He came to the conclusion that mass and positive charge are concentrated at the center of the atom from a small number of alpha particles deflected by huge angles with a 180.
Rutherford discovered that most positively charged alpha particles in his gold foil experiment passed straight through the foil without being deflected, leading him to believe that the majority of the atom's space is largely empty.
He came to the conclusion that mass and positive charge are concentrated at the center of the atom because there are few alpha particles that are deflected by huge angles with a 180. Rutherford Atomic Model - J. J. Thomson's "plum pudding" model was unable to account for some experimental findings related to the atomic structure of elements. British scientist Ernest Rutherford performed.
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Table 4.4 : Metals and Non-metals in Acids and Bases
S.No. Name of the Base Metal Name of the Acid Non-metal
1. Calcium hydroxide Calcium Sulphuric acid Sulphur
2
3
4
5
Answer: devide the concept
Explanation: devide and then answer it
Enrichment Activity 2.
Next up, let us compare the frequencies of different EM waves. Copy and answrr the table on page 16, refer to figure 2, then answer the question that follows.
PA HELP POOOOO
EM rays, or electromagnetic radiation, is a form of energy that is emitted and absorbed by charged particles.
What are Gamma rays?
Gamma rays are a type of electromagnetic radiation, similar to visible light and x-rays, but with much higher energy. They are produced by the hottest and most energetic objects in the universe, such as neutron stars, pulsars, and black holes. Gamma rays can also be produced artificially, in particle accelerators or nuclear reactions. Gamma rays have the shortest wavelength and highest energy of any type of electromagnetic radiation.
| Wave | Frequency (Hz) |
| Radio Waves | < 3 x 10^9 |
| Microwaves | 3 x 10^9 |
| Infrared Radiation | 3 x 10^12 |
| Visible Light | 4 x 10^14 |
| Ultraviolet | 7.5 x 10^14|
| X-Rays | 3 x 10^16 |
| Gamma Rays | 3 x 10^19 |
Which type of EM wave has the highest frequency?
Gamma Rays have the highest frequency with 3 x 10^19 Hz.
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Select True or False: When lead-209 undergoes beta decay the balanced nuclear equation for this reaction is:
The statement is False, when lead-209 undergoes beta decay. As the nuclear equation is n ---> p + e- + antineutrino.
Lead-209 is an atom that contains 82 protons and 127 neutrons in its nucleus, meaning that lead-209 is not a neutron. Neutrons are particles that are found in the nucleus of atoms and have no charge. Therefore, lead-209 can't undergo beta decay by emitting a neutron. Beta decay occurs when an unstable nucleus emits a beta particle and an antineutrino, changing the number of protons in the nucleus. The balanced nuclear equation for the beta decay of lead-209 would be Pb-209 (atomic number = 82) --> Bi-209 (atomic number = 83) + e- + antineutrino. The Bi-209 is a isotope of bismuth, which has one more proton than lead-209 and the same number of neutrons.
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Question-- Select True or False: When lead-209 undergoes beta decay the balanced nuclear equation for this reaction is: n ---> p + e- + antineutrino
Choose correct reagent(s) for the conversion below q2 A. a) propyl bromide / AlCl3 b) NBS B. a) propyl bromide / AlCl3 b) Br2 / heat or light C. a) propanoyl chloride with (1) AlCl3 and (2) H2O b) NBS D. a) propanoyl chloride with (1) AlCl3 and (2) H2O b) Br2 / heat or light E. a) Br2 / FeBr3 b) (propyl)2CuLi c) Br2 / light or heat
D. a) propanoyl chloride with (1) AlCl3 and (2) H2O b) Br2 / heat or light.
What is a reagent?
A reagent is a substance that is used in a chemical reaction to detect, measure, examine, or produce other substances. Reagents are used in many different industries, including pharmaceuticals, environmental testing, and materials science. Reagents can be in the form of a solid, liquid, or gas, and are generally made from a combination of elements, compounds, or mixtures.
a) The reaction of propanoyl chloride with AlCl3 and H2O can be represented as follows:
AlCl3 + H2O + Propanoyl Chloride → Al(OH)3 + HCl + Propanoic Acid
This reaction involves substitution of the chlorine atom in the propanoyl chloride molecule with a hydroxide ion from the AlCl3/H2O mixture.
b) Br2 / heat or light cannot be used to react with propanoyl chloride, as this reaction would require the breaking of the carbon-chlorine bond. This is not possible using Br2 / heat or light.
