Is there something wrong with the chemical equation shown? Look carefully at the equation. What would need to be done to this equation to make sure that it follows the Law of Conservation of Mass?






Remove 2 hydrogen atoms (reactant) and 1 oxygen atom (product).

This equation already follows the Law of Conservation of Mass.

Add 2 hydrogen atoms (product) and 1 oxygen atom (reactant).

Add coefficients to some of the compounds to balance the number of atoms.

The importance of the carbon dioxide, CO₂ and the oxygen O₂ in the water is they both are important for the aquatic animals and for the aquatic plant.

The CO₂ and O₂ are both important for the aquatic animals and also for the aquatic plants. the concentration of the oxygen in to the water is important for the aquatic animals that the dissolved oxygen for the respiration. the carbon dioxide will be more soluble in water than the oxygen in the water.

The carbon dioxide forms the carbonic acid in the water. the carbon dioxide is useful for the aquatic plants for the growth.

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Using the law of the conservation of mass, the reactions can be shown to obey the law.

We need to know what the law of the conservation of mass says so that we can be able to know how we can be able to apply the law in the proper perspective. We have to know that the law says that total mass of the system would remain constant. The implication of this is that the mass before the reaction would be the same as the mass after the reaction. The mass of the substance must be able to add up in the system that is under study as we have one here.

Mass of the iron = 56 g

Mass of the chlorine = 35.5 g

Balanced reaction equation;

[tex]2Fe + 3Cl_{2} ---- > 2FeCl_{3}[/tex]

This is the  formation of the iron III chloride

Total mass on the right hand side = 2(56) + 6(35.5) = 325 g

Total mass on the left hand side = 2[56 + 3(35.5)] = 325 g

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Answer:

0,5 moles

Explanation:

N = L × n

n = N ÷ L

n = 2,87 × 10²³ ÷ 6,02 × 10²³

n = 2,87 ÷ 6,02

n = 0,47 moles or 0,5 moles

If the molecular weight is 230.26 g/mol carbon = 73.03% = 230.26*73.03/100 = 168.15/12 = 14 Carbons Hydrogen = 6.13% = 230.26*6.13/100 = 14/1 = 14 Hydrogens Oxigen = 20.84% = 230.26*20.84/100 = 47.98/16 = 3 Oxygens Hence the empirical formula is C14H14O3

The International System for Units (SI) defines the newton as the unit of force, which is used to measure weight. For instance, a kilogram of matter weighs around 9.8 newtons on Earth's surface and around each as much on Moon.

Weight, which is expressed in newtons, is a unit of measurement for the gravitational force acting on an object. The mass of a bird with a mass of 15 g changes with the strength of the gravity influence acting on it, and would differ significantly if it were measured, for instance, on the Moon rather than on Earth.

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After solving the equation: The half-life for this reaction is 0.693/0.271 = 2.56 s.

Reaction is the response of a system to an external or internal stimulus. It is the way a person or object behaves in response to a change in their environment. Reactions can be physical, chemical, or psychological. Physical reactions involve changes in the body, such as muscle tension, sweating, or heart rate.

The half-life for this reaction is the time it takes for the concentration of molecular iodine to decrease by a factor of 2, or for half of the original amount of molecular iodine to react. This can be calculated using the equation:

T1/2 = 0.693/k

where k is the first-order rate constant.

Therefore, the half-life for this reaction is 0.693/0.271 = 2.56 s.

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To solve this we must be knowing each and every concept related to isomer. Therefore, two  geometric isomers are possible for the complex [CrF[tex]_3[/tex]Br[tex]_3[/tex]]₃⁻.

An isomer is a chemical substance that has the same number and kinds of atoms like another chemical species that differs from it in terms of attributes due to the way the atoms are organized.

Stereoisomerism includes geometric isomerism. It is sometimes referred to as E-Z isomerism or cis-trans isomerism. Geometric isomerism is caused by cyclic compounds' constrained rotation around carbon-carbon double or single bonds.  The complex [CrF[tex]_3[/tex]Br[tex]_3[/tex]]₃⁻ has two  geometric isomers, one is facial and other is meridional.

Therefore, two  geometric isomers are possible for the complex [CrF[tex]_3[/tex]Br[tex]_3[/tex]]₃⁻.

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The total number of moles contained in 115 grams of C₂H5OH is 2.50 moles .

The term "mole" refers to the quantity of a substance that has the same amount of subatomic particles (ions, molecules, or atoms) as there are carbon atoms.

