Bromothymol blue was used to indicate the pH of the solution.
Bromothymol blue is a pH indicator, which means it changes color in response to changes in the pH of the solution. In particular, bromothymol blue is yellow in basic solutions (pH 7.6 - 6.0) and blue in acidic solutions (pH 6.0 - 7.6).
In the experiment, the presence of bromothymol blue allowed the researchers to observe changes in the pH of the solution, and to make more accurate measurements of the pH than would be possible without the indicator. This information was likely used to track the progress of the reaction or to monitor the pH of the solution at different stages of the experiment. By using bromothymol blue, the researchers were able to gain a better understanding of the conditions of the reaction and to make more informed conclusions about the results.
Learn more on Bromothymol blue:
https://brainly.com/question/18152496
#SPJ4
Give one property of sodium chloride that is not a property of sodium or chloride
Answer:
Explanation:
Sodium:
A soft, silver-white, metallic element that oxidizes rapidly in moist air, occurring in nature only in the combined state, and used in the synthesis of sodium peroxide, sodium cyanide, and tetraethyllead: a necessary element in the body for maintenance of normal fluid balance and other physiological functions. Symbol: Na; atomic weight: 9898; atomic number: 11; specific gravity: 0.97 at 20°C.
Chloride:
A salt of hydrochloric acid consisting of two elements, one of which is chlorine, as sodium chloride, NaCl
Sodium chloride:
Salt, a crystalline compound, sodium chloride, NaCl, occurring as a mineral, a constituent of seawater, etc., and used for seasoning food, as a preservative, etc.
Now we must discuss the differences.
The sodium ion and chlorine anion combine to generate sodium chloride, an ionic molecule. The chlorine atom obtains an electron to form the chlorine ion, while the sodium ion is created from the sodium metal by removing one valence electron from its outermost electronic state.
The compounds that are created by a cation and an anion and have an ionic connection between the two ions are referred to as ionic compounds. The definition of an ionic bond is a bond created by an electron transfer between two atoms.
The characteristics of the individual atoms or the ions are different from those of the ionic complex. The chlorine atom is a yellow-green gas that corrodes the metal and is dangerous, whereas the sodium atom is a silvery white that aggressively burns in the air and becomes explosive when it comes into touch with water. The ionic compound sodium chloride has a white crystalline form and is frequently used as table salt in daily life for ingestion and other activities.
Properties:
Sodium chloride
Ionic compoundTable salt and is consumedBoiling point is 1465 degree CelsiusMelting point is high 800.7 degree CelsiusSodium
Metal elementExplosive when reacted with waterSoft and harmfulBoiling point is 882.940 degree CelsiusMelting point is 97.794 degree CelsiusChloride:
Non-metalSoluble in waterPoisonousBoiling point is -34.04 degree Celsius.Melting point is -101.5 degree CelsiusThis is how the sodium chloride varies from sodium and chlorine atoms in terms of properties.
Note: As sodium is a very soft metal, it is maintained and stored in mineral oil to stop it from interacting with the air and water. Metal sodium should be treated cautiously while being used.
- Eddie
a hypothetical element consists of two isotopes. the abundance of one isotope is 66.00%, and its atomic mass is 81.9823. the atomic mass of the second isotope is 90.1805. what is the average atomic mass of the element?
The average atomic mass of the element is 85.2675 atomic mass units (amu). which is the result of second isotope 90,1805.
The average atomic mass of the element can be calculated using the following formula which can help us to gain perfect answer.
Average atomic mass = (Percent abundance of isotope 1 * Atomic mass of isotope 1) + (Percent abundance of isotope 2 * Atomic mass of isotope 2)
Average atomic mass can be = (66.00% * 81.9823) + (34.00% * 90.1805)
Percent abundance of isotope 2 = 100 - 66 = 34
Average atomic mass is= (54.65458) + (30.61290)
Average atomic mass will be = 85.2675
To know more about atomic mass
brainly.com/question/17067547
#SPJ4
iupac name of organic compounds (I got deadline in 2 hours)
IUPAC name of the compound is 2-methyl-3-pentanone.
What does organic chemistry IUPAC nomenclature mean?