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What is the most common irony?
In literary classes, the three most popular types are verbal irony, dramatic irony, and situational irony. When a speaker or narrator says something that contradicts what they mean, what they intend, or what the context necessitates, this is called verbal irony.
What is irony?One thing is expressed while another is meant in an ironic statement. For example, on a chilly, wet gray day, you would exclaim, "What a gorgeous day!" Alternatively, if you were suffering from a severe case of food sickness, you may respond, "Wow, I feel terrific today." "ffers points of view and ideas that are, at most, intriguing... However, it does not reach the truth." Ronagh and Souder are particularly concerned with scientific assertions that are not meant to be taken seriously.
Here,
The three most common varieties in literary studies are verbal irony, dramatic irony, and situational irony. Verbal irony occurs when a speaker or narrator says something that contradicts what they mean, what they intend, or what the context requires.
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how could you use this pattern to predict how the element may behave in a chemical reaction
Answer:
it can predict the properties of new elements, because it organizes the elements according to their atomic numbers.
Creating new elements is not a simple process. Scientists use a particle accelerator to smash light atoms into a thin metallic foil that contains heavier atoms. They hope that the two nuclei at the centre of these atoms will fuse and form a heavier nucleus.
When these heavy elements form, they are usually highly unstable. They decay so quickly that we don’t usually see the element itself. Instead, we see a decay product. In that respect, even new elements aren't always 'discovered' directly. In some cases, scientists haven’t synthesized enough of the element for us to know what the element even looks like! Nevertheless, we consider the elements as known. We name them and list them the periodic table.
For example, in 2003, scientists first observed element 115 (ununpentium, Uup) They bombarded americium-243 with calcium-248 ions and produced four atoms of Uup, which lived for less than one fifth of a second.
₂₀ ⁴⁸Ca + ₉₅²⁴³Am → ₁₁₅²⁸⁸Uup + 3 ₀¹n
It took until September 2013 for the discovery to be confirmed, and about 50 atoms have been synthesized to date.
We can predict the properties of Uup because the Periodic Table organizes elements according to their atomic number.
6.0 mol Al reacts with 4.0 mol O2 to form Al2O3.
4A1+30₂ → 2Al₂O3
How many moles of Al2O3 form when 4.0 mol Al reacts?
2 moles of Al₂O₃ will be produced when 4 moles of Al reacts in accordance with the above equation.
How to calculate moles using stoichiometry?Stoichiometry refers to the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).
According to this question, 6.0 moles of Al reacts with 4.0 mol of oxygen gas to form Al₂O₃ as follows:
4Al + 30₂ → 2Al₂O₃
Based on the above equation, 4 moles of Al reacts to form 2 moles of aluminium oxide.
This means that 4 moles of aluminium will produce 4 × ²/4 = 2 moles of aluminium oxide.
Therefore, 2 moles of Al₂O₃ will be produced by 4 moles of aluminium.
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What can be found in the box on a periodic table?
In the box on a periodic table we can find its atomic number, symbol, average atomic mass, and (sometimes) name of the element.
By the 20th century, it was clear that atomic numbers, not atomic masses, were involved in the periodic relationship. The periodic law, a more recent formulation of this relationship, states that an element's properties are a periodic function of its atomic number.
The elements are arranged in a modern periodic table in increasing order of their atomic numbers, and atoms with comparable properties are grouped in the same vertical column (Figure below). With its atomic number, symbol, average atomic mass, and (sometimes) name, each box represents an element. The elements are grouped in 18 vertical columns called groups and seven horizontal rows known as periods or series.
Each column's header lists the names of its groups. Roman numerals and capital letters have traditionally been used on labels in the United States. The IUPAC advises using the digits 1 through 18, and these labels are more widely used. Parts of two of the rows, totaling 14 columns, are typically written below the table's main body in order for it to fit on a single page.
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How many moles of sulfuric acid (H₂SO4) are needed to react completely with 6.8 moles of lithium hydroxide (LIOH)?
