Answer: Magnesium and Aluminum Mg & Al
Explanation:Magnesium's atomic mass is 24.31 and Aluminum's atomic mass is 26.98.
The symbol for every chemical element in this category is Mg & Al which is for Magnesium and Aluminum. Magnesium's atomic mass is 24.31 and Aluminum's atomic mass is 26.98.
What is an element symbol?
In chemistry, the symbol of an element symbol is usually used to refer to the element's name in a simple and easy-to-remember manner. It is a one or two-letter abbreviation used for the name of a chemical element. Though this term is also applied to alchemical symbols.
When an element’s symbol is represented by of two letters, the first letter is always capitalized and the second letter is written in lowercase.
The symbols of elements can also refer to the alchemy symbols used for the elements. Sometimes they even refer to the symbols used for the description of their isotopes.
Therefore, in this case, the symbol for every chemical element in this category is Mg and Al which is for Magnesium and Aluminum. Magnesium's atomic mass is 24.31 and Aluminum's atomic mass is 26.98.
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-brass cap
-bitumen (pitch)
-carbon and manganese oxide
-carbon rod
-ammonium chloride
-zinc case
Classify all of the substances named as an element, compound or a mixture
Element
=
Compound
=
Mixture
=
Answer:
Element:
Zinc case
Carbon rod
Compound:
Bitumen
ammonium chloride
Mixture:
Brass cap
carbon and manganese oxide
Explanation:
Elements are considered as pure substances that are made up of only one atom. A zinc case is made up of the metal zinc, which has a negative electrical polarity, that works as the anode in a battery. The carbon rod is also a component you can find in a battery that serves as the cathode.
Compounds are pure substances as well that are made up of two or more atoms chemically bonded. They cannot be separated through physical means. Examples would be bitumen (pitch) which is a hydrocarbon. Ammonium chloride, is an inorganic compound. It is a salt that can be used as a diuretic.
Mixtures are made up of two or more substances or solutions. They are not chemically bonded, so that means that there are physical ways to separate them. A brass cap is a mixture of different metals, specifically zinc and copper.
Carbon and manganese is a powdered mixture that can be found inside a battery or a dry cell as well. When the battery is powered up, this mixture is then converted into a compound called manganese dioxide.
Large crystals are formed when _____. igneous rocks cool very quickly metamorphic rocks change into igneous rock sedimentary rock is eroded igneous rocks cool very slowly
Large crystals are formed when igneous rocks cool very slowly.
Answer:
igneous rocks cool very slowly
Explanation:
Hope this helps√
I kind of get how to do this but don’t fully #’s 2, 3, and 4
Answer:2. 109 g NaCl
3. 31.9 g ZnCl2
4. 15.4 g Al2O3
Explanation: First find moles of the given compound
Next do the mole ratio between both compounds
Convert moles to mass.
Formula weight of ammonium sulfate is ______ amu
Answer:
132
Explanation:
Answer:
132
Explanation:
Select the true characteristics of respiration.
produces ATP
plants lose weight
is dependent on light
produces ethyl alcohol
occurs around the clock
takes place in the chloroplasts
responds to changes in temperature
takes in carbon dioxide, puts out oxygen
Answer:
takes in carbon dioxide, puts out oxygen.
Explanation:
The true characteristics of respiration are that it produces ATP, occurs constantly, and responds to temperature changes. Respiration does not happen in chloroplasts, depend on light, or involve taking in carbon dioxide and releasing oxygen.
Explanation:The true characteristics of respiration include: produces ATP, occurs around the clock, and responds to changes in temperature. Respiration is a biochemical process where cells break down glucose and other molecules to produce ATP (adenosine triphosphate), which provides energy for various cell processes. It happens continuously, regardless of whether it's day or night, hence it 'occurs around the clock'. Although it doesn't directly depend on external temperature, respiration rates can vary with temperature changes because enzymes involved in this process are sensitive to temperature.
However, it is not true that respiration 'takes place in the chloroplasts' or that it 'is dependent on light'. These characteristics are related to photosynthesis, not respiration. Additionally, respiration 'takes in oxygen and puts out carbon dioxide', not the other way round.