The International Union of Pure and Applied Chemistry's preferred nomenclature for identifying organic chemical substances is known as the IUPAC nomenclature of organic chemistry (IUPAC). It appears in the Nomenclature of Organic Chemistry journal (informally called the Blue Book). Every potential organic molecule should ideally have a name from which a clear structural formula can be derived. Additionally, inorganic chemistry has its own IUPAC terminology.The official IUPAC naming standards are not usually followed in practice because it is preferable to avoid lengthy and tiresome names in everyday communication, unless it is essential to define a compound in a clear manner. When compared to older nomenclature, IUPAC names can occasionally be shorter. For example, ethanol instead of ethyl alcohol.To learn more about IUPAC refer to:
https://brainly.com/question/27802263
#SPJ1
A substance that conducts an electrical current when dissolved in water is called 1.a catalyst 4 metalloid 3 . a nonelectrolyte an electrolyte 10. Which are the relative ion concentrations in an acid solution? more H+ ions than OH" ions fewer H ions than OH- ions an equal number ofH t ions and OH- ions Ht ions but no OH- ions
When dissolved in a polar solvent, like water, an electrolyte is a chemical that results in an electrically conducting solution.
A chemical that separates into charged ions in water is called an electrolyte. The term "cation" refers to positively charged ions. Anions are the name for negatively charged ions. An electrolyte is a material that, when melted or dissolved in water, may conduct an electric current. Electrolytes are materials that disperse in water to create electrically conductive solutions. Electrolytes are materials that break down in water to produce ions. When dissolved in water, electrolytes can either be ionic compounds that break down into their component cations and anions or covalent compounds that chemically react with water to form ions (such as acids and bases).
Learn more about electrolyte here:
https://brainly.com/question/29771118
#SPJ4
Some people think that hydroelectric and solar power should be used to supply all of the electricity for the United States. Which of the following would be a flaw in this plan?
There are several places where wind power can indeed be employed. The following could pose a problem with this strategy
By wind power, what do you mean?When the breeze is used to produce mechanical or electrical energy, the process is known as wind power of wind energy. Wind turbines produce mechanical power from the kinetic energy of the wind.
Where does wind energy come from?The rotor blades of contemporary wind turbines are rotated by the wind, which transforms kinetic energy to rotational energy. A shaft that connects to the generator transfers this rotational energy, resulting in the creation of electrical energy.
To know more about wind power visit:
https://brainly.com/question/2624687
#SPJ1
Answer: its C trust
Explanation:
4. All materials are made of atoms and molecules that are always
5.
motion is
The energy of atoms and molecules due to their
is the energy carried by an electric current.
Atoms and molecules are the fundamental building blocks of all materials, and they are always in motion due to their kinetic energy.
What is kinetic energy?Kinetic energy is a type of energy that is associated with the motion of an object. It is the energy of a moving object, or the energy that an object possesses due to its motion. Kinetic energy can be calculated by multiplying half of an object’s mass by its velocity squared.
This kinetic energy is the energy carried by an electric current, which is created when the atoms and molecules move and interact with each other. This kinetic energy is the source of many of the properties of materials, such as conductivity and elasticity.
To learn more about kinetic energy
https://brainly.com/question/20005035
#SPJ1
Which formula / name pair is incorrect?
(A) NaClO sodium hypochlorite
(B) MgCO33 magnesium carbonate
(C) NH4Cl4 ammonium chloride
(D) Fe2(SO4)32(4)3 iron (III) sulfite
Option d is inadmissible. Iron(III)sulfate, not iron(III)sulfide, is Fe2(SO4)3.
Why does the body need sulfate?It fills several biological functions throughout the body and may be found in many different forms. It supports drug, food additive, and hazardous metal detoxification and is a crucial part of extracellular matrix proteins .It also prevents blood from clotting as it travels through capillaries.
FeSO3 iron(II) sulfite
⇒ Fe has an oxidation number of +2
⇒ Sulfite = SO3^2- and has an oxidation number of -2
⇒ FeSO3
Fe2 (SO4)3 iron(III) sulfide
⇒ SO4^2- has an oxidation number of 2-
⇒ Fe^3+ has an oxidation number of 3+
⇒ Fe2(SO4)3 is iron(III)sulfate not iron(III) sulfide
Option D is not correct. Fe2(SO4)3 is iron(III)sulfate not iron(III) sulfide.