2LIOH + H₂SO4 → Li2SO4 + 2H₂O
O 3.4 mol H₂SO4
O 6.8 mol H₂SO4
O 10.2 mol H₂SO4
O 13.6 mol H₂SO4
3.4 mole of H₂SO₄ moles of sulfuric acid (H₂SO4) are needed to react completely with 6.8 moles of lithium hydroxide.
How many moles of sulfuric acid (H₂SO4) are needed ?
Based on the reaction’s stoichiometry: 2 LiOH + H2SO4 Li2SO4 + 2 H2O
It is obvious that when 2.0 moles of LiOH react with 1.0 mole of H2SO4, 1.0 mole of Li2SO4 and 2.0 moles of H2O are produced.
Making use of cross multiplication:
1.0 mole of H2SO4 totally interacts with LiOH (2.0 moles)
2.0 mole of H2SO4 is required to totally react with 6.8 mole of LiOH.
The mole of H2SO4 = (1.0 x 6.8) / (2.0) = 3.4 mole of H2SO4.
One mole of H2SO4 has an atomic mass of 98 grams. So 98 grams of H2SO4 comprises one mole of H2SO4 molecule, or seven moles of atoms.
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Show the more stable carbocation that forms through a 1. 2−shift. Be sure to answer all parts. Part 1 out of 2 Show the more stable carbocation that forms through a 1,2-shift.
Be sure to answer all parts. Part 1 out of 2 Show the more stable carbocation that forms through a 1,2-shift.
The more stable carbocation that forms through a 1,2-shift is a tertiary carbocation.
A 1,2-shift is a rearrangement of a carbon-carbon double bond, where one of the carbons moves two positions away from its original location with its original bonding partner following it. This creates a carbocation intermediate, with the carbon that moved being the positively charged center. Since tertiary carbocations are the most stable of the carbocation intermediates, the more stable carbocation that forms through a 1,2-shift is a tertiary carbocation.
The more stable carbocation that forms through a 1,2-shift is a tertiary carbocation.
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What is the net charge on the following peptide at pH = 0?
Peptide sequence: DSVK
a. net charge = +2
b. net charge = +1
c. net charge = 0
d. net charge = -2
The net charge on the Peptide sequence: DSVK at pH = 0 is : a. net charge = +2.
What is peptide sequence?The process of identifying the amino acids that make up a peptide chain's structural sequence is known as peptide sequencing. This knowledge must be made public in order to understand the structure and function of a protein within a cell, which is useful for biomedical research applications.
By convention, the names of peptides are always written from left to right, beginning with the N-terminal end. For example, the name glycyl-histidine-phenylalanine refers to a peptide that comprises glycine at the N-terminus, followed by a histidine, and then phenylalanine at the C-terminus.
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You move a 12-newton box 6 meters across the floor. How much work have you done?
The amount of work that has been done would be 72 Joules.
What is work done?The work done by a body can be defined as the amount of energy transferred from one body to another body. In other words, work is the product of force and the distance moved by the force.
This can be expressed mathematically as:
Work = force x distance moved by the force.
In this case:
Force = 12 newton
Distance = 6 meters
Work done = 12 x 6
= 72 NM or 72 Joules
In other words, if I move a 12 Newton box by 6 meters across the floor, the amount of work done would be 72 Joules.
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which type of reaction is represented by the generic equation AB+CD --->AD+CB?
combustion
decomposition
single replacement
double replacement
Answer:
4. Double replacement
Explanation:
The generic equation shows that two compounds are being swapped, which is an indication of a double substitution reaction.
Correct answer double replacement.
So the correct answer is D) Double replacement.
The following reaction shows the products when sulfuric acid and aluminum hydroxide react.
2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O
The table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory.
What is the approximate amount of the leftover reactant?
11. 73 g of sulfuric acid
10. 33 g of sulfuric acid
11. 12 g of aluminum hydroxide
13. 67 g of aluminum hydroxide
The remaining reactant (Aluminum Hydroxide) weighs approximately 11.73 g.
Hence, Option A is correct.
