The ionic bond has a much higher quality than metallic bonds. As a result, more vitality is required to break the bonds between Al and O than between Al and Al. Pure aluminium ductility .
Pure aluminium is very ductile and has a high electrical conductivity. the difference between the atomic bond between those two are Pure aluminium is a metal with a metallic bond. It has a Face Centered Cubic crystal structure and can be moved to thin thwarts.Aluminium is also used in electrical connections and transmitters for high-pressure overhead transmission lines, as well as local wiring in electrical applications.
Alumina (Al2O3) Brittleness- In any case, its oxide Al2O3 (aluminium oxide, also known as alumina, corundum) has a trigonal structure, a melting point greater than 2000 °C, and it (Al2O3) is extremely refractive. Alumina blocks are used as heater linings in high-temperature applications.
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How many significant figures does this value have: 10,888,003.0?
Answer:
1
Explanation:
significant figures means
amount of numbers AFTER a decimal
Answer:
Explanation:
there's 9
Label the intermediate(s) and transition state(s) in the reaction mechanism
A. First intermediate formed
B. Second intermediate formed
C. First transition state formed
D. Second transition state formed
E. Third transition state formed
F. Product
The correct option is F. Product i.e., it is the intermediate(s) and transition state(s) in the reaction mechanism.
What is the reaction?One or more new substances are formed as a result of the rearrangement of the atoms or molecules of two or more substances that come into contact. Electrons of one material interact with those of another to produce chemical reactions.
What makes chemical reactions significant?We can learn about a substance's qualities by studying chemical reactions. We can learn about a substance's chemical characteristics by looking at how it interacts with other substances. These characteristics can be utilized to recognize an unidentified sample.
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which statement describes why energy is released in a nuclear fusion reaction based on mass-energy equivalence?
The correct statement is for nuclear fusion reaction: A)For large nuclei, the mass of the original nucleus is greater than the mass of the products.
What was the explanation for mass-energy equivalence?This statement is based on the mass-energy equivalence, which states that the mass and energy of a system are equivalent and can be converted into each other according to the famous equation E=mc². In nuclear fusion reactions, the total mass of the products is less than the total mass of the reactants. This difference in mass is converted into energy and released as radiation, in the form of heat, light and other forms of radiation. Therefore, in a nuclear fusion reaction, the binding energy of the lighter nuclei is less than the binding energy of the heavier nucleus and the mass of the original nucleus is greater than the mass of the products, that's why energy is released.
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Which statement describes why energy is released in a nuclear fusion reaction based on mass-energy equivalence?
A)For large nuclei, the mass of the original nucleus is greater than the mass of the products.
B)For large nuclei, the mass of the original nucleus is less than the mass of the products.
C)For small nuclei, the binding energy of the lighter nuclei is greater than the binding energy of the heavier nucleus.
D)For small nuclei, the binding energy of the lighter nuclei is less than the binding energy of the heavier nucleus.
A pond initially contains 1,000,000 gal of water and an unknown amount of an undesirable chemical. Water containing 0.01 g of this chemical per gallon flows into the pond at a rate of 300 gal/h. The mixture flows out at the same rate, so the amount of water in the pond remains constant.Assume that the chemical is uniformly distributed throughout the pond.
The calculation to be used to determine if the chemical is evenly dispersed over the pond is dQ/dt=3-(3/10000Q).
Why do we use the term "chemical"?
Any material with a known composition is a chemical. To put it another way, a chemical always consists of the same "substance." There are some substances in nature, like water. Other chemicals, including chlorine, are produced (used for bleaching fabrics or in swimming pools).
Which five chemicals are examples?
Flammable liquids include phenol, dmf, acetonitrile, hexane, pyridine, xylene, toluene, ethyl alcohol, tetrahydrofuran, and ethyl ether.
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You are given a 1.50-g mixture of sodium nitrate and sodium chloride. You dissolve this mixture into 100 mL of water and then add an excess of 0.500 M silver nitrate solution. You produce a white solid, which you then collect, dry, and measure. The white solid has a mass of 0.641 g. a. If you had an extremely magnified view of the solution (to the atomic-molecular level), list the species you would see (include charges, if any). b. Write the balanced net ionic equation for the reaction that produces the solid. Include phases and charges. c. Calculate the mass percent of sodium chloride in the original unknown mixture.