To know more about sulfate visit:
https://brainly.com/question/4117459
#SPJ4
which chemical waste situation should always be supervised or performed by an instructor? note that you still may need to alert your instructor about the described incident, even if you clean it up yourself.
It is always best practice to have a qualified instructor supervise any chemical waste situation, even if you are capable of cleaning it up yourself.
This is because the instructor will be able to ensure the safety of all individuals involved and ensure that the waste is disposed of properly.
Additionally, you should always alert the instructor about any described incident, even if you are able to clean it up yourself, as this will ensure that appropriate action is taken.
When disposing of chemical waste, it is important to ensure that the waste is disposed of according to local regulations. Depending on the type of waste, there may be specific requirements for how to dispose of it safely and legally. Additionally, it is important to ensure that all containers used for storing or transporting the chemical waste are labeled properly and securely closed.
Learn more about chemical waste:
https://brainly.com/question/30322250
#SPJ4
if an individual performed 5,000 foot pounds of work in 1 minute, how many kilojoules of work were accomplished?
If an individual performed 5,000 foot-pounds of work in 1 minute, the amount of work accomplished would be 6.78 kilojoules (kJ).
This can be calculated by dividing the foot-pounds by 737.56, which is the number of foot-pounds in 1 kilojoule.
When it comes to calculating the amount of work done, it is important to use the equation W = Fd, which stands for work equals force multiplied by distance.
This equation can be used to calculate the amount of work done, and then the amount of energy transferred, when a force is applied over a certain distance. In the case of the individual performing 5,000 foot-pounds of work in one minute, the amount of work done can be calculated by multiplying 5,000 foot-pounds by the number of feet in one minute, which is 60. This will give a result of 300,000 foot-pounds of work done in one minute. To convert this to kilojoules (kJ), the result is then divided by 737.56, which is the number of foot-pounds in one kilojoule. This will give the result of 6.78 kilojoules (kJ) of work done in one minute.
Learn more about the force:
https://brainly.com/question/12785175
#SPJ4
Which set of approximate bond angles at C1, C2, and C3 of the following molecule indicates the correct shape? C3 C2 C1 NFC-CH=CH2 Select one: a. C1 180, C2 120, C3 109.5 b. C1 180, C2 120, C3 120 c. C1 120, C2 120, C3 120 d. C1 120, C2 120, C3 180
The correct set of approximate bond angles at C1, C2, and C3 of the molecule "NFC-CH=CH2" is: a. C1 180, C2 120, C3 109.5.
This molecule is a linear alkene, where the double bond (C=C) is located between C2 and C3. The bond angles reflect the shape of the molecule, which is linear. The C1 atom is bonded to two other carbons and forms a 180-degree bond angle with them, indicating a straight line. The C2 and C3 atoms, which are bonded to a carbon and a double bond, form 120-degree bond angles with each other and the neighboring carbons, again indicating a straight line. The bond angle between the two double bonded carbons (C2-C3) is slightly less than the ideal value of 120 degrees due to the pi bond between them, which pushes the atoms slightly apart. The correct set of approximate bond angles at C1, C2, and C3 of the molecule "NFC-CH=CH2" is: a. C1 180, C2 120, C3 109.5.
Learn more about molecule here
https://brainly.com/question/19922822
#SPJ4
A student plotted the movement of an object over time.
Which line segment indicates that the object is slowing down?
An object is travelling at a constant speed if the line is horizontal.Slowing down is shown by a downward-sloping line.
On a speed-time graph, how can you determine if an object is moving quickly or slowly? An object is travelling at a constant speed if the line is horizontal.Slowing down is shown by a downward-sloping line.A speed that is constant is shown as a horizontal line on a speed-time graph.On a speed-time graph, an acceleration is shown as a sloping line.A changing object's speed is shown by the sloping line.In either case, the item is changing its speed.Any curve on a position graph indicates that the velocity is changing, as well as the slope.Acceleration is implied by changing velocity.Thus, if an item is speeding and changing velocity or slope on a graph, it is curving.On the V-T graph, constant velocity is represented by a horizontal line.
