What isotope is the more "favored" amoung the organisms on Earth?

When the arrangement of atoms changes in a substance, the properties of the substance can change as well. The different arrangements of atoms can lead to different chemical and physical properties.

For example, if the atoms of a substance are rearranged to form a new compound, the new compound will have different chemical properties than the original substance. A new compound may have a different color, odor, reactivity, or melting point than the original substance.

Changing the arrangement of atoms without changing the chemical composition can change the physical properties. For example, a crystalline solid has atoms or molecules arranged in a regular, repeating pattern. This arrangement gives the material unique properties such as density, melting point, and hardness. If the arrangement of atoms and molecules changes, the properties of solids can also change.

In summary, when the arrangement of atoms in a substance changes, the properties of the substance can also change. Different arrangements of atoms have different chemical and physical properties.

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The amount of excess reagent remains when 4.0 g zinc reacts with 2.0 g phosphorus is option (A) 0.70 g

To determine the amount of excess reagent remaining in the reaction between zinc (Zn) and phosphorus (P), we need to identify the limiting reactant first. The balanced chemical equation for the reaction is:

\(3Zn + 2P - > Zn_3P_2\)

To find the limiting reactant, we compare the number of moles of each reactant and determine which one is present in a lower amount relative to the stoichiometry of the reaction.

First, we convert the given masses of the reactants to moles using their respective molar masses:

For zinc (Zn):

n(Zn) = (4.0 g) / (65.38 g/mol) = 0.0612 moles

For phosphorus (P):

n(P) = (2.0 g) / (30.97 g/mol) = 0.0646 moles

According to the balanced equation, the stoichiometry of the reaction is 3:2 for Zn to P. This means that for every 3 moles of Zn, we need 2 moles of P. In this case, the ratio of moles is 0.0612:0.0646, which shows an excess of phosphorus (P).

To find the amount of excess reagent remaining, we need to calculate the moles of the limiting reactant (Zn) used based on the stoichiometry of the reaction. From the balanced equation, we know that for every 3 moles of Zn, 2 moles of P are consumed.

Using the ratio of moles, we find the moles of Zn used:

n(Zn used) = (2/3) * n(P) = (2/3) * 0.0646 moles ≈ 0.0431 moles

To determine the remaining amount of excess reagent (P), we subtract the moles of P used from the initial moles of P:

Remaining moles of P = Initial moles of P - Moles of P used

Remaining moles of P = 0.0646 moles - 2 * (2/3) * 0.0646 moles ≈ 0.0215 moles

Finally, we convert the moles of remaining P to grams using its molar mass:

mass(P remaining) = n(P remaining) * molar mass(P) = 0.0215 moles * 30.97 g/mol ≈ 0.665 g

Therefore, approximately 0.665 g of phosphorus (P) remains as the excess reagent. The correct option would be (A) 0.70 g P, which is the closest value.

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All 2.0 g of phosphorus reacted with 4.0 g of zinc to form 13.1 g of Zn3P2, leaving 0.9 g of zinc unreacted. Therefore, the answer is (C) 0.22 g Zn.

To determine the amount of excess reagent, we first need to find the limiting reagent in the reaction. We can do this by calculating the amount of product that can be formed from each reactant and comparing them.

From the balanced chemical equation, we know that 3 moles of zinc react with 2 moles of phosphorus to form 1 mole of Zn3P2. Using the molar masses of zinc (65.38 g/mol) and phosphorus (30.97 g/mol), we can convert the given masses to moles:

4.0 g Zn = 0.0612 mol Zn
2.0 g P = 0.0647 mol P

We can see that there is slightly more moles of phosphorus than zinc, meaning zinc is the limiting reagent. Therefore, all of the phosphorus will react with the available zinc, leaving some zinc unreacted.

To calculate the amount of excess zinc, we can use stoichiometry again:

0.0612 mol Zn x (2 mol Zn3P2 / 3 mol Zn) x (386.11 g Zn3P2 / 1 mol Zn3P2) = 13.1 g Zn3P2

This means that all 2.0 g of phosphorus reacted with 4.0 g of zinc to form 13.1 g of Zn3P2, leaving 0.9 g of zinc unreacted. Therefore, the answer is (C) 0.22 g Zn.

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Answer:

hola no ablo inglés porfavor

The correct number of nuclear particles in an atom of hafnium-178 is: 106 protons, 72 neutrons.