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This feature on Earth forms underground. This one seen here was formed from water flowing through layers of limestone rock underground. What is this feature called? A) cavern B) canyon C) pothole D) underground spring
What is the chemical equation from table salt made from baking soda
NaHCO₃ + HCl → NaCl + H₂O + CO₂
Explanation:
NaHCO₃ + HCl → NaCl + H₂O + CO₂
When Sodium bi carbonate (NaHCO₃) reacts with hydrochloric acid (HCl), it forms table salt (NaCl), water ( H₂O ) and Carbon di oxide (CO₂) gas is evolved.
Here base reacts with acid to form salt and it is the neutralization reaction.
Classify each property as physical or chemical.
Answer:
Physical changePhysical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.[1]
Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances. In general a physical change is reversible using physical means. For example, salt dissolved in water can be recovered by allowing the water to evaporate.
A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.
An example of a physical change is the process of tempering steel to form a knife blade. A steel blank is repeatedly heated and hammered which changes the hardness of the steel, its flexibility and its ability to maintain a sharp edge.
Many physical changes also involve the rearrangement of atoms most noticeably in the formation of crystals. Many chemical changes are irreversible, and many physical changes are reversible, but reversibility is not a certain criterion for classification. Although chemical changes may be recognized by an indication such as odor, color change, or production of a gas, every one of these indicators can result from physical change.
Chemical changeChemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.
I hope it will help youplz mark me as brainliestplz thank my answerPhysical properties are characteristics of matter that can be observed or measured without changing the substance's chemical composition. Chemical properties, describe how a substance interacts with other substances, indicating its ability to undergo chemical reactions.
Physical properties are those that can be observed or measured without altering the chemical identity of a substance. These include characteristics such as color, density, melting point, boiling point, odor, and conductivity. For example, when you melt ice to form water, it remains H2O throughout the process, so the change in state (from solid to liquid) is a physical change. Similarly, the change in color of a metal when it's heated is also a physical property, as it doesn't alter the metal's composition.
Chemical properties, on the other hand, describe how a substance interacts with other substances and its ability to undergo chemical reactions. These properties include reactivity, flammability, toxicity, and the ability to rust or corrode. For instance, when iron rusts upon exposure to oxygen and moisture, it's undergoing a chemical change because its composition changes from pure iron (Fe) to iron oxide (Fe2O3).
In summary, physical properties involve observable characteristics that don't change a substance's composition, while chemical properties describe a substance's behavior in chemical reactions and how it can transform into different substances.
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Which has the higher percentage of aluminum, Al2O, or Al(NO3)3
Answer: Al20
Explanation:
Al2O3, or aluminum oxide, has a higher percentage of aluminum content (~52.9%) than Al(NO3)3, aluminum nitrate (~12.7%). This is due to Al2O3 containing two aluminum atoms in its formula, whereas Al(NO3)3 contains only one.
Explanation:To determine which compound has a higher percentage of aluminum, we need to compare the aluminum content in Al2O3 and Al(NO3)3.
In Al2O3, also known as aluminum oxide, there are two aluminum atoms and three oxygen atoms. The molar mass of Al2O3 can be calculated by adding the atomic masses of 2 aluminum atoms (2x27 g/mol) and 3 oxygen atoms (3x16 g/mol), which amounts to 102 g/mol. The mass of aluminum in the compound is 54 g/mol (2x27 g/mol), resulting in an approximate aluminum content of 52.9% by mass for Al2O3.
For Al(NO3)3, aluminum nitrate, it contains one aluminum atom and three nitrate groups. The molar mass of Al(NO3)3 is comprised of the mass of one aluminum atom (27 g/mol) plus the mass of three nitrate ions (3x(14+3x16) g/mol), which sums up to 213 g/mol. Here, the aluminum's mass percentage is about 12.7%.
Comparing these percentages, Al2O3 has a higher percentage of aluminum than Al(NO3)3.
When humans burn fuel or
cut down trees, they (increase/decrease)
levels of carbon dioxide in the atmosphere.
Answer:
when humans burn fuel or cut down trees , the increase level of carbon dioxide in the atmosphere
Which of the following cells is formed by meiosis?
A.a bacterial cell
B. A egg cell
C. A stem cell
D a brain cell
Answer:
it could be a B. egg cell or C. A stem cell but im pretty sure the answer is egg cell
hopes it helps!
The cell which is formed by the process of Meiosis is called as an egg cell. The correct option is B.