To learn more about downward-sloping line refer
https://brainly.com/question/24232895
#SPJ1
what mechanism is responsible for the colour observed for vo2 and vo2 ? consider the number of d-electrons present.
D-electrons are responsible for the color that may be seen in V02+. Therefore, it possesses 6 electrons in its d-orbital, which is the same number of electrons as an electron in the d-orbital of $Fe2+$.
The Cr atomic number is 24. 22 electrons are present due to Cr+2, which results in the loss of 2 electrons. Due to this configuration, which is 1s2 2s2 2p6 3s2 3p6 3d4, the d orbital has four electrons. The third shell consists of three subshells with the letters s, p, and d. No more than 10 electrons can fit in the d subshell. Explanation: A 78-atomic-number element has a total of (1)8 d-electrons in its structure. The maximum number of electrons in the d subshell will be 10 because it has five orbitals and only two electrons can share an orbital.
Learn more about d-electrons here:
https://brainly.com/question/15578456
#SPJ4
a molecule is group of answer choices less stable than its constituent atoms separated. a combination of two or more atoms. electrically charged. none of these a carrier of one or more extra neutrons.
A molecule is a combination of two or more atoms.
A molecule is the smallest unit into which a pure substance may be divided while still retaining its composition and chemical properties, and it is made up of two or more atoms. Substances retain their chemical and physical properties even after being subdivided into smaller and smaller pieces, all the way down to the level of individual molecules. When a substance is broken down even more, the resulting fragments have different chemical properties and, in most cases, a different chemical composition. After this point, the chemical links between the atoms in the molecule are broken.
To learn more about molecule, click here:
https://brainly.com/question/29492456
#SPJ4
what is the rms speed of nitrogen molecules contained in an 8.2- m3 volume at 3.9 atm if the total amount of nitrogen is 2000 mol ?
Answer: 91910212823932
Explanation:
why is it important that k is more concentrated inside the cell and na and ca2 are more concentrated outside the cell?
It is important that K is more concentrated inside the cell and Na and Ca2 are more concentrated outside the cell because it helps to maintain the cell's resting membrane potential.
This is important in order for the cell to function properly. The resting membrane potential is maintained by the presence of ion channels in the cell membrane that allow ions to flow in and out of the cell. The concentration gradient of K, Na, and Ca2 creates a potential difference across the cell membrane, which serves as the basis of the cell's ability to generate and transmit electrical signals.
This helps the cell to communicate with other cells, which is important for normal cellular functions.
Learn more about ca2:
https://brainly.com/question/26232679
#SPJ4
A solution of potassium hydroxide
(KOH) was titrated against a solution
of hydrochloric acid. It took 35 cm³
of the hydrochloric acid to
completely neutralise 50 cm³ of
potassium hydroxide. Work out the
concentration of the potassium
hydroxide solution in mol/dm³ if the
concentration of the acid was 2
mol/dm³. Round your answer to 1
d.p.
Answer:
first you'd need to write the balanced symbol equation of the reaction between KOH and HCL which would be:
KOH+HCL-> KCL+H20
you know that 35cm^3 of 2 mol/dm^3 HCL has been used, and you need to work out the moles of the HCL from this info using the equation:
concentration(mol/dm^3 )=moles(mol)/volume(dm^3)
rearranging the equation to make moles the subject, you'd get: moles=concentration x volume
plugging in the info, you'd get moles of HCL= 35/1000 dm^3 x 2 moldm^3= 0.07 mol
because there's a 1:1 ratio of HCL:KOH, the moles of KOH would also equal 0.07 mol
now using the con equation, you'd get the concentration of KOH= 0.07mol/(50/1000) dm^3= 1.4 moldm^3
Explanation:
hope this helps and sorry if any of my calculations are wrong! you may want to double check all the calculations.
If triangle abc is isosceles where an=bc and m
△ABC is an isosceles right-angled triangle If triangle abc is isosceles where Mole an=bc and m
What is mole and its formula?One mole of any substance is equal to the value of 6.023 x 1023. It can be used to measure the products obtained from the chemical reaction. The unit is denoted by mol. The formula for the number of moles formula is expressed as. Number of Moles = Mass of substance / Mass of one mole.
