As a result of photosynthesis the level of CO₂ decrease and the the level of o2 increase in the environment.
Photosynthesis is a chemical process that occurs in algae, plants and some types of bacteria, when they are exposed to the sunlight. During photosynthesis, water and carbon dioxide will combine to form carbohydrates and gives off oxygen.
During photosynthesis, plants take carbon dioxide from the air. Within the plant cell carbon dioxide is reduced, meaning it gains electrons. This transforms the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules.
Photosynthesis increases the content of the non-structural carbohydrates in the leaves which can lead to grater starch reserves and increased auxin biosynthesis.
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Does a meter stick measure distance?
Inside the metric system, length as well as distance were two of the most significant metrics. Measurement of length and distance can be done in a variety of ways.
Using a metre stick is among the most popular methods for gauging these amounts.
A meterstick, meterstick, nor yardstick consists of either a straightedge as well as foldable ruler was using to measure length, and therefore is notably common inside the construction business. They frequently consist of wood as well as plastic, and their joints frequently consist of plastic as well as metal to allow for folding.
A metre stick is a highly helpful tool in science that is exactly one metre long. A metre stick can be used to gauge items and distances that are both less than as well as longer than one metre.
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What quantity of energy does it take to convert 0.562 kg ice at −20.0°C to steam at 250.0°C? Specific heat capacities: ice, 2.03 J/g·°C; liquid, 4.18 J/g·°C; steam, 2.02 J/g·°C; ΔHvap = 40.7 kJ/mol; ΔHfus = 6.02 kJ/mol.
The quantity of energy required to convert 0.562 kg ice at -20.0°C to steam at 250°C is equal to 1885.4 KJ.
What is the specific heat capacity?The specific heat capacity can be described as the amount of energy needed to raise the temperature in one unit of material by one-degree celsius.
The addition or emission of heat from the system will the temperature of the substance will be changed:
Q = mCΔT
Given, the amount of ice, m = 0.562 Kg = 562 g
The change in the temperature = 100 -20 = 80°C
The specific heat capacity of the water, C = 4.18J/g°C
The specific heat capacity of the ice, C = 2.03 J/g°C
The phase transition from ice to steam:
H₁ = 562 × 2.03 × (0-(-20))
H₁ = 22,817 J = 22.8 KJ
The enthalpy of the fusion will be absorbed:
H₂ = n × H(fus)
The number of moles of water = 562/18 = 31.22 mol
H₂ = 31.22 × 6.02 kJ/mol
H₂ = 187.95 KJ
Phase transition from water at 0°C to water at 100°C:
H₃ = 562 × 4.18 × 100
H₃ = 234 KJ
The phase transition from water at 100°C to steam at 100°C:
H₄ = n × H(vap)
H₄ = 31.22 × 40.7 kJ/mol
H₄ = 1270.65 KJ
The heat to make steam at a temperature of 250°C:
H₅ = m × S×ΔT
H₅ = 562 × 2.02 ×150 = 170 KJ
The total energy needed to convert 0.562 kg ice at -20.0°C to steam at 250.0°C:
H = H₁ + H₂+ H₃+ H₄ +H₅
H = 1885.4 KJ
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Express the composition of each compound as the
mass percent of its elements (percent composition).
a.
sucrose (C,H),0.,)
c. magnetite (Fe,O.)
b.
aluminum sulfate
(Al, (SO,).)
The composition of each compound as the mass percent of its elements is as follows:
For Sucrose - Carbon is 42.18%, Hydrogen is 6.44% and Oxygen is 51.38%.For Aluminum sulfate - Aluminum is 3.99%, Sulfur is 4.57% and Oxygen is 87.44%.For Magnetite - Iron is 71.83% and Oxygen is 28.17%.What is mass percent?Concentration is expressed as mass percent. Additionally, the ingredients in a particular mixture are described. Solution composition can be understood in terms of mass percent. It indicates the mass of solute present in a solution of a given mass. The amount of solute is expressed in mass or moles.