A. If you had an extremely magnified view of the solution (to the atomic-molecular level), the species you would see would include sodium ions (Na+), nitrate ions (NO3-), chloride ions (Cl-), and silver ions (Ag+).
What is atomic-molecular?Atomic-molecular level refers to the scale at which the behavior of atoms and molecules can be studied and understood. At this level, the structure and properties of materials can be explained in terms of the interactions between atoms and molecules.
b. The balanced net ionic equation for the reaction that produces the solid is as follows:
Na+ + Cl- + Ag+ → AgCl(s) + Na+
c. To calculate the mass percent of sodium chloride in the original unknown mixture, we need to determine the mass of sodium chloride in the mixture. Since the original mixture had 1.50 g of sodium nitrate and sodium chloride combined, we can subtract the mass of sodium nitrate from this to find the mass of sodium chloride:
Mass of sodium chloride = 1.50 g - 0.859 g = 0.641 g
To calculate the mass percent of sodium chloride, we can divide the mass of sodium chloride by the total mass of the mixture and multiply by 100:
Mass percent of sodium chloride = (0.641 g / 1.50 g) × 100 = 42.7%.
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Your Task: Discuss how matter changes when thermal energy increases and decreases.
Please share your thoughts on thermal energy along the following discussion points:
Definition: Briefly define thermal energy. Use an example, if possible.
Increase. What happens when thermal energy is increased in matter? Use an example, if possible.
Decrease. What happens when thermal energy is decreased in matter? Use an example, if possible. Upload your paragraph to the assignment drop box. Refer to the rubric below to see how you will be evaluated.
Read other students’ posts and respond to at least two of them. In your responses, consider the following:
Mention at least one point on the importance of thermal energy. (not more than 1-2 sentences)
Share one key learning from the student’s post. (not more than 1-2 sentences)
Increase in the temperature would cause matter to change from one state to another.
What are the states of matter?We know that there are three states of matter that we have and these are the solid, the liquid and the gas states of matter. We know that one of the feats that can be accomplished heat is the conversion of matter from one state to another.
This is because, the addition of heat would supply energy to the molecules that compose matter and they would be able to move faster and thus break the bonds and convert from one state to the other.
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Complete and balance each of the following equations. If no reaction occurs, write NOREACTION. Express your answer as a chemical equation. Identify all of the phases in your answer.
1) KCl (aq) + CaS (aq) -->
2) CrBr2 (aq) + Na2CO2 (aq) -->
3) NaOH (aq) + FeCl3 (aq) -->
4) NaCl (aq) + Hg2(C2H3O2)2 (aq) -->
5) (NH4)2SO4 (aq) + SrCl2 (aq) -->
6) NH4Cl (aq) + AgNO3 (aq) -->
The following equations. If no reaction occurs: 1) NOREACTION, 2) CrBr2 (aq) + Na2CO2 (aq) --> 2NaBr (aq) + Cr(CO3)2 (s), and given below:
What is reaction?Reaction is the process by which a material or substance undergoes a change due to the introduction of an external factor. It is an action or response to a stimulus, and can be either physical or chemical in nature. Chemical reactions involve changes in the composition of the substances involved, while physical reactions involve changes in the physical properties of the substances.
3) NaOH (aq) + FeCl3 (aq) --> NaCl (aq) + Fe(OH)3 (s)
4) NaCl (aq) + Hg2(C2H3O2)2 (aq) --> 2NaC2H3O2 (aq) + Hg2Cl2 (s)
5) (NH4)2SO4 (aq) + SrCl2 (aq) --> 2NH4Cl (aq) + SrSO4 (aq)
6) NH4Cl (aq) + AgNO3 (aq) --> AgCl (s) + NH4NO3 (aq)
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how does rank the compounds nh3, n2, c2h6, ncl3, h2 in terms of decreasing capillary action in a glass tube
The given compounds ranked based on the decreasing capillary action in a glass tube NH₃ < NCl₃ < C₂H₆ < N₂ < H₂.
How would you describe the capillary action?A meniscus will turn upward as a result of water adhesion to a vessel's walls, which exerts an upward force on the liquid at the liquid's edges. The surface tension maintains the surface's integrity. When the adhesion to the walls is greater than the cohesive forces between the liquid molecules, capillary action takes place.
