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Caliche chemical formula

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Caliche chemical formula

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According to the law of conservation of mass, in a chemical reaction, the mass of the reactant will always be different from the mass of the product. True Or False

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According to the law of conservation of mass, in a chemical reaction, the mass of the reactant will always be different from the mass of the product. True Or False

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A chemical or physical change that takes in heat from its surroundings is an exothermic process an explosion an endothermic process a phase change

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A chemical or physical change that takes in heat from its surroundings is an exothermic process an explosion an endothermic process a phase change

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E. solid copper sulfide and silver nitrate react to form copper (ii) nitrate and solid silver sulfide. write a balanced chemical equation that describes the reaction. identify the oxidation number of each element in the reaction. (you do not need to include the total contribution of charge.) is this reaction a redox reaction or a non-redox reaction? explain your answer.

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Answer:

The given reaction is not a redox reaction.

Explanation:

Redox reaction is defined as chemical reaction in oxidation and reduction reactions occurs simultaneously.

Oxidation reaction is defined as the reaction in which an atom looses its electrons. Here, oxidation state of the atom increases.

Reduction reaction is defined as the reaction in which an atom gains electrons. Here, oxidation state of the atom decreases.

Solid copper sulfide when immersed in silver nitrate solution it reacts to form silver sulfide precipitate and copper(II) nitrate solution.

CuS(s)+2AgNO_3(aq)rightarrow Cu(NO_3)_2(aq)+Ag_2S(s)

Oxidation states of elements on reactant side:

Oxidation state of copper  = +2

Oxidation state of sulfur = -2

Oxidation number of silver  +1

Oxidation number of nitrogen = +5

Oxidation number of oxygen = -2

Oxidation states of elements on product side:

Oxidation state of copper  = +2

Oxidation state of sulfur = -2

Oxidation number of silver  +1

Oxidation number of nitrogen = +5

Oxidation number of oxygen = -2

No change in oxidation states of elements is observed which means that the given reaction is not a redox reaction.

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What kind of change occurs when salt dissolves in water a.) solution change b.) physical change c.) chemical change d.) substance change

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What kind of change occurs when salt dissolves in water a.) solution change b.) physical change c.) chemical change d.) substance change

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To break a chemical bond, particles need to collide with a certain amount of ____?

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Explanation:

To break a chemical bond, it is required that particles must have certain amount of energy so that when they can collide with each other due to this energy.

Therefore, there will exist a certain amount of force between the particles which will help in breaking the chemical bond.

This energy due to the motion of particles is known as kinetic energy.

Thus, we can conclude that to break a chemical bond, particles need to collide with a certain amount of kinetic energy.

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The chemical formula for naphthalene is C10H8. It’s used to make mothballs and pesticides. In 4C10H8, the coefficient is blank , the subscript of carbon is blank , and the subscript of hydrogen is blank

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Explanation:

Naphthalene has chemical formula as C_{10}H_{8} and it is an organic compound. It is used as mothballs and pesticides because it has a very characteristic odor which can be found at very low concentrations.

The given naphthalene molecule is 4C_{10}H_{8}. Therefore, it can be described as follows.

  • The coefficient is 4.
  • Subscript of carbon is 10.
  • Subscript of hydrogen is 8.

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Which of the following best summarizes the law of conservation of mass? a. Matter can be changed but not created or destroyed. b. Matter can be destroyed during a chemical reaction. C. Matter that gains mass during a chemical reaction is evidence that matter can be created.

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Which of the following best summarizes the law of conservation of mass? a. Matter can be changed but not created or destroyed. b. Matter can be destroyed during a chemical reaction. C. Matter that gains mass during a chemical reaction is evidence that matter can be created.

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Ccording to Le Chatelier’s principle, what happens when the concentration of a product is reduced in a chemical reaction that was in equilibrium? A. The equilibrium shifts to the right to favor the formation of products. B. The equilibrium shifts to the left to favor the formation of reactants. C. The equilibrium shifts in the exothermic direction. D. The equilibrium shifts in the endothermic direction.

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Ccording to Le Chatelier’s principle, what happens when the concentration of a product is reduced in a chemical reaction that was in equilibrium? A. The equilibrium shifts to the right to favor the formation of products. B. The equilibrium shifts to the left to favor the formation of reactants. C. The equilibrium shifts in the exothermic direction. D. The equilibrium shifts in the endothermic direction.

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Consider the chemical equation. 2NBr3 + 3NaOH –> N2 + 3NaBr + 3HOBr If there are 40 mol of NBr3 and 48 mol of NaOH, what is the excess reactant? N2 NBr3 NaOH HOBr

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Consider the chemical equation. 2NBr3 + 3NaOH –> N2 + 3NaBr + 3HOBr If there are 40 mol of NBr3 and 48 mol of NaOH, what is the excess reactant? N2 NBr3 NaOH HOBr

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1). a). What is the difference between a physical property and a chemical property? b). Give an example of one physical property and one for chemical property for each pf the following: wood, gasoline, and baking soda?