Mass Percent = (Component Mass ÷ Total Mass) x 100% or
(mass of solute ÷ mass of solution) x 100%
a. Sucrose (C₁₂H₂₂O₁₁) with molecular mass of 342.296 u composed of:
Carbon: (12 x 12.01) / 342.296 = 42.18%
Hydrogen: (22 x 1.01) / 342.296 = 6.44%
Oxygen: (11 x 16) / 342.296 = 51.38%
b. Aluminum sulfate (Al₂(SO₄)₃) with molecular mass of 342.14 u is composed of:
Aluminum: (2 x 26.98) / 342.14 = 3.99%
Sulfur: (3 x 32.06) / 342.14 = 4.57%
Oxygen: (18 x 16) / 342.14 = 87.44%
c. Magnetite (Fe₃O₄) with molecular mass of 231.534 u is composed of:
Iron: (3 x 55.85) / 231.534 = 71.83%
Oxygen: (4 x 16) / 231.534 = 28.17%
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Photosynthesis Notes
1. Give the Greek root word meaning for photoautotroph.
2. What was von Helmont testing with his willow tree experiment? What was the result?
3. Define the law of conservation of mass.
4.
Describe the experiment used by Joseph Priestly to discover oxygen.
5. List the primary constituents of air.
a.
b.
C.
d.
e.
6. What did Jan Ingenhousz discover about plants?
7. Based on the work of Nicolas de Saussure, what are the two primary sources of mass for
plants?
8. Define photosynthesis-
9. Define potential energy-
Photoautotroph has been derived from the combination of three words, photo -meaning "light", autos- meaning "self", and troph meaning "nutrition".
Land plants and photosynthetic algae are both photoautotrophs. These species contain pigments that can capture light, like chlorophyll. Origin of the word: photo- (light) + auto (self) + troph (nourishment). Autotrophs known as photoautotrophs generate complex chemical substances like proteins, lipids, and carbohydrates by absorbing light. Photosynthesis is the name given to this light-mediated process.
An energy-rich carbohydrate like glucose is produced by plants using carbon dioxide, inorganic salts, and water during a process called photosynthesis. As a byproduct, oxygen is also produced, other than glucose. Land plants and photosynthetic algae are both photoautotrophs. These species contain pigments that can capture light, like chlorophyll.
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How many electrons are neutral in c14?
Neutral carbon-14 contains six electrons, six protons, eight neutrons.
- The smallest particle that may exist, an atom, is what creates the entire cosmos. It has a core nucleus that houses the neutral species known as neutrons and positively charged species known as protons.
The orbit of the nucleus is being circled by negatively charged species of electrons. The atomic number of an atom is determined by its protons, and the number of protons is always equal to the number of electrons.
The carbon-14 in this instance is an isotope of carbon-12 with a mass number of 14. Atomic number six carbon has a total of six protons and six electrons.
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Fictitious element X has an average atomic mass of 122. 131 u. Element X has two naturally occuring isotopes. The most abundant isotope has an isotopic mass of 121. 552 u and a relative abundance of 61. 35%. Calculate the isotopic mass of the least abundant isotope
The isotopic mass of the least abundant isotope will be 123.05 u.
Average atomic mass of X = 122.131 u
Assume most abundant isotope = Y and least abundant isotope = Z
Relative abundance (Y) = 61.35%
So,
Z = 100 - 61.35
Z = 38.65 %
Isotopic mass of Y= 121.552 u
Isotopic mass of Z = ?
To calculate the isotopic mass we use the following formula:
Average atomic mass = [(mass Y × percent abundance) + (mass Z × percent abundance)] / 100
put the values
122.131 = [(121.552 × 61.35) + (Z × 38.65)] / 100
12213.1 = (7457.22) + (Z × 38.65)
Z × 38.65 = 12213.1 - 7457.22
Z × 38.65 = 4755.88
Z = 4755.88 / 38.65
Z = 123.05
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There are 20 mg of cromolyn sodium in 2 ml of normal saline. What is the percentage strength of the solution
The percentage strength of the solution is 1%.
According to question,
we are given that the 20mg of cromolyn sodium in 2 ml of normal saline is taken.
Now, to find the percentage strength first know the meaning of percentage strength.
The amount of solute dissolved in gram per liter of the solution is used to determine the solution's strength. It stands for the solution's potency or concentration. It uses gram per liter of expression.
