reactive elements like fluorine due to their slightly less firm hold on outermost electrons.
Explanation:
The elements in Group 18 are noble gases: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). These gases are known for their low reactivity because they have fully filled valence shells. However, the three heaviest noble gases - krypton, xenon, and radon - can react with fluorine to form fluorides, with xenon fluorides being the most well-researched among other noble gas compounds.
Among the options provided (He, Ne, Ar, Kr), krypton (Kr) would be the most likely to form a compound with fluorine. This is due to krypton's bigger size as it descends the periodic table, which slightly decreases the grip on its outermost electrons, making it marginally more likely to react with extremely reactive elements like fluorine.
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b.)ICl experiences dipole0dipole interactions.
c.)Br2 forms hydrogen bonds.
d.)ICl experiences induced dipole0induced dipole interactions.
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The liters of sea water must evaporate to produce 5.00 moles of magnesium hydroxide - 78.8 litres.
A mole is a special unit of quantity of a chemical species that contains exactly Avogadro's number of particles.
- The mass of one mole of an element or a compound, called the molar mass, can be found from a periodic table.
- The unit of molar mass is g/mol.
=> the molar mass of Mg(OH)₂
Mg + 2O + 2H
= (24.31) + (2×16) + (2×1.01)
= 58.33 gmol⁻¹.
then,
=> the number of moles:
n = m/M
=
= 0.0634 mol
=> the amount of water in liters needed to evapourate to produce 5.00 moles:
=>
=> 0.0634x = 5×1
=>
=> x = 78.8 litres.
Thus, the liters of sea water must evaporate to produce 5.00 moles of magnesium hydroxide - 78.8 litres.
learn more:
First we find the molar mass of Mg(OH)₂
Mg + 2O + 2H = 24.31 + 2×16 + 2×1.01 = 58.33 gmol⁻¹.
Then find the number of moles: n = m/M = 3.7 / 58.33 = 0.0634 mol
So now we know that 0.0634 mol are produced per litre of sea water.
Let the amount of water in litres needed to evapourate to produce 5.00 moles be x.
We can express this as a ratio.
0.0634 mol / 1 l = 5 mol / x l.
Solve for x by cross-multiplication:
0.0634x = 5×1
x = 5/0.0634 = 78.8 litres. (rounded to three significant figures)
Hope this helps!
(2) absorb energy as they move to higher energy states
(3) release energy as they move to lower energy states
(4) release energy as they move to higher energy states
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Absorption is when energy is absorbed by electrons and they move to a higher energy state
Emission is when electrons release that absorbed energy and move to a lower energy state
This release of energy results in emission of light from a flame
The correct answer is
Release energy as they move to lower energy states
The light emitted from a flame is produced when electrons in an excited state absorb energy as they move to higher energy states. Thus option 2 is correct.
What is energy level diagram?
Energy level diagram is defined as a graphical illustration of the energies of an atom's or molecule's various orbitals.
The energy level diagram is typically shown as a sequence of horizontal lines, with each line representing an orbital.
It can also be defined as an electron shell, or energy level, can be visualized as an orbit of electrons surrounding an atom's nucleus.
Electrons absorb energy and move from ground state to exited state, and come back to original state by releasing energy.
Thus, the light emitted from a flame is produced when electrons in an excited state absorb energy as they move to higher energy states. Thus option 2 is correct.
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635 g
635 g/cm3
634.5 ml
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Answer:
JUST B
Explanation:
Final answer:
The mass of 235 cm³ of aluminum, which has a density of 2.70 g/cm³, is calculated to be 634.5 g using the formula Mass = Density × Volume.
Explanation:
To find the mass of a given volume of a substance, you can use the formula: Mass = Density × Volume. In this case, the density of aluminum is given as 2.70 g/cm³ and you need to find the mass of 235 cm³ of aluminum.
Substitute the given values into the formula:
Mass = 2.70 g/cm³ × 235 cm³ = 634.5 g
Therefore, the mass of 235 cm³ of aluminum is 634.5 g.
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I hope this helps. Let me know if anything was unclear.
Answer:
D)- 6.00M
Explanation:
took test on edg