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Physical is the property related to the forces and physical phenomenon’s and the thing that has a physical property doesn’t reacts with something. Chemical property is based on the reactions between atoms/ chemical compounds , the bonds are developed between electrons so it’s often refered to the chemical elements.

An example is the ions’ extrication of an chemical compound. If compound has already ions the extrication goes physically. Differently if compound has not ions, it reacts with other compounds in case to ions be developed. (Chemical phenomenon/property)

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I NEEED HELP PLEASEEEEEE I WILL RATE BRAINLIEST!!!!!!!!!!!! Select the properly written and balanced equation for the following chemical reaction: Aqueous solutions of sodium hydroxide and iron (III) nitrate react to produce a precipitate of iron (III) hydroxide in an aqueous solution of sodium nitrate. ——-3NaOH (aq) + Fe(NO3)3 (aq) Fe(OH)3 (s) + 3NaNO3 (aq) NaOH (aq) + FeNO3 (aq) FeOH (s) + NaNO3 (aq) NaOH (aq) + Fe(NO3)3 (aq) FeOH3 (s) + NaNO3 (aq) 3NaOH (aq) + FeNO3 (aq) FeOH (s) + 3NaNO3 (aq) I believe that it is the first choice but I am not sure….

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I NEEED HELP PLEASEEEEEE I WILL RATE BRAINLIEST!!!!!!!!!!!! Select the properly written and balanced equation for the following chemical reaction: Aqueous solutions of sodium hydroxide and iron (III) nitrate react to produce a precipitate of iron (III) hydroxide in an aqueous solution of sodium nitrate. ——-3NaOH (aq) + Fe(NO3)3 (aq) Fe(OH)3 (s) + 3NaNO3 (aq) NaOH (aq) + FeNO3 (aq) FeOH (s) + NaNO3 (aq) NaOH (aq) + Fe(NO3)3 (aq) FeOH3 (s) + NaNO3 (aq) 3NaOH (aq) + FeNO3 (aq) FeOH (s) + 3NaNO3 (aq) I believe that it is the first choice but I am not sure….

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The chemical formula of lithium carbonate is Li2CO3. Which statement below best describes the types and number of atoms of each element making up this substance? A. Two lithium atoms; one calcium atom; one oxygen atom B. One lithium atom; three carbon atoms; three oxygen atoms C. One lithium atom; one carbon atom D. Two lithium atoms; one carbon atom; three oxygen atoms

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The chemical formula of lithium carbonate is Li2CO3. Which statement below best describes the types and number of atoms of each element making up this substance? A. Two lithium atoms; one calcium atom; one oxygen atom B. One lithium atom; three carbon atoms; three oxygen atoms C. One lithium atom; one carbon atom D. Two lithium atoms; one carbon atom; three oxygen atoms

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HELP PLEASE! 3 SCIENCE QUESTIONS! I'm stuck on my last 3. #1 Compare and contrast chemical change and physical change. #2 Compare and contrast a gas and a plasma. #3 What state of matter has the electrons separated from the nuclei of the atoms? Gas Solid Liquid Plasma

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HELP PLEASE! 3 SCIENCE QUESTIONS! I’m stuck on my last 3. #1 Compare and contrast chemical change and physical change. #2 Compare and contrast a gas and a plasma. #3 What state of matter has the electrons separated from the nuclei of the atoms? Gas Solid Liquid Plasma

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#1 Compare and contrast chemical change and physical change. #2 Compare and contrast a gas and a plasma.

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Answered by answersmine AT 22/10/2019 – 03:27 AM

In a physical reaction, no bonds are broken, and the reaction can be reversed mechanically, while in a physical reaction, two or more substances are combined, and bonds are broken to form completely new substances. Plasma is basically just super-heated gas.

Post your answer

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Which reactions performed in the experiment involved chemical changes?

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Which reactions performed in the experiment involved chemical changes?

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An enzyme is a protein that_____ transports nutrients across a membrane increases the rate of a chemical reaction receives and sends signals across a cell provides structure for the cell’s organelles

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Answer:

The given blank can be filled with that it increases the rate of a chemical reaction.

Explanation:

A substance or a component, which functions as a catalyst in the living species, monitoring the rate at which chemical reactions advances without itself getting changed in the entire process is known as an enzyme. The enzyme works by enhancing the rate of a chemical reaction. The biological procedures that take place inside the living species are the chemical reactions, and the majority of these are monitored by enzymes. In the absence of enzymes, several of these reactions would not occur at the desired rate.