Now here we are given the the mass and volume connection so we have to find the percentage in terms of it.
percentage strength=[tex]\frac{mass}{volume} *100[/tex]
percentage strength=[tex]\frac{0.020*100}{2}[/tex]
on solving we get,
percentage strength=1%
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7. Explain the role of the digestive system in animals, as well as how the system works! PLEASE I WILL GIVE BRAINLIEST
If 6.4 g solid carbon dioxide were placed in the same container but it already contained air at 740 torr, what would be the partial pressure of carbon dioxide, PCO2
Given data
Mass of the piece of a solid carbon dioxide is m = 6.8 g
Volume of the solid carbon dioxide is V=4L
The temperature is T = 23°C = 296 K . The pressure of the air in the container is
740 Pho = 740 torr = atm 76
The temperature is T = 23 deg * C = 296K
The pressure of the air in the container is
Pho = 740 torr 740 760 atm
(a)The expression of ideal gas equation is given by,
PV = nRT
PV = (m/M) * RT
Where, P is the pressure in which the container after all the carbon dioxide is vaporizes.
M is the molar mass of the solid carbon dioxide (M = 44.01g / m * ol)
R is the universal gas constant R = (0.0832kJ / m * olK)
Substitute the all values in the above equation and calculate the value of pressure in which the container after all the carbon dioxide is vaporizes.
6.8 g 44.01 g/mol P(4L)= P= (0.0832 kJ/mol K) (296 K) (0.1545 mol) (0.0832 kJ/mol K) (296 K)
P = 0.951atm
(4L)Thus, the pressure in which the container after all the carbon dioxide is vaporizes is 0.951 atm.
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We observe that 0.123 mole of the element bromine combines with 0.123 mole of the element lead to form a compound. What is the empirical formula for the compound?
The empirical formula of the compound with 0.123 moles of bromine and 0.123 moles of lead would be PbBr.
Empirical formula determinationThe empirical formula of a compound is the chemical formula of the compound where the component atoms are in their simplest, whole-number ratios.
In this case, the compound contains bromine and lead:
Br = 0.123 mole
Pb = 0.123 mole
Dividing through by the smallest mole
Br = 0.123/0.123 = 1
Pb = 0.123/0.123 = 1
Thus, bromine and lead are present in a 1:1 ratio in the chemical formula.
In other words, the empirical formula of the compound containing 0.123 moles of bromine and 0.123 moles of lead is PbBr.
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If I contain 5 moles of gas in a container with a volume of 62 liters and at a temperature of 222 K, what is the pressure inside the container?
The pressure inside the container with 5 moles of gas, 62 liters volume and 222K temperature is 1.46 atm.
Ideal gas law illustrates the relation between pressure, volume and temperature of a gas. It is represented by the equation
PV = nRT
Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant and T is the temperature.
V = 62 liters
n = 5 moles
R = 0.0821 L(atm) mol⁻¹K⁻¹
T = 222K
PV = nRT
P × 62 = 5 × 0.0821 × 222
P = 5 × 0.0821 × 222/62
P = 1.46 atm
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What are the 4 parts of an element box?
The element box contains name and symbol of the element, number of protons and electrons, atomic mass, and electron configuration.
Each key incorporates an detail's name, precise symbol, atomic weight and atomic variety. Oxygen, for example, has an atomic variety of 8, an atomic weight of 15.996 and a completely unique symbol, O. Each container represents an detail and incorporates its atomic size, symbol, common atomic mass, and (sometimes) name. The factors are organized in seven horizontal rows, referred to as intervals or series, and 18 vertical columns, referred to as groups. The container containing every detail's records is called the detail key. The table is split into 4 more or less square regions referred to as blocks. The rows of the desk are referred to as intervals, and the columns are referred to as groups. Elements from the equal institution of the periodic table display comparable chemical characteristics.
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4 P (s) + 5 O2 (g) -> P4O10 (s)
If 0.554 mol of phosphorus burns, what mass of oxygen is used?
MassMass of oxygen used on combustion of 0.554 mol of phosphorus is 957.12 g.
What is combustion?Combustion is the name given to the chemical reaction in which a material combines with oxygen to produce heat. A substance is said to be combustible if it can burn. Another name for it is fuel. Fuel can be either solid, liquid, or gaseous.
Since, 4 moles of phosphorus burns in the presence of 5 moles of oxygen
Therefore, 0.554 moles of phosphorus will burn in presence of 54×0.554=29.91 moles of oxygen.
Molar mass of oxygen is 32 g/mol.
Hence, mass of oxygen used can be calculated by:
Mass of oxygen used under given reaction conditions =32×29.91⇒957.12 g.
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Mass of oxygen used on combustion of 0.554 mol of phosphorus is 957.12 g. Oxygen has an atomic mass of 15.9994. ss.
What is combustion?Combustion is the name given to the chemical reaction in which a material combines with oxygen to produce heat. Another name for it is fuel. Fuel can be either solid, liquid, or gaseous.