What is mole explained simply?The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter. A mole is defined as the amount of substance containing the same number of discrete entitie
To know more about mole visit:
https://brainly.com/question/26416088
#SPJ1
how would you expect the entropy of a system (for example, the entropy of a kilogram of liquid water) to change if the temperature of the system is increased (no phase change occurs, just the liquid's temperature increases)?
The entropy of a system (such as a kilogram of liquid water) is a measure of the amount of thermal energy that is unavailable to do work. As the temperature of a system increases, the entropy of the system will also generally increase.
This is because as the temperature increases, the molecules in the liquid water will have more kinetic energy, which means they will move around more and have more possible microstates. This increase in possible microstates leads to an increase in entropy.
Additionally, increasing the temperature also increases the disorder of a system, as the molecules have more kinetic energy, they have more ways to distribute the energy, and the distribution becomes more random. The increase in disorder also contributes to the increase in entropy.
It's important to notice that the increase in entropy is a natural tendency of closed systems, which the second law of thermodynamics states that the entropy of an isolated system can only increase over time, it will never decrease.
The teachers added about 40 - 50 mL of ice water to the round container. The container is made of 1/8 inch thick cast iron. A lid was put on the container and tightened. The round cast iron container is placed in a metal dish that contains about 200 mL of a dry ice and acetone
what's the claim,evidence and reasoning for it
Answer:
It is not clear from the given information what the claim, evidence, and reasoning would be for this scenario. Can you provide more context or information about the purpose of the experiment or what is being observed?
why are water's chemical and physical properties so unique?
The specific heat, thermal conductivity, surface tension, dipole moment, and other properties of water are higher than those of other liquids. These makes the physical properties so unique
Water molecules have a bent overall structure, partial positive charges on the hydrogens, partial negative charges on the oxygen, and are polar. This is due to the fact that oxygen is more electronegative than hydrogen, making it more effective in drawing electrons. Excellent solvents include water. An oxygen (O) atom and two hydrogen (H) atoms make up water. Because it is bipolar, with a little positive charge on one side (where the hydrogen atoms are connected) and a slightly negative charge on the other, it is special (just oxygen). The distinctive physical characteristics of water, such as its high heat of vaporization, high specific heat, and almost universal solvent qualities, are also a result of hydrogen bonding.
Learn more about properties of water from here:
https://brainly.com/question/2602094
#SPJ4
HELP
Combustion Reactions : Fuel +O2 (g)->CO2 (g) +H2O(g)
Hexane , C6H14(l) oxygen ( g ) ->carbon dioxide ( g ) water ( g )
Combustion reactions involve the oxidation of a fuel by oxygen gas to produce carbon dioxide and water.
Combustion reactionsC6H14 (l) + 15O2 (g) -> 6CO2 (g) + 7H2O (g).In the case of hexane (C6H14), the combustion reaction is C6H14(l) + 9O2(g) -> 6CO2(g) + 7H2O(g).The hexane is oxidized by the oxygen to form six molecules of carbon dioxide and seven molecules of water.The hexane is the fuel, while the oxygen is the oxidizing agent.The reaction is exothermic and releases a large amount of energy.This energy is typically used to do work, such as heating and powering engines.Combustion reactions are important for producing energy in the form of heat, light, and motion, and are also necessary for the production of many of the materials used in everyday life.Combustion reactions involve the burning of a fuel with oxygen to produce carbon dioxide and water. In the combustion of hexane, C6H14(l), the hydrocarbon reacts with oxygen gas (O2) to produce carbon dioxide gas (CO2) and water vapor (H2O). The balanced chemical equation for this reaction is:2 C6H14(l) + 19 O2(g) -> 12 CO2(g) + 14 H2O(g).