Hafnium is a chemical element with the symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Hafnium is a chemical element with the symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals.

Thus, the correct number of nuclear particles in an atom of hafnium-178 is: 106 protons, 72 neutrons.

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Nitrate compounds is the answer

Answer:B

Explanation:

Compounds are elements and its a pure substance with a gised composition.

Mixtures two or more subtances mixed to together.There are 2 type of mixtures.

Homegenous Mixtures (Solutions)-Two or more substances mixed but is uniform, you cant see the different mixtures.

Ex:Sugar mixed with water.The sugar dissolves and becomes one with the water.

Heterogeneous Mixtures-Two or more substances mixed but is not uniformed.You can see all the substances put into the mixture.

Ex:A salad, you can see whats all mixed in the sald and can pick it apart.

Answer:

B

Explanation:

The efficiency of a machine is the ratio of the output work it performs to the input work required to operate it. This ratio is expressed as a percentage, and it tells you how much of the input work is converted into useful output work.

For example, if a machine requires 10 units of input work to perform 5 units of output work, its efficiency would be 50%. This means that 50% of the input work is converted into useful output work, while the remaining 50% is lost as waste heat, friction, or other forms of energy dissipation.

In general, the efficiency of a machine is determined by its design, as well as the materials and components used to construct it. Machines that are well-designed and constructed with high-quality materials will typically have higher efficiencies than those that are poorly designed or made with lower-quality materials.

It's also important to note that the efficiency of a machine can vary depending on the type and amount of work it is performing. For example, a machine may be more efficient at performing certain tasks than others, or it may become less efficient as it wears out or is subjected to heavy use.

Answer:

O titanium, Ti

Explanation:

Answer:

D

Explanation:

The convection current pictured is associated with the sea breeze phenomenon, so the type of wind that is part of this convection current is D Sea Breeze.

Sea breeze is a local wind that is created by the temperature difference between the land and sea surfaces. During the day, the land surface heats up faster than the sea surface. This causes the air above the land to rise, creating a low-pressure area. Meanwhile, the air above the sea remains cooler and denser, creating a high-pressure area. The pressure difference between the land and sea causes air to flow from the sea to the land, resulting in the sea breeze.

In the picture, we can see that the arrows indicate air moving from the sea towards the land. This corresponds to the direction of the sea breeze flow. Therefore, the type of wind that is part of this convection current is D  Sea Breeze.

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Answer: It's B Land Breeze I swear

Explanation: I took the test

Answer:

1st question: The moon is closer to Earth so it is easier to see and visit.

2nd question: The moon has a week/month cycle instead of a day/night cycle.

3rd question: The corona

Explanation:

Answer:

A continuous color sequence is a pattern that can be used to determine if paint chips are missing from the set. If the color change from chip to chip is not continuous, a chip is probably missing. This pattern is useful to display paint chips for customers.

Answer:

Angel Fish!

Explanation:

Answer:

Angel fish, the other person answered first tho.

Explanation:

Answer:

It's electrons

Explanation:

Don't forget to like :)

The emigration of wolves from a grassland ecosystem that supports rabbits which happens to be wolve's primary prey will lead to an increase in the population of rabbits in the ecosystem

Predators and preys share a relationship such that the former feeds on the latter as food. Thus, the presence of wolves serves as a limiting factor to the growth of the rabbit population.

Therefore, once the wolves emigrate away from the ecosystem, the population of rabbits will thrive because one of its limiting factors has been removed.

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Explanation:

you can use Born-Lande equation,

U=-(A×e^2×Z+ ×Z- ×N)\r ×(1-1/n)

here,U=lattice energy

A=madelung constant

n=Born exponent(depends on repulsion between ion)

e=charge of electron

Z+,Z-=charge of cation and anion

r=distance between cation and its neighbour anion in

space lattice

The energy is 375 J.

Energy is the quantitative belongings that are transferred to a frame or to a physical gadget, recognizable within the overall performance of labor and within the shape of warmth and mild. power is a conserved amount—the law of conservation of strength states that power may be converted in form, but now not created or destroyed.

Calculation:-

Total energy = 1200 J

Transfered emergy = 375 J

The useful energy is the energy to do work = 375 J.

The ability or strength to do paintings, along with the potential to transport an item (of a given mass) by means of the application of pressure. power can exist in a spread of forms, which includes electric, mechanical, chemical, thermal, or nuclear, and may be transformed from one form to another.