What is combustion of phosphorus?4 moles of phosphorus burns in the presence of 5 moles of oxygen 0.554 moles of phosphorus will burn in presence of 54×0.554=29.91 moles of oxygen. Molar mass of oxygen is 32 g/mol. Mass of oxygen used under given reaction conditions 32×29.9 = 957.12 g.
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A chemical supply company sells sulfuric acid (H2SO4) in a concentration of 4.00 M. What volume of this solution would you need to make 12.0 mL of a 0.50 M H2SO4 solution
you need 3.00 mL of the 4.00 M sulfuric acid solution to make 12.0 mL of a 0.50 M solution.
What is Solution?Solution is a way to solve a problem or address an issue. It can involve finding an answer or coming up with a strategy to tackle a difficult situation. Solutions can be found through research, brainstorming, trial and error, or by using existing resources.
To solve this problem, we must use the equation:
V1C1 = V2C2
Where V1 is the volume of the concentrated solution, C1 is the concentration of the concentrated solution, V2 is the volume of the dilute solution, and C2 is the concentration of the dilute solution.
In this case, V1 is the volume of the 4.00 M solution that we need, C1 is 4.00 M, V2 is 12.0 mL, and C2 is 0.50 M.
Plugging these values into the equation, we can solve for V1:
V1 = (V2C2) / C1
V1 = (12.0 mL)(0.50 M) / (4.00 M)
V1 = 3.00 mL
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What is a neutral atom and has 14 protons?
A neutral atom and has 14 protons is Silicon
Each of the elements in the Periodic Table has an individual atomic number, or a specific number of protons in its nucleus.
The total number of protons that make up an atom's nucleus is represented by the atomic number of that atom, as is well known. We know that an atom has proton of 14, so the atomic number of that neutral atom is 14. we can check on the periodic table an atom that have 14 atomic number is silicon.
Therefore, the neutral atom and has 14 protons is Silicon
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A student heated 30 milliliters of water from 0 degrees celcius to 70 degrees celcius. How much energy did she use to heat the water?
The amount of energy used to heat the water from 0°C to 70°C is 8,786.4J.
How to calculate energy?The amount of energy used in heating a substance can be calculated using the following formula:
Q = mc∆T
Where;
Q = amount of heat absorbed or releasedm = mass of substance in gramsc = specific heat of water at 4.184 J/g°C∆T = change in temperatureAccording to this question, a student heated 30 milliliters of water from 0 degrees celsius to 70 degrees celsius.
Since 1mL of pure water equals 1 gram, then 30mL of water will equal 30grams of water.
Q = 30 × 4.184 × (70 - 0)
Q = 8,786.4J
Therefore, 8,786.4J is the energy used to heat the water sample.
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What is the volume of water in the graduated cylinder?
When using IR spectroscopy, what is being recorded by the machine?
Sizes
O Wavelengths
O Color
O Molecular mass
Answer:
wavelengths
Explanation:
hope it helps
thanks
Wavelengths are being recorded by the machine by using IR spectrography. Therefore, option B is correct.
Infrared (IR) spectroscopy is also known as infrared spectrometry. It is a technique that is used to analyze and identify chemical compounds based on their absorption or emission of infrared radiation.
Infrared radiation lies in the electromagnetic spectrum between visible light and microwave radiation. It has longer wavelengths and lower frequencies than visible light. When infrared radiation passes through a sample, certain chemical bonds in the sample absorb specific frequencies of infrared light.
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Why does the arrangement of the particles affect the properties of the substance?
The arrangement of the particles in a substance affects its properties because the arrangement of the particles determines the interactions between the particles.
The arrangement of the particles affects the properties of a substance because the interactions between the particles determine the overall characteristics of the substance.
For example, if the particles in a substance are arranged in an orderly, crystalline structure, the inter-particle forces are strong, making the material harder and more rigid. On the other hand, if the particles are arranged in a disordered, amorphous structure, the inter-particle forces are weaker, making the material softer and more malleable.
The arrangement of the particles also affects the physical and chemical properties of the substance. If the particles are arranged in a crystalline structure, the substance will have a higher melting point, boiling point, and hardness than if the particles were arranged in an amorphous structure.
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What happens to the reactivity of metals as you go from left to right a decreases C Doubles B increases D stays the same?
The reactivity of the metals as we go across in the period or from the left to the right horizontally in the periodic table it will decreases.