Atomic weight of carbon(C)= 12 gm

Atomic weight of Hydrogen (H)=1 gm

Atomic weight of oxygen (o)=16 gm

∴Molecula weight of C2H5OH =(12×2 + 1×6 + 16×1) gm

24 + 6 + 16 gm = 46 gm

∴ 46 gm of C2H5OH contains 1 mole

1 gm of C2H5OH contain = 1/46 moles

115 gm of C2H5OH contains = 115×1/46 moles

⇒2.5 moles

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Answer:

convection

Explanation:

Answer:

The next step is prototype testing

Explanation:

The stages of the design process are;

1) Situation analysis

Paper based research is conducted on the situation to obtain the situation parameters

2) Brief writing

With the situation analysis developed above, the brief of the current situation is put down on paper

3) Problem research

The problem is researched and experimented on with the development of a paper based proof of the possible concept

4) Specification writing

The specifications of the problem are outlined

5) List the possible solutions

The possible solutions are brainstormed and listed

6) Preferred solution selection

The preferred solution is selected based on the constraints in the situation

7) Create working drawing/plan

The working design drawing of the selected solution or concept is completed and evaluated for applicability

8) Building of a prototype

The design is converted into a prototype which is a model of the actual solution

9) Testing of the prototype

The prototype is tested for functionality, for ability to work in the intended situation and/or in the intended system

10) Report writing

A report is made on the outcome of the tests for review before production

Therefore, after the prototype is created, stage 8, the next step is the testing of the prototype stage 9.

The volume of 0.145 M NaOH is required to reach the equivalence point in the titration of 45.0 mL of 0.105 M HNO₃ is 32.58 mL.

Given that :

the molarity of the HNO₃ , M1 = 0.105 M

the volume of the HNO₃ , V1 = 45 mL

the molarity of the NaOH , M2 = 0.145 M

the volume the NaOH , V2 = ?

by using the equation given below , we get:

M1 V1 = M2 V2

0.105 × 45 = 0.145 × V2

V2 = 4.725 / 0.145

V2 = 32.58 mL

Thus volume of the NaOH is 32.58 mL.

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She changed the mask chemically. Burning of the substance with acid is a chemical change.

A new substance with new qualities is created during burning, which is a chemical alteration that cannot be undone. A chemical change is the transformation of one substance into another, the emergence of new compounds with distinct properties, or any combination of these. It happens when two substances mix to create a new material. Baking soda and vinegar producing carbon dioxide, iron rusting, and wood burning are a few examples of chemical changes. The metabolization of food and the production of amylase from the combining of sugar and saliva are only two examples of the many chemical processes that the body produces.

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Answer:

it turns into icecream

The properties of the elements are repeated after 2 8 18 and 32 elements because these are the maximum number of the electrons that the four shells contains.

The electronic configuration of the elements in the periodic table are repeated because the maximum number of the electrons that the four shells can have are 2 8 18 and 32. the name of the four shells are K , L, M, N. The electronic configuration of the elements are repeated and due to this the properties of the elements are repeated.

Thus, the properties of the elements are increases because the electronic configuration are repeated in the periodic table.

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Answer: The new temperature is 4768 K.

Explanation:

Given: [tex]T_{1}[/tex] = 298 K,    [tex]V_{1}[/tex] = V,        [tex]P_{1}[/tex] = P

[tex]T_{2}[/tex] = ?,           [tex]V_{2}[/tex] = 4V,           [tex]P_{2}[/tex] = 4P

Using the combined gas law formula as follows.

[tex]\frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}[/tex]

Substitute the values into above formula as follows.

[tex]\frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}\\\frac{P \times V}{298 K} = \frac{4P \times 4V}{T_{2}}\\T_{2} = 4768 K[/tex]

Thus, we can conclude that the new temperature is 4768 K.

Zinc, phosphorus and oxygen are elements contained in dental cement (Zn₃(PO₄)).

Dental cements have a wide range of dental and orthodontic applications. Common uses include temporary tooth restoration, lining cavities to protect the pulp, sedation or isolation, and cementation of fixed prosthetic devices.

A cement-retained bridge is simply a dental device that is permanently fixed in the mouth to restore the mouse's function and aesthetics and to prevent many of the consequences of tooth loss that affect the immediate aftermath of losing natural teeth.

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The limiting reactant, O₂, forms 2.7 mole Al₂O₃. Therefore, the mass of Al₂O₃ is 280 g.

The term mole (M) is defined as the amount of substance in a system which include as many elementary entities as there are atoms present in it. It is denoted by the symbol “mol”. The word mole is coming from the Latin word moles, which means “a mass”.