The movement of liquids in constricted areas is known as capillary action. The force of molecular attraction between a liquid and the solid surfaces around it is to blame.
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0.50 moles of gas take up 10.5 L
of space under constant pressure
and temperature conditions.
What volume is required to hold
2.0 moles of the gas?
Consider this initial-rate data at a certain temperature for the reaction described by
2NO2(g) + O3 (g) ----> N2O5 (g) +O2 (g)
[NO2]0 (M) [O3]0 (M) Initial rate (M/s)
0.65 0.8 2.47 x 104
1.1 0.8 4.18 x 104
1.76 1.4 11.70 x 104
*(the second column values are 0.8, 0.8, and 1.4. they are running into the other column).
Determine the value and units of the rate constant.
Take into account these initial-rate measurements for the reaction given by K has a value of 6.6 s-1.
In eleventh-grade chemistry, what is a reaction?Chemical Response: Chemical reactions are the processes by which a substance or substances change chemically to create a new substance or substances with entirely new attributes. Products are completely distinct in nature and identity from reactants.
A physical reaction is what?A physical response is a reaction that modifies the physical characteristics of an item or material Determinants of physical attributes include things like volume, mass, and density. The definition of a physical reaction is a response in which molecules rearrange one another but do not undergo chemical change.
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Consider these observations of the starting rate for the reaction for which K gives a score of 6.6 s-1.
In eleventh-grade chemistry, what is a reaction?Chemical Reaction: Chemical reactions are now the mechanisms by which a material or substances undergo chemical modification to produce a new substance or compounds with wholly new properties. Products are wholly different from reactants in nature and identity.
A physical reaction is what?A physical response is a reaction that modifies the physical characteristics of an item or material Determinants of physical attributes include things like volume, mass, and density. A physical reaction is defined as an action in which ions rearrange one another without experiencing a chemical change.
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how many kilograms of chalcopyrite must be mined to obtain 465 g of pure cu ?how many kilograms of chalcopyrite must be mined to obtain 465 g of pure cu ?
Chalcopyrite must be mined to obtain 465 g of pure cu will be 1342.92g.
The chemical formula for Chalcopyrite will be CuFeS2 having a brassy to golden yellow color. It contains 34.5%Cu, 35.0% S and 30.5% Fe. Mineral is the principal source of a copper metal, as well as one of the major source of sulfur. Chalcopyrite will corresponds having a molecular mass of 183.54.
The distribution of a mass for this compound will be
Iron Fe 55.845 (1) 30.430%
Copper Cu 63.546 (1) 34.626%
Sulfur S 32.065 (2) 34.944%
Cu represents 34.626% of the total mass of a compound
To mine 425g of pure copper, requires a quantity of the Chalcopyrite which is equal to
\frac{465g}{0.34626} =1342.92g }{}
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1.a student mixes baking soda and vinegar in a glass. the results are a bubbly chemical reaction. do you think any new substances are being created in this mixture? if so, how do you know?
2.suppose this was done on top of a balance. do you think the mass would change as the reaction proceeded?
3.what do you think would happen to the mass if the reaction took place inside a sealed plastic bag?
The baking soda and vinegar are an acid-base reaction which is chemical. Because of this, a new substance is formed. The bubbles show that a gas is created (carbon dioxide
Baking soda and vinegar cause a chemical acid-base reaction. As a result, a new substance is formed. The bubbles indicate the formation of a gas (carbon dioxide). Bicarbonate of soda, also known as "baking soda," is a fantastic household item that can be used for so much more than baking! See some of the best baking soda uses, from removing stains to cleaning teeth to even getting rid of your sweet tooth. We always had baking soda on hand when I was a kid to leaven biscuits, dumplings, and various quick breads. Mom put an open box of it in the fridge to absorb odours, and she had us drink a bit of it mixed with water to settle upset stomachs.
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The tabulated data were collected for this reaction:
CH3Cl(g) + 3Cl2(g) → CCl4(g) + 3HCl(g)
[CH3Cl] (M) [Cl2] (M) Initial Rate (M/s)
0.050 0.050 0.014
0.100 0.050 0.029
0.100 0.100 0.041
0.200 0.200 0.115
The rate law is for this reaction is r= k [CH₃Cl][Cl₂]⁻⁰⁵ M s⁻¹
where the rate constant is k = 1.25 and the overall order of the reaction is 1.5.