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Carbon 14 would be your answer, however if it's more than one answer it would also be Carbon 12, so yeah. Your best bet would be Carbon 14.

Answer: C

(no guarantees though)

Motion of particles is not one of the main factors that determine the state of matter.

Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it has volume .Matter is composed up of atoms which may or not be of same type.

Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states such as solids, liquids and gases depending on the conditions of temperature and pressure.

The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.Matter is  always conserved as per law of conservation of matter.It can be interchanged by varying particle size and  particle forces.

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The oxidation number of chromium in the ionic compound ammonium dichromate, (NH₄)₂Cr₂O₇, is +6.

This is because the ammonium ion (NH₄⁺) has a +1 charge, and the oxygen ions (O²⁻) each have a -2 charge, so the two chromium ions (Cr) must each have a +6 charge in order to balance the overall charge of the compound, which is 0. So, the long answer to your question is that the oxidation number of chromium in ammonium dichromate is +6.

A positive or negative number assigned to an atom in a molecule or ion to indicate its degree of oxidation or reduction in a chemical reaction is known as n oxidation number. It is a formalism that is used to keep track of the transfer of electrons between atoms during the chemical reactions.

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Cesium is the element that possesses the similar chemical properties to potassium.  

• Potassium is considered as the waxy and soft element in appearance and has the symbol K.  

• The atomic number of potassium is 19.  

• By characteristics, cesium is also soft in nature and has a goldy finish.  

• Both potassium and cesium are the alkali metals.  

• Both of these are soft in texture and are highly responsive.  

Thus, the correct answer is cesium.

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Answer:

Volume = 35.2×220×6.0 = 46464 centimeters³

Explanation:

Answer:

Explanation:

To find the number of atoms present in 8.500 mole of chlorine atoms, we can use Avogadro's number, which states that one mole of any substance contains 6.022 x 10^23 particles. Therefore, 8.500 moles of chlorine atoms would contain:

8.500 moles x 6.022 x 10^23 atoms/mole = 5.1207 x 10^24 atoms of chlorine

To determine the mass (g) of 15.50 mole of oxygen, we can use the molar mass of oxygen, which is 16.00 g/mol. Therefore, the mass of 15.50 moles of oxygen would be:

15.50 moles x 16.00 g/mol = 248 g of oxygen

To determine the number of moles of helium in 1.953 x 10^8 g of helium, we can use the molar mass of helium, which is 4.00 g/mol. Therefore, the number of moles of helium would be:

1.953 x 10^8 g / 4.00 g/mol = 4.883 x 10^7 moles of helium

To calculate the number of atoms in 147.82 g of sulfur, we first need to find the number of moles of sulfur using the molar mass of sulfur, which is 32.06 g/mol. Therefore, the number of moles of sulfur would be:

147.82 g / 32.06 g/mol = 4.604 moles of sulfur

Next, we can use Avogadro's number to find the number of atoms in 4.604 moles of sulfur:

4.604 moles x 6.022 x 10^23 atoms/mole = 2.772 x 10^24 atoms of sulfur

The molar mass of Co (cobalt) can be found on the periodic table, which is 58.93 g/mol.

To determine the formula mass of Ca3(PO4)2, we need to find the sum of the masses of all the atoms in the formula. The molar masses of Ca, P, and O can be found on the periodic table:

Ca: 40.08 g/mol

P: 30.97 g/mol

O: 16.00 g/mol

Ca3(PO4)2 would contain:

3 atoms of Ca: 3 x 40.08 g/mol = 120.24 g/mol

2 atoms of P: 2 x 30.97 g/mol = 61.94 g/mol

8 atoms of O: 8 x 16.00 g/mol = 128.00 g/mol

Adding these masses together gives us:

120.24 g/mol + 61.94 g/mol + 128.00 g/mol = 310.18 g/mol

Therefore, the formula mass of Ca3(PO4)2 is 310.18 g/mol.

Answer:

i think its yes

Explanation:

Answer: the answer is yes

Explanation: I know because I had it on my chemistry test yesterday

Answer:

d). A catalyst lowers the activation energy for a chemical reaction.

Explanation:

From the given choices, it is true that a catalyst lowers the activation energy for a chemical reaction.

The activation energy is the energy barrier that must be overcome before a chemical reaction can occur.

Some reactions have very high activation energy and would not occur without the introduction of a catalyst.

The catalyst brings the reactants into contact by removing the energy deficiency in the system.