What is Meiosis?Meiosis is a type of cell division that produces four daughter cells, each with half the number of chromosomes as the original cell. This process is essential for sexual reproduction, where haploid gametes, such as egg and sperm cells, are produced. Meiosis is called as reductional division type of cell division.
Through the process of Meiosis, four daughter cells are formed which are not exactly same or identical to the parent cell.
Bacterial cells do not undergo meiosis as they reproduce asexually through binary fission. Stem cells and brain cells are also not formed by meiosis but by mitosis, a type of cell division that produces identical daughter cells with the same number of chromosomes as the original cell.
Therefore, the correct option is B.
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how does freezing affect the volume of water?
Answer:When frozen, water molecules take a more defined shape and arrange themselves in six-sided crystalline structures. The crystalline arrangement is less dense than that of the molecules in liquid form which makes the ice less dense than the liquid water. When water freezes, the volume expands by approximately 9%.
Explanation:
PLZ HELP ME
In two or more complete sentences explain how to balance the chemical equation,
Ca + N2 ⟶ Ca3 + N2 and include all steps.
The balanced reaction is 3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s ).
Explanation:
A chemical equation is said to be balanced when the total number of atoms present on the reactants side is equal to the total number of atoms present on the product side.
The unbalanced chemical equation is as follows,
Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )
To balance this equation, you need to look at how many atoms of each element are present on each side of the chemical equation.
Calcium has 1 atom on the reactant and 3 on the products side. To balance the reaction we need to multiply the calcium atom by 3 on the reactants side.
3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )
Now Nitrogen has a coefficient of 2 on both sides of the reaction. Hence the balanced chemical equation will thus be
3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )
how many moles of aluminum atoms are in one aluminum can
Using the equation below, calculate the number of grams of CO that can react completely with 78.9 g Fe2O3
Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)
Answer:
41.51 g of CO
Explanation:
The balance chemical equation for given double displacement reaction is,
Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂
Step 1: Calculate moles of Fe₂O₃:
Moles = Mass / M.Mass
Moles = 78.9 g / 159.68 g/mol
Moles = 0.494 moles
Step 2: Calculate moles of CO:
According to equation,
1 mole of Fe₂O₃ reacted with = 3 moles of CO
so,
0.494 moles of Fe₂O₃ will react with = X moles of CO
Solving for X,
X = 0.494 mol × 3 mol ÷ 1 mol
X = 1.482 moles of CO
Step 3: Calculate Mass of CO as:
Mass = Moles × M.Mass
Mass = 1.482 mol × 28.01 g/mol
Mass = 41.51 g of CO
What is the contrast of these two atoms?
Answer:
The atomic number of silicon is 14 while atomic mass of carbon is 14.
Explanation:
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
In given atoms ¹⁴₆C and ²⁸₁₄Si the atomic mass of carbon is 14 while the atomic number of silicon is 14. It means silicon has 14 electrons or protons while carbon has 6 protons or electrons because its atomic number is 6. Carbon has 6 protons and 8 neutrons in its nucleus while silicon has 14 protons and 14 neutrons in its nucleus.
In C:
Number of neutrons + protons = 8 + 6 = 14 amu (mass number)
Number of electrons = 6
In Si:
Number of neutrons + protons = 14 + 14 = 28 amu (mass number)
Number of electrons = 14
Help me please!!!!!!!!
Answer:
that's a hard one
Explanation:
Answer:Zn + 2 HCl => ZnCl2 + H2
Explanation: Zinc has 1 atom in the reactant and product side
2 atoms for H on both sides and 2 atoms of chlorine in the reactant and product side.
Circle the term or phrase in parentheses that makes each statement true.
• 1. A substance that produces hydrogen ions in solution is (an acid, a base).
Is it an acid or a base
Answer:
A substance that produces hydrogen ions in solution is AN ACID.
Explanation:
A sample of 22K gold contains the following: 22 g gold, 1.0 g silver, and 1.0 g copper. What is the percent gold in the sample? Group of answer choices
Answer:
35 percent
Explanation:
Answer:92%
Explanation:
What is the correct answer?
Answer:
Bleach and seawater are identified wrong.
Explanation:
Acids have an pH that is lower than 7 and bases have a pH of higher than 7 and (pH 7 is neutral)
We can observe from the table that bleach has a pH of 13 which is higher than 7 and shows basic characteristics
As for seawater the table shows it has a pH of 8 which is also a base. Therefore the answer is 3rd option "Bleach and seawater should be identified as bases".