An equation that connects the rate of a chemical reaction to the concentrations of the reactants is known as the rate law.
The reaction's rate law is as follows:
r = k [CH₃Cl]ᵃ [Cl₂]ᵇ
where,
r is the initial rate.
k is the rate constant.
a is the reaction order for CH₃Cl.
b is the reaction order for Cl₂.
If we write the ratio r₂/r₁, we get:
r₂/r₁ = k [CH₃Cl]₂ᵃ [Cl₂]₂ᵇ / k [CH₃Cl]₁ᵃ [Cl₂]₁ᵇ
r₂/r₁ = {[CH₃Cl]₂/ [CH₃Cl]₁}ᵃ
(0.029 M/s)/(0.014 M/s) = {0.100M/0.050 M}ᵃ
a ≈ 1
If we write the ratio r₃/r₂, we get:
r₃/r₂ = k [CH₃Cl]₃ᵃ [Cl₂]₃ᵇ / k [CH₃Cl]₂ᵃ [Cl₂]₂ᵇ
r₃/r₂ = {[Cl₂]₃/[Cl₂]₂}ᵇ
(0.041 M/s)/(0.029 M/s) = {0.100 M/0.050 M}ᵇ
b ≈ 0.5
So far, the rate law is:
r= k[CH₃Cl][Cl₂]⁰⁵
your question is incomplete but most probably your full question was
The tabulated data were collected for this reaction:
CH3Cl(g) + 3Cl2(g) → CCl4(g) + 3HCl(g)
[CH3Cl] (M) [Cl2] (M) Initial Rate (M/s)
0.050 0.050 0.014
0.100 0.050 0.029
0.100 0.100 0.041
0.200 0.200 0.115
(a) Write an expression for the reaction rate law and calculate the value of the rate constant, k.
(b) What is the overall order of the reaction?
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? Anyone know the answer
The amount of heat gained or lost by a sample (q) can be calculated using the equation q = mcΔT, where m is the mass of the sample, c is the specific heat, and ΔT is the temperature change.
In which process is heat not added?In adiabatic process, no transfer of heat takes place between system and surroundingAdiabatic process: When a thermodynamic system undergoes a change in such a way that no exchange of heat takes place between Systems and surroundings, the process is known as an adiabatic process.During an isobaric expansion process, heat enters the system. Part of the heat is used by the system to do work on the environment; the rest of the heat is used to increase the internal energy.:Yes, heat can be added to a body without causing the temperature of the body to rise as in the case of latent heat being added to cause a change of state of the body or isothermal process
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When zinc is heated redness in a current of steam,hydrogen gas is obtained.write an equation
when a Zn react with the steam ie, heated with a steam the product formed wiil be Zinc hydroxide and hydrogen gas.
Zn(OH)2 + H2
The formula for an ionic compound always indicates the _________ whole number ratio of the positive to negative ions within the crystal.
The formula for an ionic compound always indicates the smallest whole number ratio of positive to negative ions within the crystal.
Ionic compounds have ionic bonds that result from the transfer of electrons between a cation (positive ion) and an anion (negative ion). In most cases, metallic and non-metallic elements make up ionic compounds. The chemical is neutral by definition but contains positively and negatively charged ions known as anions and cations.
The ratio of cations which are the positively charged ions to anions which are the negatively charged ions in an ionic compound's formula must be the smallest possible whole number. For instance, the ionic compound sodium chloride (NaClformula )'s implies that there are two chloride ions for every one sodium ion (Na+) (Cl-). This is known as the empirical formula of the compound.
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what is the percent ionization of a 2m solution of acetic acid at 25˚c?
0,6 %
0,3 %
0,0036 %
0,0018 %
The percent ionization of a 2M solution of acetic acid at 25˚C is 0.0036%.
Acetic acid is a weak acid and it ionizes only partially in an aqueous solution, meaning not all of the acetic acid molecules will dissociate into ions. The percent ionization of a weak acid can be calculated using the formula:
[H3O+]/[HA] = Ka
Acetic acid Ka = 1.8 x [tex]10^{-5}[/tex] at 25°C
[H3O+] = Ka x [HA] = 1.8 x [tex]10^{-5}[/tex] x 2 = 0.000036
% ionization = ( [H3O+]/[HA]) x 100 = 0.0036%
It's worth noting that Percent ionization is a small number, typically less than 1% for weak acids.