Molar Mass of Al₂O₃ = 101.96 g/mol

2.7 mole Al₂O₃          101.96 g

------------------------  x  -------------------    

             X                       1 mole

= 280 g Al₂O₃

Thus, The limiting reactant, O₂, forms 2.7 mole Al₂O₃. Therefore, the mass of Al₂O₃ is 280 g.

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Answer:

look for evidence that the molecules are chiral.

Explanation:

The instrument with which optically active compounds are studied is a polarimeter, shown in the figure below. Imagine a horizontal line that passes through the zero of a coordinate system.

If 87 grams of K₂SO₄ is dissolved in enough water to make 250 milliliters of solution,  the concentrations of the potassium [K⁺] is 4 M and the sulfate ions [SO₄²⁻] is 2 M.

The molar mass of the  K₂SO₄ = 174 g/mol

The mass of the  K₂SO₄ = 87 g

the moles of the  K₂SO₄ = 87 / 174

                                         = 0.50 mol

moles of K⁺ = 0.50 × 2

                    = 1 mol

moles of SO₄²⁻ = 0.50 × 1

                          = 0.50

The concentration of [K⁺] = 1 / 0.250 = 4 M

The concentration of [SO₄²⁻] =  0.50 / 0.250 = 2 M

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The product could have been lost if this experiment was conducted in a physical laboratory: Human Error, Incomplete Reaction, Inadequate Stirring, Impurities and Loss of Product.

Product is a tangible or intangible good that is produced for sale on the market.

1. Human Error: Inaccurate measurements or miscalculations during the experiment may have caused the percent yield not to be 100%.
2. Incomplete Reaction: Depending on the reaction conditions, it is possible that the reaction did not go to completion, leading to a lower percent yield than expected.
3. Inadequate Stirring: If the reactants were not adequately mixed during the experiment, some reactants may not have been able to properly react, resulting in a lower percent yield.
4. Impurities: If the reactants used in the experiment were impure, it could lead to a lower percent yield due to the presence of undesirable substances that can interfere with the reaction or are not involved in the reaction.
5. Loss of Product: If the experiment was conducted in a physical laboratory, it is possible that some of the product was lost during the experiment due to improper handling or other factors.

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The major organic product of this reaction is 2-bromobutane, a saturated hydrocarbon with a bromine atom attached to the second carbon atom.

The major organic product is 2-bromobutane.

Structure:

CH3 CH2 CH2 CH2 Br

    |   |   |

    CH3 CH2 Br

1) The reaction begins with bromine reacting with the 2-methylpropane molecule to form the intermediate 2-bromo-2-methylpropane.

2) The intermediate then reacts with hydroxide ions to form the final product, 2-bromobutane.

3) The final product is a saturated hydrocarbon with a bromine atom attached to the second carbon atom.

The major organic product of this reaction is 2-bromobutane, a saturated hydrocarbon with a bromine atom attached to the second carbon atom.

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the answer I think is the metamorphic rock

Answer:

metamorphic

Explanation:

sedimentary rocks under heat and pressure form metamoephoc rocks

Answer:

mettaliods

Explanation:

It has the both property of metal and non metal so it is called mettaliod.

Answer:

metalloids

Explanation:

they are solid at roomtempreture and alloys with metals.

examples boron,silicon,arsenic,tellurium

Oxidation of methane to soot:

CH4(g)+O2(g)⟶C(s)+2H2O(g)

Among the hydrocarbons is methane, CH4(g). Only the elements carbon (C) and hydrogen (H) are present in the complex. When methane burns with too much oxygen, it produces water vapor and carbon dioxide gas CO2(g) (g). Complete combustion is defined as combustion with extra oxygen.

Methane can be partially oxidized into a variety of compounds when it is burned inefficiently, including CO, methanol, formic acid, formaldehyde, and higher hydrocarbons.

Carbon monoxide is an extremely toxic gas. It is invisible and odorless. Without anybody being aware of it, malfunctioning gas fireplaces or boilers can poison the air in a room by emitting carbon monoxide.

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The complete question is

Problems that can be caused by both the complete and incomplete

combustion of methane in a gas fire.

'The temperature of the reaction mixture increases'  would be evidence that a chemical reaction took place.

What is a dilute solution?

A dilute solution is a solution that contains fewer solute particles than a more concentrated solution. Dilute solutions are generally less concentrated than more concentrated solutions and are often made by adding more solvent to the solution.

When a chemical reaction takes place, energy is released in the form of heat. This increase in temperature is basically known as an exothermic reaction. An increase in temperature is a sign that a chemical reaction has taken place, as the reaction mixture is absorbing the energy released from the reaction.

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Answer:

velma is recommending the stronger soloution

Explanation:

because firstly velmas solution is more concentrated and the pH level of her solution is more Alkaline than shaggies solution