The reactivity of the metals as we move across the period from left to right in the periodic table it will decreases. the reactivity of the metals as we move in the group from top to the bottom in the periodic table it will increases due the increase in the size of the elements from top to bottom.
Thus, the reactivity of the metals decreases as we move across period from left to the right in the periodic table.
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Exercise 3.1 Evaporation
In this exercise, you will think about what evaporation is and how it happens.
1 Complete these sentences. Choose the correct word when there
is a choice.
Evaporation occurs when a
turn into a
The particles in the liquid
turns into a
gain/lose
and move faster/slower and closer
together/further apart until some of them escape from the surface and
become a
Evaporation occurs when a liquid turns into vapour . The particles in the liquid gain energy and move faster and further until some of them escape from the surface and become a vapour
What is Evaporation ?A type of vaporisation called evaporation takes place on the surface of a liquid as it transitions into the gas phase. When humidity impacts the rate of evaporation of water, for example, a high concentration of the evaporating substance in the surrounding gas considerably slows down evaporation.A liquid transforms into a gas during evaporation. It is simple to picture when puddles of rain "vanish" on a hot day or when wet clothing dries in the sun. In these instances, the liquid water is evaporating into a gas known as water vapour rather than really dissipating. Global evaporation takes place.Evaporation occurs on surfaces. The top layer of the liquid evaporates because the molecules with the highest kinetic energy escape into the air, causing it to become lighter.
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What mass of copper(II) sulfate would remain
after removing all the water from 55 g of
CuSO4 · 5 H2O?
Answer in units of g.
According to the concept of molar mass and stoichiometry, the mass of copper(II) sulfate that would remain after removing all the water from 55 g of CuSO₄ · 5 H₂O is 35.18 g.
What is molar mass?Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.
Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.
In copper(II) sulfate , 249.68 g of copper (II) sulfate has 90 g water, thus 55 g of copper (II) sulfate will have 55×90/249.68=19.82 g water, so mass of copper sulfate= 55-19.82=35.18 g copper(II) sulfate.
Thus,35.18 g copper(II) sulfate would remain after removing all the water from 55 g of CuSO₄ · 5 H₂O.
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Baed on thi information, which type of light i more likely to damage the material?
Based on the information, UV light is more likely to damage the material.
Which kind of light has the greatest chance of warming quartz?Due to the fact that the infrared light bounces off the quartz, which increases its energy, the quartz may become warm.
The colors of paper and fabric can deteriorate due to ultraviolet light from the sun. In the presence of ultraviolet light waves, the chemicals in colored dyes can degrade. Sunburns may also result from ultraviolet radiation.
Paper and other organic materials will deteriorate, bleach, and deteriorate due to ultraviolet radiation. All of these modifications may reduce readability, affect how well artwork is regarded for its aesthetic qualities, and restrict access to the information it contains.
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Definition of RMA in chemistry pls
Answer:
Molecule name: N--N-METHYL-N-PROP-2-YNYLAMINE
Formula: C13 H15 N
Molecular weight: 185.265 Da
RMA-3 (Rubidium Microporous Aluminosilicate-3) was hydrothermally synthesized from rubidium–aluminosilicate gels without using any organic or inorganic additives, and its structure determined by XRD Rietveld analysis was confirmed as a novel framework topology containing two 8-membered ring pore-openings with dimensions of 0.49 × 0.37 nm and 0.34 × 0.38 nm
Answer:
Hey there! Just wanted to let you know that the term RMA stands for "relative molecular mass" in chemistry. This is a measure of the size of a molecule, calculated by adding up the atomic weights of all the atoms in the molecule. For example, the relative molecular mass of water (H2O) is 18, because the atomic weight of hydrogen (H) is 1 and the atomic weight of oxygen (O) is 16. The relative molecular mass of a molecule is typically expressed in atomic mass units (amu) and can be useful for characterizing and comparing different substances, and predicting their physical and chemical properties.
A 25.0 mL sample of a saturated Ca(OH)2 solution is titrated with 0.028 M HCl, and the equivalence point is reached after 38.1 mL of titrant are dispensed. Based on this data, what is the concentration (M) of the hydroxide ion
The concentration of hydroxide ions in the solution is 0.0428 M.
Ions are what?A molecule or atom that has a net electrical charge is called an ion.