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which of the following would occur if solid nh4cl was added to an aqueous solution of nh3?
The pH decreases.
The equilibrium constant changes.
The pH increases.
NH3 will ionize to a greater extent.
Adding solid nh4cl to an aqueous solution of nh3 lowers the pH.
NH4Cl is a salt. That is, when dissolved in water, it dissociates into its corresponding ions, namely NH4+ and Cl-. NH4+ wants to balance. Dissociates into H+ and NH3. However, the solvent contains more NH3, which promotes the reverse reaction. Therefore, NH4 remains and more NH4 is produced until equilibrium is reached. This raises the pH. In chemical reactions, chemical equilibrium is the concentration of both reactants and products that do not change over time and is the state of no observable change in system properties.
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in the beta oxidation pathway, when the starting fatty acid contains n carbons, what is the product of the enzyme acyl-coa synthetase? assume the starting saturated fatty acid contains n carbons and n is an even number.
In the beta oxidation pathway, the product of the enzyme acyl-coa synthetase when the starting fatty acid contains n carbons is, an acyl-CoA molecule.
What is Beta oxidation pathway?The word "β-oxidation" refers to an oxidation that occurs in the fatty acid's -carbon when two carbon atoms are removed from the carboxyl end of the molecule at a time. By means of a process known as beta oxidation, fatty acids with an even or odd number of carbon atoms as well as unsaturated fatty acids are oxidised.
The acyl-CoA molecule contains n-carbon fatty acid, which is covalently bound to Coenzyme A (CoA) through a thioester bond. The starting fatty acid is a saturated fatty acid containing n carbons, where n is an even number.
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if i have an unknown quantity of gas at a pressure of 1.2 atm, a volume of 31 liters, and a temperature of 87 0 c, how many moles of gas do i have?
The measurements for such question indicate that we possess 1.259 mol of gas.
Is 37 degrees Fahrenheit hot or cold?Your body temperature is usually around 37 °C. When his body is 37.8°C or greater, you typically have a fever. You might feel hot, cold, or shaky. You can tell if you have a fever by testing your temperature with a thermometer.
Pressure of gas = 1.2 atm
Volume of gas = 31 L
Temperature of gas = 87°C
Number of moles = ?
The generic gas equation will be used to address the given problem.
PV = nRT
P= Pressure
V = volume
n = number of moles
R is equal to 0.0821 atm.L/mol.K for general gases.
T = temperature in kelvin
Now we will convert the temperature.
87+273 = 360 K
by putting values,
1.2 atm × 31 L = n×0.0821 atm.L/ mol.K × 360 K
37.2 atm.L = n× 29.556 atm.L/ mol
n = 29.556 atm.L/mol / 37.2 atm.L
n = 1.259 mol
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each amino acid has a carboxyl group and an amino group. are these groups present in a polypeptide? explain.
Each amino acid also has a carboxyl (acid) as well as COOH group in addition to the amino or NH2 group. Peptide bonds hold amino acids, polypeptides, and proteins together.
An acid is what?Any component that tastes bad in aqueous system, turns red litmus paper red, releases hydrogen when it reacts with some metals, mixes with bases to form salts, and activates chemical reactions is referred to be an acids (acid catalysis).
What different kinds of acids exist?The two types of acids are organic materials and natural compounds. In comparison to acids and alkalis, organic acids are typically weaker. Although organic acids contain carbon, inorganic acids do not, and this is a crucial difference.
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when has glucose been broken down from its original 6 carbon molecule to 6 molecules of carbon dioxide?
After the second turn through the Krebs cycle the glucose molecule has been broken down completely from its original 6 carbon molecule to 6 molecules of carbon dioxide.
Krebs cycle starts when acetyl-CoA combines with a four-carbon molecule. That molecule is called OAA. This produces citric acid which has six carbon atoms. The Krebs cycle is also known as the citric acid cycle. After the formation of citric acid, it goes through a series of reactions and release energy. The energy is captured in molecules of NADH, ATP, and FADH2. Carbon dioxide releases as a waste product of the reactions. The final step of the Krebs cycle is the re-generation of OAA. This is the molecule that began the Krebs cycle. This molecule is needed for the next turn through the cycle. Two turns are needed for the complete process. It is because of the glycolysis produces two pyruvic acid molecules when it splits glucose.