Al(OH)3 has a molar mass of 78 g.H2SO4 has a molar mass of 98 g.Given:Al(OH)3 mass = 30gH2SO4 mass = 35gAl number of moles (OH)3 = 30/78 =0.385H2SO4 mole number = 35/98 = 0.357The provided reaction states that 2Al(OH)3 + 3H2SO4 Al2 (SO4)3 + 6H2OAl, 2 moles (OH)H2SO4 is equal to 3 moles.Al 1 moles (OH)H2SO4 is equal to 3/2 moles.Al 0.385 moles (OH)0.578 moles of H2SO4 are equal to 3 = (3/2) x 0.385 moles of H2SO4.But the amount of H2SO4 is only 0.357 moles.H2SO4 is the limiting reagent as a result.Al(OH)3 is produced when 0.357 moles of H2SO4 react with = 2/3 x 0.357 moles of Al(OH)3.Al(OH)3 leftovers are therefore 0.147 moles (0.385 - 0.238 moles).Al(OH)3 has a molecular weight of 78 g, hence 78 x 0.147 g is one mole.= 11.43 g11.73 g of Al(OH)3 will be left behind as a result.To know more about limiting reagent here
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What is a measuring stick called?
A measuring stick called meterstick or yardstick.
A meterstick or yardstick is either a foldable ruler or straightedge which is used to measure the length and it is specially common in the construction industry. Meterstick are made up of plastic or A measuring stick called meterstick or yardstick.
A meterstick or yardstick is either a foldable ruler or straightedge which is used to measure the length and it is specially common in the construction industry. Meterstick are made up of plastic or wood and they often have a metal or plastic joints so that they can be folded together. Metersticks are often rectangular and thin. Metersticks are divided with lines for each millimeter and numerical markings per centimeter. Whereas, yardsticks are often marked with a scale in inches. Measuring stick is also known as ruler. For example: We measure the diameter of a circle with a ruler, and also draw a perfectly straight line using its edge.
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The Ka values for nitrous acid HNO_2 and hypochlorous HClO) acid are 4.5 10^{-4} and 3.0 10^{-8}, respectively.
A,Which one would be more suitable for use in a solution buffered at pH = 7.0?
B, What other ion would be needed to make the buffer?
Nitrous acid HNO_2 would be more suitable for use in a solution buffered at pH = 7.0.The other ion needed to make the buffer would be the conjugate base of the acid, which in this case would be the nitrite ion NO_2^-.
A, The Ka value is an indication of the strength of an acid; the lower the Ka value, the weaker the acid. Therefore, the hypochlorous acid HClO has a weaker acidity than nitrous acid HNO_2 and would be less suitable for use in a solution buffered at pH = 7.0.
B, Buffers work by maintaining a certain pH by providing a source of a weak acid and its conjugate base. Therefore, the other ion needed to make the buffer is the conjugate base of the acid, which in this case is the nitrite ion NO_2^-.
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What are the 6 Types of preservatione
Drying and fermenting are two of the earliest techniques for food preservation. Replacement, recrystallization, permineralization, and unaltered
The term "preservation" refers to all of the procedures used to extend the useful life of archival records. The goal of preservation efforts is to stop information from being lost and to reduce physical and chemical deterioration of documents. You can manage the components in your food and consume healthy food all year round by canning, drying, and freezing.
The obvious goals of conservation are the protection of wildlife and the advancement of biodiversity. The animals we adore won't vanish into oblivion by being protected and preserved for future generations. And we can keep the ecosystem in good shape and working properly.
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The correct question is as follows
What are 6 types of preservations ?
Consider the orbital diagram
shown. Which electron rule is
broken in the diagram?
1
1s 2s
2p
A. Aufbau Principle
B. Hund's Rule
C. Pauli Exclusion Principle
Answer: Aufbau Principle
Explanation:
Aufbau Principle - states that lower energy orbits must be completely filled before moving onto a higher energy level
Hund's Rule - pairing rule; all boxes in the level must be given one arrow before adding a second arrow
Pauli Exclusion Principle - each box must contain two arrows pointing in different directions
This question doesn't completely fill the 1s level before moving onto the next 2s level. Therefore, the digram violates the Aufbau Principle.
Draw the organic product of the following reaction between (1s 3s)-1-chloro-3-methylcyclopentane
Whenever we need to find the purity of a combination of two metals, which is known as an alloy, we use the simple formula where we find the weight of the main compound in the numerator and the weight of the total alloy In the denominator. Multiplying this by hundred gives us the purity of the metal. This is extensively used to calculate the purity of silver and gold.