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Another name for chewing is A. mastication. B. deglutition. C. prehension. D. chemical digestion.I'm pretty sure it's A, im just not 100% sure.

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Another name for chewing is A. mastication. B. deglutition. C. prehension. D. chemical digestion.I’m pretty sure it’s A, im just not 100% sure.

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Marilyn is depressed a great deal of the time and seeks help from a doctor. she is diagnosed as having a mental illness caused by a chemical imbalance. marilyn is most likely being treated by a person who adheres to the _____ of psychological disorders.

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Answered by answersmine AT 22/10/2019 – 04:59 AM

marilyn is most likely being treated by a person who adheres to the Medical model of psychological disorders.
The medical model of psychological disorders will make the assumption that any form of psychological disorders is a direct result of physical problems (such as chemical imbalances or the damage in your brain).

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Can endothermic chemical reactions be spontaneous?

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Can endothermic chemical reactions be spontaneous?

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Chemical reactions such as the decomposition of wastes also occur much faster in warmer water. a. True b. False

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Pon heating, a 5.41 g sample of a compound decomposes into 2.37 g n 22 and 3.04 g h 22 o. if the molar mass of the compound is 64.06 g/mol, what is the chemical formula of the compound

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The unknown of this problem is the experimental percent of water in the compound in order to remove the water of hydrogen, given the following:

Mass of crucible, cover and contents before heating                               23.54 g
Mass of empty crucible and cover                                                            18.82 g
Mass of crucible, cover, and contents after heating to constant mass     20.94 g

In order to get the answer, determine the following:

Mass of hydrated salt used                          = 23.54 g – 18.82 g = 4.72 g
Mass of dehydrated salt after heating          = 20.94 g – 18.82 g = 2.12 g
Mass of water liberated from salt                 = 4.72 g – 2.12 g = 2.60 g

Then solve the percent of water in the hydrated salt by:

% water = (mass of water / mass of hydrated salt) x 100
% water = 2.60 g / 4.72 g x 100
% water = 55.08 % in the compound 

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Which statement best describes how a catalyst can speed up a chemical reaction? The catalyst makes lower energy pathways available. The catalyst increases the concentration of products. The catalyst binds to enzymes to release substrates. The catalyst increases the concentration of reactants.

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There are two systems in the human body that are responsible for the coordination between the functions of different systems to achieve the unity of the living organism’s body. These two systems are the nervous system and the endocrine system. The action of the nervous system is fast and takes a short time, while the action of the endocrine system is slow and takes a long time.

The functional unit of the nervous system is the nerve cell or the neuron. The neuron consists of a cell body and the axon. The cell body starts with the dendrites that receive the messages or the impulses from other neurons or from different sense organs or receptors. These impulses are then transmitted through the cell body. The cell body contains a nucleus and different organelles which help the nerve cell to perform its functions. The nerve impulse is then transmitted to the axon.

The axon is an extension from the cell body. There are some cells called Schwan cells that secrete a myelin sheath to insulate the axon from the surrounding medium. The insulated axons have more ability to conduct the impulses than non-insulated axons. The axon ends with the terminal arborizations. The terminal arborizations of a nerve cell connect to the dendrites of the next cell or to the afferent organ. The gaps between the dendrites and the terminal arborizations are called the synapses.

The nerve impulse is an electrochemical phenomenon i.e. an electrical phenomenon with a chemical nature. The membrane of the axon acts as a barrier between an outside positively charged medium and an inside negatively charged medium. This makes a potential difference of  -70mV. This state is called the resting potential. When the membrane is subjected to a stimulus, the positive charges enter to inside and the negative charges exit to the outside. The potential difference now becomes +40mV. This state is called the depolarization state. The point of stimulation acts as a new stimulus for the next point and so on. The membrane sooner gains its permeability again and the positive charges return to the outside and the negative charges to inside. This state is called repolarization.

The nerve impulse reaches the synapse. There are some neurotransmitters that are excited by the nerve impulse coming and carry the message across the membrane. Some receptors receive theses neurotransmitters on the dendrites of the next neuron. These receptors act as a stimulus for the new cell.

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The cell membrane around a cell forms a barrier that protects and regulates the cell. Certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane. Which best describes those that can pass through? They are concentrated. They are soluble. They are diluted. They are heated.

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The cell membrane around a cell forms a barrier that protects and regulates the cell. Certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane. Which best describes those that can pass through? They are concentrated. They are soluble. They are diluted. They are heated.

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As a substance changes phase from a gas to liquid to solid: A- The spacing between molecules increases. B- It's density generally increases. C- The spacing between molecules is not affected. D- It undergoes chemical change.

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As a substance changes phase from a gas to liquid to solid: A- The spacing between molecules increases. B- It’s density generally increases. C- The spacing between molecules is not affected. D- It undergoes chemical change.

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