The reaction is exothermic, meaning that heat is released when the reaction takes place. This heat helps to further break down the molecules of hexane, allowing the reaction to proceed. The reaction can be thought of as a combination of oxidation and combustion. The oxygen molecules oxidize the carbon atoms in the hexane, causing them to break down and bind to the oxygen molecules. The result is the production of carbon dioxide and water, the products of combustion. The reaction also produces large amounts of energy, which is released in the form of heat and light.To learn more about Combustion reactions refer to:
https://brainly.com/question/13251946
#SPJ1
is neutra
- On the basis of Rutherford's
model of an atom, which sub-
atomic particle is present in the
nucleus of an atom?
why is chlorine +5? It's not a balanced equation if it is 5 because the sum of the whole thing equals +4 when isn't the whole point to make it b balanced to 0
Answer:
Explanation:
KClO₃ ⇒ KCl+ O₂
Oxidation state for each oxygen in O₃ = -2. There are 3 oxygens so the total is -6 (3 x -2 = -6) .
Oxidation state for K = +1.
Solve the oxidation state for chlorine. Treat chlorine as an unknown and solve for its oxidation state using the two known oxidation values for K and O.
+1 - 6 + chlorine = 0
-5 + chlorine = 0
+5 - 5 + chlorine = 0 + 5
chlorine = +5
energy flows through our system that consists of the stove the pan the boiling water and the air around these objects which of the following statements describe it the direction that energy is moving the systems left out
Conduction, best describe the direction that energy is moving the systems left out. Energy is the ability to perform work in physics.
What is energy?Energy is the ability to perform work in physics. It might exist in several different forms, such as potential, kinetic, thermodynamic, electrical, chemical, radioactive, etc. Additionally, there is heat and work, which is energy being transferred through one body to the other. Motion is a property of all energy types. For instance, if a body is moving, it possesses kinetic energy.
Energy flows through our system that consists of the stove the pan the boiling water and the air around these objects. Conduction, best describe the direction that energy is moving the systems left out.
Therefore, conduction, best describe the direction that energy is moving the systems left out.
To learn more about energy, here:
https://brainly.com/question/29763772
#SPJ1
twenty different amino acids are found in the proteins of cells. what distinguishes these molecules
Amino acids differ from each other with respect to their side chains, which are referred to as R groups. The R group for each of the amino acids will differ in the structure, electrical charge, as well as polarity.
Amino acids are the compounds or the building blocks that make up peptides as well as proteins. Each amino acid is structured from an amino group and a carboxyl group bound to the tetrahedral carbon. This carbon is denoted as the α-carbon.
Proteins are the chains of the amino acids which is assemble via amide bonds called as peptide linkages. The difference in the side-chain group or the R-group is what determines the unique properties of each of the amino acid.
To know more about amino acids here
https://brainly.com/question/28409615
#SPJ4
one of the stable isotopes of lithium has 3 protons and 4 neutrons, so its atomic mass is 7. assume that a lithium atom initially at rest radiates a photon of energy 1.8488 ev and recoils. how long does it take for the recoiling atom to travel 1 mm? assume that the lithium atom travels in a straight line without any collisions. note: 1 amu
The time it takes for the recoiling lithium atom to travel 1 mm depends on the velocity of the atom after the photon is emitted.
The velocity of the atom can be calculated using the conservation of momentum: the momentum of the atom before the photon is emitted and the momentum of the photon must be equal to the momentum of the atom after the photon is emitted.
The mass of the lithium atom is 7 amu, and the energy of the photon is 1.8488 eV. The momentum of the photon is then given by E/c, or 1.8488eV/2.99792458e8 m/s, which is approximately 6.14e-24 kg m/s.
Assuming that the atom starts from rest, the momentum of the atom after the photon is emitted is also 6.14e-24 kg m/s. This gives us the velocity of the atom after the photon is emitted. The time it takes for the atom to travel 1 mm is then equal to the distance travelled (1 mm) divided by the velocity of the atom (6.14e-24 kg m/s). This gives us a time of 1.63e-17 seconds, or 16.3 femtoseconds.
Learn more about The velocity of the atom:
https://brainly.com/question/11865355
#SPJ4
According to law of conservation of mass, during a chemical reaction:
A
that matter can be created but not destroyed in a chemical reaction.
B
that matter can neither be created nor be destroyed in a chemical reaction.
C
that matter cannot be created but destroyed in a chemical reaction.
D
that matter can be created as well as destroyed in a chemical reaction.
B. that matter can neither be created nor destroyed in a chemical reaction. According to the law of conservation of mass, during a chemical reaction matter can neither be created nor destroyed.