Demonstrate In A Brief Paragraph How The Search To Explain Planetary Orbits Exemplifies The Scientific Method
People firstly believe that the planets move in a circular orbit until Newton came up with his hypothesis by inventing calculus so that we could understood and calculated planetary orbits and their accuracy.
Explanation:
Everyone assumed the planets were perfect circles until Newton came up with an idea. Slowly people would make maps of the orbits that added circles on circles, and they could never really explain about the movement of the planet. They simply say that planets move on circles but they lacked the math to explain or prove it. Then Newton came up with an idea of inventing calculus so that we could understood and calculated planetary orbits and their accuracy. Firstly people used their observations and say that the orbits looked like circles, then they developed their models and did the math, and proposed their hypothesizes which were wrong, until Newton came along and tried to match a model that used elliptical orbits and invented the math that allowed him to make predictions with it. His model worked for most planets. However he could not explain about the planet Mercury for instance since it was a very strange orbit. Then after the Einstein's theory of General Relativity he could also explain very deeply about it.Scientists and Astronomers made hypothesizes that there was another planet orbiting too close to the sun to see with telescopes, called Vulcan, that explained mercury's orbit before Einstein's theory. Then long after we had telescopes which was good enough to see if there was a planet orbiting closer to the sun than mercury.Answer:
Everyone assumed the planets were perfect circles until Newton came up with an idea. Slowly people would make maps of the orbits that added circles on circles, and they could never really explain about the movement of the planet. They simply say that planets move on circles but they lacked the math to explain or prove it. Then Newton came up with an idea of inventing calculus so that we could understood and calculated planetary orbits and their accuracy.
Firstly people used their observations and say that the orbits looked like circles, then they developed their models and did the math, and proposed their hypothesizes which were wrong, until Newton came along and tried to match a model that used elliptical orbits and invented the math that allowed him to make predictions with it. His model worked for most planets.
However he could not explain about the planet Mercury for instance since it was a very strange orbit. Then after the Einstein's theory of General Relativity he could also explain very deeply about it.
Scientists and Astronomers made hypothesizes that there was another planet orbiting too close to the sun to see with telescopes, called Vulcan, that explained mercury's orbit before Einstein's theory. Then long after we had telescopes which was good enough to see if there was a planet orbiting closer to the sun than mercury.
HELP!! THIS IS DUE IN AN HOUR !
Answer:
1 is the the earth and 2 is all of the above
Explanation:
Answer:
The answer is for 1. Earth. 2. Burrows
These imprints give scientists clues as to how these animals lived.
Explanation:
Condensation
Which part of the diagram shows this interaction?
hydrosphere - atmosphere
O evaporation
Precipitation
Snow
Rain
groundwater
precipitation
surface runoff
Evaporation
Surface runoff
Groundwater
Answer:
A
Explanation:
Answer:
Evaporation
Explanation:
I just took the quiz
Percentage Yield
The idea here is to determine how much product should be formed, given the amount of limiting
reactant and the balanced equation. Then you run the reaction and weigh how much was really
formed Divide the real by the ideal, multiply by 100, and you have the % yield.
So let's suppose you are making calcium oxide by decomposing calcium carbonate:
You have 20.0 g of Caco. You decompose it by heat, and weigh the calcium oxide that
remains. You have 10.3 grams. What is the % yield?
A) always write a balanced equation first:
B) then look at the mole relationship of reactant and product
C) then calculate the number of grams of product (Cao) you should get.
D) divide real by predicted amount and multiply by 100. Make sure it makes sense.
Sample problem: A student makes sodium chloride by buming 2.3 grams of sodium in chlorine
gas. If the yield is 90%, how much sodium chloride is made?
Problem 2: For the chemical reaction Mg(s) + 2 HCl(aq) - H, (9) + MgC1, (aq), calculate the
% vield if 100. Grams of magnesium react with excess HCl to produce 310 grams of MgCl,
Q.No. 1:
You have 20.0 g of CaCO₃. You decompose it by heat, and weigh the calcium oxide that remains. You have 10.3 grams. What is the % yield?