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Determine the product of the following reaction.1. LiAIH42. H2O
The product of the reaction using LiAIH₄ 2.H₂O is attached below.
In simple terms, what is a chemical reaction?One or more substances, also referred to as reactants, are changed into one or more new substances, referred to as products, during a chemical reaction. Combustion is one of the five fundamental types of chemical reactions, along with combination, decomposition, single-replacement, and double-replacement.
Chemical reactions begin with reactants, and the products of a reaction are the substances that were produced. The common chemical formula can be used to represent a chemical reaction: Reaction products. During chemical reactions, bonds shatter and reform. Also, the opposite outcome of the reaction happens.
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The suggested mechanism for the reaction A + 2B + C D the suggested mechanism follows. A + B =X slow X + C → Y fast Y + B →D fast Derive the rate equation for the reaction from this mechanism. Enter the following orders as integers. (a) What is the order of the reaction with respect to A? (b) What is the order of the reaction with respect to B? (c) What is the order of the reaction with respect to C?
The orders of the reaction with respect to A, B, and C are (a) 1, (b) 2, and (c) 1, respectively.
What is reaction?Reaction is the process by which an organism responds to a stimulus, such as a chemical, physical, or environmental factor. Responses may be immediate or gradual, and can be positive or negative.
The rate equation for the reaction is given by:
Rate = k[A]x[B]y[C]z
where k is the rate constant, and x, y, and z are the orders of the reaction with respect to A, B, and C, respectively.
From the mechanism, we can see that the reaction is first order with respect to A, second order with respect to B, and first order with respect to C. Therefore, the orders of the reaction with respect to A, B, and C are (a) 1, (b) 2, and (c) 1, respectively.
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Using the average atomic masses for each of the following elements (see the table inside the cover of this book), calculate the mass (in amu) of each of the following samples.
a. 125 carbon atoms
b. 5 million potassium atoms
c. 1.04 × 10^22 lithium atoms
d. 1 atom of magnesium
e. 3.011 × 10^23 iodine atoms
The mass of the given samples is 150.125 amu, 1,955,000 amu, 7.28336 * 10^22 amu, 24.31 amu, and 3.826206 amu respectively
The mass of the given samples can be calculated in the following way
To calculate the mass of a sample, you need to multiply the number of atoms in the sample by the atomic mass of the element. The atomic masses of the elements are given in the table inside the cover of the book.
a. 125 carbon atoms:
The atomic mass of carbon = 12.01 amu
Mass of sample = 12.01 amu/atom * 125 atoms = 150.125 amu
b. 5 million potassium atoms:
The atomic mass of potassium = 39.10 amu
Mass of sample = 39.10 amu/atom * 5,000,000 atoms = 1,955,000 amu
c. 1.04 × 10^22 lithium atoms:
The atomic mass of lithium = 6.94 amu
Mass of sample = 6.94 amu/atom * 1.04 * 10^22 atoms = 7.28336 * 10^22 amu
d. 1 atom of magnesium:
The atomic mass of magnesium = 24.31 amu
Mass of sample = 24.31 amu/atom * 1 atom = 24.31 amu
e. 3.011 × 10^23 iodine atoms:
The atomic mass of iodine = 126.90 amu
Mass of sample = 126.90 amu/atom * 3.011 * 10^23 atoms = 3.826206 amu
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Is SbF3 polar or non polar?
Antimony trifluoride, SbF3, has a negligible solubility, hence its reactivity in non-polar aprotic solvent has not been investigated.
What kind of molecule is nonpolar?The non-polar molecules are those without charges at the end because their electrons are evenly distributed throughout and cancel one another out symmetrically. A polar and non-polar molecule cannot mix together in a solution.
Does water have polarity or not?The water molecule consists of two poles, one positive charge here on 'H' pole (side) and one negative charge here on 'O pole because of the uneven sharing of electrons here between atoms and the asymmetrical form of the molecule (side).
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what trend in ionization energy do you see as you go down a group/family on the periodic table? what causes this trend?
As you progress down a group, the first ionization energy normally drops. This is because the outermost electron is typically held less securely and can be removed with less energy because it is farther away from the nucleus.
As you descend a group family on the periodic table, what pattern do you notice?The electronegativity of a group diminishes from top to bottom. This is due to the fact that as atomic number decreases within a group, the atomic radius—the separation between the valence electrons and nucleus—increases.