What is the chemical reaction's law of mass conservation?Antoine Lavoisier discovered in 1789 that mass is neither created nor destroyed in chemical reactions, which led to the formulation of the Law of Conservation of Mass. That is to say, the mass of any one element at the start of a reaction will be equal to that element's mass after the conclusion of the reaction.
What is the first principle of mass conservation?According to the rule of conservation of mass, mass is neither generated nor destroyed during a chemical process. For instance, when coal is burned, the carbon atom in it transforms into carbon dioxide. The carbon atom transforms from a solid to a gas, yet its mass remains constant.
To know more about the conservation of mass visit:
https://brainly.com/question/27891057
#SPJ4
usually if you see oh you know you are seeing a base. what type of compound is the main exception to this rule?
The base of OH: The exceptions to this rule are metal carbonates like Na2(CO)3 and Lewis bases like amines (NH3, RNH2).
The chemical compound known as washing soda has the formula Na2CO3. 10H2O. Sodium carbonate is present as an inorganic hydrate. Its name, soda ash, comes from the fact that it was made from plants whose ashes were taken from soils rich in salt. The alkalinizing sodium salt of carbonic acid is called sodium carbonate. Sodium carbonate dissolves in water to produce carbonic acid and sodium hydroxide. Strong base sodium hydroxide acts as an antacid by neutralizing stomach acid. Due to Li's lower electropositivity than sodium's, lithium carbonate is less stable than sodium carbonate. Due to its thermal instability, lithium carbonate decomposes at lower temperatures.
Learn more about carbonates from here:
https://brainly.com/question/22530423
#SPJ4
what volume of air contains 11.9 gg of oxygen gas at 273 kk and 1.00 atmatm ? express your answer using two significant figures.
16 ml of oxygen contains 11.9 gg of oxygen gas at 273 K and 1.00 atm.
Perfect Gas Law. PV = nRT. The number of moles of a gas times a constant (R) times the temperature of the gas equals the pressure of the gas times its volume. Because it links the amount of a gas (in terms of moles) to its pressure, volume, and temperature, the ideal gas law is the last and most useful expression of the gas laws.
Using the ideal gas equation i.e
PV = nRT
where P = pressure = 1.00 atm
V = volume of gas = unknown
n = moles of gas = Given mass / molar mass
= 11.9 / 16 = 0.74 moles
R = universal gas constant =0.0821 J mol-1 K-1
T = temperature of gas = 273 K
Using the above equation we have
1 x V = 0.73 x 0.0821 x 273
volume of gas = 16.34 ml
To learn more about moles click here:
https://brainly.com/question/24191825
#SPJ4
Consider the reaction: P4(s)+6H2(g)→4PH3(g)If 90.0 L of H2(g) , measured at STP, is allowed to react with 168.5 g of P4 , what is the limiting reactant? If 39.7 L of PH3 , measured at STP, forms, what is the percent yield?
The limiting reactant is hydrogen gas (H₂).
The percent yield is 66.045%.
According to Stoichiometry
At STP V = n × 22.4
m = n × Mr
n = number of molesV = volume (L)m = mass (grams)Mr = molecular mass (g/mol)Mr is the sum of all the atomic mass (Ar)Ar P = 30.975 g/molAr H = 1The chemical reaction P₄ (s) + 6 H₂ (g) → 4 PH₃ (g)
From H₂
V = 90.0 LAt STPn = V ÷ 22.4From P₄
m = 168.5Mr = 4 × Ar PAccording to Avogadro's law the limiting reactant
H₂P₄ (s) + 6 H₂ (g) → 4 PH₃ (g)
V PH₃ = 39.7 L at STPNumber of mole PH₃ in realityThe percent yield
(mass PH₃ in reality ÷ mass PH₃ in theory) × 100%
= ((n PH₃ in reality × Mr PH₃) ÷ (n PH₃ in theory × Mr PH₃)) × 100%
= (n PH₃ in reality ÷ n PH₃ in theory) × 100%
= (1.77 ÷ 2.68) × 100%
= 0.66045 × 100%
= 66.045%
Learn more about percent yield here: https://brainly.com/question/14531883
#SPJ1