Answer:
%age Yield = 92.37 %
Solution:
The balance chemical equation for given decomposition reaction is;
CaCO₃ → CaO + CO₂
Step 1: Calculate Moles of CaCO₃:
Moles = Mass / M.Mass
Moles = 20.0 g / 100.08 g/mol
Moles = 0.199 moles of CaCO₃
Step 2: Calculate theoretical amount of CaO produced;
According to equation,
1 moles of CaCO₃ produced = 1 mole of CaO
So,
0.199 moles of CaCO₃ will produce = X moles of CaO
Solving for X,
X = 0.199 mol × 1 mol / 1 mol
X = 0.199 mol of CaO
Also,
Mass = Moles × M.Mass
Mass = 0.199 mol × 56.07 g/mol
Mass = 11.15 g of CaO
Step 3: Calculate %age Yield as;
%age Yield = Actual Yield / Theoretical Yield × 100
%age Yield = 10.3 g / 11.15 g × 100
%age Yield = 92.37 %
___________________________________________
Q.No. 2:
A student makes sodium chloride by buming 2.3 grams of sodium in chlorine gas. If the yield is 90%, how much sodium chloride is made?
Answer:
Actual Yield = 5.785 g of NaCl
Solution:
The balance chemical equation for given decomposition reaction is;
2 Na + Cl₂ → 2 NaCl
Step 1: Calculate Moles of Na:
Moles = Mass / M.Mass
Moles = 2.3 g / 23 g/mol
Moles = 0.10 moles of Na
Step 2: Calculate theoretical amount of NaCl produced;
According to equation,
2 moles of Na produced = 2 moles of NaCl
So,
0.10 moles of Na will produce = X moles of NaCl
Solving for X,
X = 0.10 mol × 2 mol / 2 mol
X = 0.10 mol of NaCl
Also,
Mass = Moles × M.Mass
Mass = 0.10 mol × 58.44 g/mol
Mass = 5.844 g of NaCl
Step 3: Calculate Actual Yield as;
%age Yield = Actual Yield / Theoretical Yield × 100
Or,
Actual Yield = %age Yield × Theoretical Yield ÷ 100
Actual Yield = 99 × 5.844 g ÷ 100
Actual Yield = 5.785 g of NaCl
___________________________________________
Q.No. 3:
For the chemical reaction Mg(s) + 2 HCl (aq) → H₂ (g) + MgCl₂ (aq) calculate the % yield if 100 grams of magnesium react with excess HCl to produce 310 grams of MgCl₂.
Answer:
%age Yield = 79.13 %
Solution:
The balance chemical equation for given decomposition reaction is;
Mg + 2 HCl → MgCl₂ + H₂
Step 1: Calculate Moles of Mg:
Moles = Mass / M.Mass
Moles = 100 g / 24.30 g/mol
Moles = 4.11 moles of Mg
Step 2: Calculate theoretical amount of MgCl₂ produced;
According to equation,
1 mole of Mg produced = 1 mole of MgCl₂
So,
4.11 moles of Mg will produce = X moles of MgCl₂
Solving for X,
X = 4.11 mol × 1 mol / 1 mol
X = 4.11 mol of MgCl₂
Also,
Mass = Moles × M.Mass
Mass = 4.11 mol × 95.21 g/mol
Mass = 391.73 g of MgCl₂
Step 3: Calculate %age Yield as;
%age Yield = Actual Yield / Theoretical Yield × 100
%age Yield = 310.0 g / 391.73 g × 100
%age Yield = 79.13 %
if Gregory starts with 2.5 grams of CuO, how many grams of N2 can he theoretically form?
Answer:
0.2934 g of N₂
Explanation:
The balance chemical equation for given reaction is as follow;
2 NH₃ + 3 CuO → 3 Cu + N₂ + 3 H₂O
Step 1: Calculate Moles of CuO as;
Moles = Mass / M.Mass
Moles = 2.5 g / 79.54 g/mol
Moles = 0.0314 moles of CuO
Step 2: Find out moles of N₂ as;
According to equation,
3 moles of CuO produced = 1 mole of N₂
So,
0.0314 moles of CuO will produce = X moles of N₂
Solving for X,
X = 0.0314 mol × 1 mol / 3 mol
X = 0.0104 moles of N₂
Step 3: Calculate Mass of N₂ as;
Mass = Moles × M.Mass
Mass = 0.0104 mol × 28.01 g/mol
Mass = 0.2934 g of N₂
12. Penny can knit 4 rows of a sweater in 5
minutes. How many hours will it take her
to knit 300 rows?