As you move through the periodic table, what pattern do you notice in the ionization energy?First ionization energy normally rises from left to right across a period on the periodic table. This is because.
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Typically, the initial ionization energy decreases as you move along a group. This is because the outermost electron is typically held less securely and can be removed with less energy because it is farther away from the nucleus.
As you descend a group family on the periodic table, what pattern do you notice?A group's electronegativity decreases at top to bottom. This is because the atomic radius—the distance in between outer electrons and nucleus—increases as atomic number within a group decreases.
What pattern do you see in the ionization energy as you progress through the periodic table?On the periodic table, the first ionization energy typically climbs across a period from left to right.
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The drawings below represent aqueous solutions. Solution A is 2.00 L of a 2.00-M aqueous solution of copper(II) nitrate. Solution B is 2.00 L of a 3.00-M aqueous solution of potassium hydroxide. a. Draw a picture of the solution made by mixing solutions A and B together after the precipitation reaction takes place. Make sure this picture shows the correct relative volume compared to solutions A and B, and the correct relative number of ions, along with the correct relative amount of solid formed. b. Determine the concentrations (in M) of all ions left in solution (from part a) and the mass of solid formed.
The mass of the solid is 293 g. if A 2.00 L of 2.00-M aqueous solution of copper(II) nitrate. Solution B is 2.00 L of 3,00-M aqueous solution of potasSium hydroxide.
What can happen if your potassium level is too low?A low potassium level can make muscles feel weak, cramp, twitch, or even become paralyzed, and abnormal heart rhythms may develop. The diagnosis is based on blood tests to measure the potassium level. Usually, eating foods rich in potassium or taking potassium supplements by mouth is all that is needed.
Can low potassium be cured?Hypokalemia is treatable. Treatment usually involves treating the underlying condition. Most people learn to control their potassium levels through diet or supplements.
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the density of copper is 8.92 g/ml. calculate the mass of copper (in cg) that occupies a volume of 25 ml.
The density of copper is 8.92 g/ml. Mass = density x volume 8.92 gm/cm^3*25cm^3 = 223gm. volume = mass/density 454 gm / 8.92 gm/cm^3 = 50.89 cm^3.
Density is termed as the substance of a mass per unit volume. It is denoted by ρ. It is defined as mass will be divided by volume. D = m / v.
D = 8.92 gm / cm3, V = 25.0 cm3 and M = D X V
Therefore, M = 8.92 gm/cm3 x 25 cm3 = 223 gm
Therefore, V = 454 gm / 8.92 gm/cm3 = 50.9 cm3 (the gm cancel out)
--The given question is incomplete, the complete question is
"The density of copper is 8.92 g/cm cubed A. What is the mass of 25.0 cm cubed of copper B. What is the volume of 454 g of copper"--
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Liquid Measurements Water Isopropyl Alcohol Mass A Graduated Cylinder (9) 17.83 18.07 Volume (mL) 5 5 Mass B: Graduated Cylinder with Liquid (9) 23.54 23.9 Mass B-A Liquid (9) 5.71 5.83 Density (g/mL) 3.56 3.61 Percent Error (%)
the percent error for the density of the liquid in each graduated cylinder is -1.38% in A and 1.39% in B
To calculate the percent error for the density of the liquid in each graduated cylinder, we need to use the following formula:Error percent is calculated as [(experimental value - acceptable value) / accepted value]. x 100. First, we'll calculate the density of the liquid in graduated cylinder A: Density of liquid A = mass of liquid A / volume of liquid A = (23.54 - 17.83) g / 5 mL = 3.56 g/mLNow we'll calculate the percent error for density of liquid A: % Error = [(3.56 g/mL - 3.61 g/mL) / 3.61 g/mL] x 100 = -1.38%. Next, we'll calculate the density of liquid B: Density of liquid B = mass of liquid B / volume of liquid B = (23.9 - 18.07) g / 5 mL = 3.61 g/mL. Now we'll calculate the percent error for density of liquid B:% Error = [(3.61 g/mL - 3.56 g/mL) / 3.56 g/mL] x 100 = 1.39%. It's worth noting that the percent error for the density of liquid A and B are opposite in sign and similar in magnitude, this implies that the measurement errors in mass and volume are likely to be canceled out when measuring the density, resulting in relatively low error.
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