The balanced equation for the reaction between HCl and Ca(OH)2 is:
Ca(OH)2 + 2HCl -> CaCl2 + 2H2O
The number of moles of HCl added at the equivalence point can be found by multiplying the volume of HCl added (in liters) by its concentration in moles/liter:
moles HCl = (38.1 mL HCl x 0.028 mol/L HCl) / 1000 mL/L = 0.00107 mol HCl
The concentration of hydroxide ions can be found by dividing the number of moles of hydroxide ions by the volume of the solution:
[OH-] = moles OH- / L of solution
We know that the number of moles of HCl added is equal to the number of moles of OH- present, so:
[OH-] = 0.00107 mol OH- / (25.0 mL / 1000 mL/L) = 0.0428 M
Therefore, the concentration of hydroxide ions in the solution is 0.0428 M.
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QUIZ 4: GOLDEN YEARS TO IONIZATION The elements with the highest ionization energy and thus the most unreactive are:
The elements with the highest ionization energy are the noble gases, which are located in the upper right corner of the periodic table. These elements include helium, neon, argon, krypton, xenon, and radon. These elements have a full valence electron shell, meaning that they have the maximum number of electrons possible in their outermost energy level. This makes them very stable and resistant to chemical reactions, as they do not have any electrons that can be easily removed or added.
As a result, they have very high ionization energy, meaning that a large amount of energy is required to remove an electron and form an ion. Due to these properties, these elements are not readily reactive with other elements and tend to exist as diatomic molecules or as individual atoms. These elements are used in a variety of industrial, medical, and everyday applications such as in lighting, refrigeration, and as inert gases in medical equipment and in the manufacturing of semiconductors.
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A student standardized a solution of NaOH and found that the concentration was 0.542 M. They then used it to titrate a monoprotic acid. If 50.40 mL of the base was used, how many moles of acid were neutralized? (Do not report your answer in scientific notation)
Answer:
0.0272 moles
Explanation:
The number of moles of acid that were neutralized can be found by multiplying the volume of the base (in liters) by its concentration (in moles/liter) and then multiplying that value by the stoichiometric coefficient of the acid in the balanced chemical equation for the neutralization reaction.
To begin, we need to convert the volume of the base from milliliters to liters.
50.40 mL = 0.0504 L
Next, we can multiply the volume of the base (in liters) by its concentration (in moles/liter) to find the number of moles of base used in the titration.
0.0504 L * 0.542 M = 0.0272 moles
Since this is a neutralization reaction between a monoprotic acid and a strong base, the acid:base ratio is 1:1.
So the acid that has been neutralized is also 0.0272 moles.
At rest, a person inhales 2.31 x 1023 nitrogen molecules in an average breath of air. How many moles of nitrogen atoms are inhaled
0.384 moles of nitrogen atoms are inhales by the person in an average breath of air.
Avogadro constant is the number of molecules present in 1 mole of gas or a chemical compound. It is used to specify the atomic mass of a certain number of molecules in a substance or chemical compound or gas, in grams. Theses molecules may be atoms, neutron, proton, electron, etc. One mole of a substance contains 6.023 × 10²³ Molecules. In other words the atomic mass of a substance is the weight of 6.023 × 10²³ molecules.
So 2.31 × 10²³ atoms of nitrogen = (2.31 × 10²³)/(6.023 × 10²³)
= 0.384 moles
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Use atomic masses to demonstrate that the balance equation for the formation of iron(III) chloride obeys the law of conservation of mass. Fe + Cl2 → FeCl3
Using the law of the conservation of mass, the reactions can be shown to obey the law.
What is the law of conservation of mass?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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Determine the pHpH at the equivalence point for the titration of a 40.0 mLmL sample of 0.100 MHNO2MHNO2 by 0.200 MKOHMKOH . (The pKapKa of nitrous acid is 3.34.)
The equivalent point's pH is 3.60.
A numerical measure of how acidic or basic aqueous or other liquid solutions are is called pH, and The expression, which is widely used in chemistry, biology, and agronomy, translates the hydrogen ion concentration, which normally ranges between 1 and gram-equivalents per liter, into values between 0 and 14. Since pure water has a pH of 7, or gram-equivalents per liter of hydrogen ions, it is neutral (neither acidic nor alkaline). An alkaline or basic solution has a pH over 7, whereas one with a pH below 7 is described as acidic.
HNO2 = 0.100M
KOH= 0.200M
pKa = 3.34
using a formula
pH = pKa + log (salt/acid)
= 3.34 + log (0.200/0.100)
= 3.34 + log 2
= 3.34 + 0.30
= 3.60
The equivalent point's pH is 3.60.
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