Answer:
6.25 hours
Explanation:
From the question;
Penny can knit 4 rows in 5 minutesWe need to determine the time it will take for her to knit 300 rows
4 rows = 5 minutes
300 rows = ?
= (300 × 5 ) ÷ 4
= 375 minutes
But, 1 hour = 60 minutes
Therefore;
= 375 ÷ 60
= 6.25 hours
Thus, it will take penny 6.25 hours to knit 300 rows
It will take her 6.25 hours to knit 300 rows.
Given:
Penny can knit 4 rows in 5 minutes
4 rows = 5 minutes
To find:
Time for knitting 300 rows=?
Calculation for time:Time = (300 × 5 ) ÷ 4
Time = 375 minutes
As we know, 1 hour = 60 minutes
Thus,
Time= 375 ÷ 60
Time= 6.25 hours
So, it will take 6.25 hours to knit 300 rows.
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Question 5 (1 point)
Your television converts
energy into ___
____ and sound energy.
chemical, electrical
Olight, electrical
O
electrical, light
O heat, light
Answer:
(a bit of heat) and light
Explanation:
it has the resistance in it so it will give heat when surpassed by a high tension
What is the acronym that describes conditions
that promote bacterial growth?
Answer:
FAT TOM
Explanation:
FAT TOM is used in food industry which describe six suitable conditions that promote the growth of bacteria.
Acronym of FAT TOM is
Food , acidity , time. temperature , oxygen and moisture.
Food contains the nutrients and other favorable requirements which is required for bacterial growth and it causes the food spoilage and if taken by human can cause food poisoning.
The acronym FATTOM is often used to describe factors essential for bacterial growth. Understanding these conditions is important for protein production using bacteria. Protein folding is the process by which a protein assumes its functional three-dimensional structure.
The acronym that describes conditions that promote bacterial growth is not specified in the provided materials, but often FATTOM is used to describe the factors essential for bacterial growth, which stands for Food, Acidity, Temperature, Time, Oxygen, and Moisture. Bacterial growth is of interest in various fields, including those seeking to collect protein. Bacteria can be used to express proteins which are later harvested for research or pharmaceutical purposes.
Protein Folding
Protein folding is the process by which a protein structure assumes its functional shape or conformation. Proper folding is crucial for a protein to function correctly. Misfolded proteins can lead to diseases such as Alzheimer's and Parkinson's. Understanding the conditions for bacterial growth allows for optimizing protein expression and ensuring proper protein folding during production.
Conditions for Bacterial Growth
To culture bacteria and promote growth, enrichment culture media are often used, which favor the expansion of specific bacteria presenting in low numbers. Environmental conditions affecting bacterial growth include temperature, pH, oxygen levels, and other factors like osmotic and barometric pressure. Categories of bacteria, such as psychrophiles and thermophiles, have unique growth requirements that must be met to thrive.
How many grams of lithium chloride can be produced from 14.3 g of lithium chlorate when it decomposes into lithium chloride and oxygen gas?
6.7 grams of lithium chloride will be produced.
Explanation:Lithium chlorate is LiClO₃ and lithium chloride is LiCl. The reaction is,
2LiClO₃ = 2LiCl +3O₂.
So here, 2 moles of lithium chlorate produces 2 moles of lithium chloride.
Or, one molecule of lithium chlorate will produce one mole of lithium chloride.
Molecular weight of lithium chlorate =[tex]6.9 + 35.5 + 16\times3[/tex] = 90.4.
So, 14.3 grams of lithium chlorate has 0.16 moles of lithium chlorate.
Thereby, moles of lithium chloride produced is 0.16 moles.
Molecular weight of lithium chloride = [tex]6.9+35.5[/tex] = 42.4 grams.
So weight of lithium chloride produced = [tex]42.4 \times 0.16[/tex] = 6.7 grams.
Thus, weight of lithium chloride produced will be 6.7 grams.
What is the pH of a 0.1 M acid solution?
Answer:
Explanation:
If a strong acid HA = H= + A- 100%
pH = -log [H+] = - log 0.1= -(-1)=1
Answer:
The pH is 1. I got this question right on my assignment.