N2 + 3H2 → 2NH3
How many moles of hydrogen, H2, are needed to react with 28 moles of nitrogen, N2?
(round the the tenth's place)
Taking into account the reaction stoichiometry, an amount of 84 moles of H₂ are needed to react with 28 moles of nitrogen.
Reaction stoichiometryIn first place, the balanced reaction is:
N₂ + 3 H₂ → 2 NH₃
By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:
N₂: 1 moleH₂: 3 molesNH₃: 2 molesMass of N₂ requiredIt can be applied the rule of three: If by reaction stoichiometry 1 mole of N₂ react with 3 moles of H₂, 28 moles of N₂ react with how many moles of H₂?
moles of H₂= (28 moles of N₂×3 moles of H₂)÷1 mole of N₂
moles of H₂= 84 moles
Finally, 84 moles of H₂ reacted.
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Which of the following are advantages of a furnace over a flame in atomic absorption?
a. a smaller sample amount is required
b. memory effects from the previous run are not present in even the most basic version
c. the sample is atomized in only one heating step
d. less operator skill is required to determine the proper experimental conditions
e. higher sensitivity because the atomized sample is in the optical path longer
A furnace has an advantage over a flame in atomic absorption because it is more sensitive due to the lengthier time the atomized material remains in the optical path.
A process of absorption is what?Absorption in chemistry is the process by which a material that is already present in one state gets assimilated into another substance that is already present in another state (e.g., gases being absorbed by a liquid or liquids being absorbed by a solid).
What in chemistry are adsorption and absorption?Absorption and adsorption have quite different definitions. A liquid can be absorbed by a substance like a sponge, cloth, or filter paper. The absorbent substance absorbs all of the liquid. Adsorption describes the accumulation of single molecules, atoms, or ions on surfaces.
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If 1.70g of aniline reacts with 2.10g of bromine, what is the theoretical yield of 4-bromoaniline (in grams)
If 1.70g of aniline reacts with the 2.10 g of bromine, the theoretical yield of 4-bromoaniline is 2.25 g.
1 mole mole of the aniline react with the 1 mol of Br₂ produces 1 mole of the 4 - bromoaniline.
mass of aniline = 1.70 g
molar mass of aniline = 93 g/mol
moles of aniline = 0.0182 mol
mass of Br₂ = 2.10 g
molar mass of Br₂ = 160 g/mol
moles = 2.10/ 160
= 0.0131 mol
Br₂ is limiting reagent .
moles of 4-bromoaniline = 0.0131
mass of 4-bromoaniline = moles × molar mass
= 0.0131 × 172
= 2.25 g
Thus, the theoretical yield is 2.25 g.
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Where do the 2 ATP produced in fermentation come from?
Glycolysis during fermentation only yields two ATP each glucose molecule, which is significantly less ATP than is produced during respiration.
What distinguishes a compound from a molecule?A collection of more than two atoms joined by chemical bonds is referred to as a molecule. The compound is a mixture made up of two or more distinct kinds of elements that are chemically combined in a predetermined ratio. Not every molecule is a compound. Molecules make up all chemicals.
Just how many atoms make up a molecule?According to the context, it term might or might not include ions that meet this requirement. A molecule is a collection of atoms that are held together by the attractive forces called as chemical bonds.
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Solid silicon and solid magnesium chloride form when silicon tetrachloride gas reacts with magnesium metal. Write a word equation and an unbalanced formula equation including physical states.
Solid silicon and solid magnesium chloride form when silicon tetrachloride gas reacts with magnesium metal. the equation is :
SiCl₄(g) + Mg(s) ---> Si(s) + MgCl₂(s)
When the solid silicon react with the solid magnesium chloride , the word equation is :SiCl₄(g) + Mg(s)
the product formed is the silicon tetrachloride gas. the word equation is :
Si(s) + MgCl₂(s)
The unbalanced equation is :
SiCl₄(g) + Mg(s) ---> Si(s) + MgCl₂(s)
The balanced equation for the reaction of the silicon tetra chloride react with the magnesium and form the silicon and the solid magnesium chloride. and t is given :
SiCl₄(g) + Mg(s) ---> Si(s) + MgCl₂(s)
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How many moles are in 4.0 x 10^24 atoms of silicon?
Atoms of silicon have 0.15 moles.
[tex]4.0 × 10^2^4[/tex] atoms of silicon.
We have to find the number of moles.
Silicon has the atomic number 14.
One mole of silicon contains [tex]6.023× 10^2^3[/tex] atoms.
[tex]6.023× 10^2^3[/tex]number of atoms are present in one mole of silicon.
[tex]4.0*10^24[/tex]number of atoms will have-
[tex]6.023*10^2^3/4.0*10^2^4=0.15[/tex] moles.
Thus atoms of silicon have 0.15 moles.
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I’ve tried to do the problem but it’s confusing
Answer:
Explanation:
The equation for calculating the amount of heat released is:
q = mcΔT
where:
q = heat released (in joules)
m = mass of the substance (in grams)
c = specific heat capacity (in J/g·°C)
ΔT = change in temperature (in degrees Celsius)
Given:
m = 30 g
ΔT = 96°C - 25°C = 71°C
c = 4.184 J/g·°C (for water)
so
q = (30 g)(4.184 J/g·°C)(71°C) = 8.91*71 = 635.11 J
Therefore, 635.11 J of heat is released when 30g of water cools down from 96 degree celsius to 25 degree celsius
Note that this calculation is valid only if the process is adiabatic or no heat is exchanged with the environment.
Select True or False: As opposed to chemical reaction, nuclear reactions have a significant (measureable) mass change relative to the mass of the reacting species.
The given statement is true as in the radioactive decay results in significant mass loss.
When uranium nuclei go through radioactive decay, a number of their mass is transformed into kinetic energy (the electricity of the transferring particles). This conversion of electricity is determined as a lack of mass. When it decays, a radionuclide transforms right into a one-of-a-kind atom - a decay product. The atoms maintain remodeling to new decay merchandise till they attain a solid country and are now not radioactive. This radioactivity is a part of earth's herbal device and is the principle purpose of warmth in the earth and the using pressure for earth's tectonic device which results in volcanoes, earthquakes and plate tectonics.
Thus, the given statement is true.
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What determines the properties of a substance?
The properties of a substance are determined by the arrangement of atoms in that substance.
A substance has two types of properties: physical and chemical properties.
The physical properties of a substance does not change the physical identity of the substance.
Examples of physical properties are density, color, boiling point, melting point and hardness.
Whereas the chemical properties are those properties which alter the substance completely and transforms it into a new substance or a compound.
For example, chemical reactions such as oxidation or reduction reactions, corrosion and flammability are chemical properties which occur when change in the arrangement of atoms take place.
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The normal boiling point of Br2(l) is 58.8 ?C, and its molar enthalpy of vaporization is ?Hvap = 29.6kJ/mol.
When Br2(l) boils at its normal boiling point, does its entropy increase or decrease?
increase
decrease
When Br2(l) boils at its normal boiling point, its entropy increases as it is positive.
What is meant by entropy?The level of randomness found inside a substance's molecules is known as entropy.
The temperature at which atmospheric pressure and a liquid's vapor pressure are equal is known as the boiling point.
The amount of heat energy required to convert one mole of a substance from its liquid state into its gaseous state at constant temperature and pressure is referred to as the molar enthalpy of vaporization.
Entropy increases when a liquid is heated because the randomness between the molecules increases. As a result, entropy will rise.
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Calculate the mass of metal oxide produced during the decomposition of 1280 g of 77.5% pure magnesium carbonate!
Decomposition of one mole of magnesium carbonate (84 g) produces one mole of magnesium oxide (40 g). Thus, 1280 g of magnesium carbonate will produce 609 g of MgO.
What is magnesium carbonate?Magnesium carbonate is an ionic compound formed by donation of two electrons from magnesium metal to the carbonate group.
The decomposition reaction of magnesium carbonate is written below:
[tex]\rm MgCO_{3} \rightarrow MgO + CO_{2}[/tex]
As per this reaction, one mole of magnesium carbonate produces one mole of MgO.
molar mass of MgCO₃ = 84 g/mol
molar mass of MgO = 40 g/mol
84 g of MgCO₃ gives 40 g of MgO. Then the mass of MgO produced by 1280 g of MgCO₃ is:
mass of MgO = (1280 × 40)/84 = 609 g.
Therefore, the mass of MgO produced is 609 g.
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