The amount of potassium bromide that should be added to water to prepare 0.50 L of solution with a molarity of 0.125 would be 7.44 grams.
Preparation of solutionsThe problem here is we don't know the exact amount, in grams of the solute, potassium bromide to dissolve in 0.50 L of water to make a solution with a molarity of 0.125 M.
Recall that the number of moles of solute present in a solution can be mathematically determined as:
Mole = molarity x volume
Thus, the number of moles of solute needed to prepare 0.50 L, 0.125 M solution would be:
0.125 x 0.50 = 0.0625 mol
This means that 0.0625 mol of potassium bromide is what we need. The equivalent mass of 0.0625 mol of potassium bromide would be:
Mass = mole x molar mass
The molar mass of potassium bromide is 119 g/mol.
Mass = 0.0625 x 119 = 7.44 grams
In other words, the amount of potassium bromide that should be added to water to prepare 0.50 L. o.125 M solution would be 7.44 grams.
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the amount of co2 production produced by the ocean and taken in by the ocean is close to 100% balanced. true or false
'The statement the amount of carbon dioxide production produced by the ocean and taken in by the ocean is close to 100% balanced is TRUE.
What is the relationship between photosynthetic rate and respiration rate?The relationship between photosynthetic rate and respiration rate is nearly equal in order to maintain homeostasis or internal equilibrium in the biosphere, which can be considered a whole ecosystem.
Therefore, with this data, we can see that the relationship between photosynthetic rate and respiration rate is given by a nearly similar amount of carbon dioxide production and consumption.
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Question 2 (1 point)How many electrons are located in the energy level with the lowest amount of energy
The first energy level can hold up to 2 electrons.
How many electrons are located in the energy level ?The first energy level can contain up to two electrons, the second can store up to eight electrons, the third can hold up to 18 electrons, and the fourth can hold up to 32 electrons. In contrast, radio waves have the lowest energy, longest wavelengths, and lowest frequencies of any kind of EM radiation. The portions of the electromagnetic spectrum are called from greatest to lowest energy: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
The bigger a shell is, the more electrons it can retain, and the higher the energies of those electrons, the further it is from the nucleus. The first shell (the one nearest to the nucleus) may accommodate two electrons.
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Give three importance of arthropods, mollusks, and echinoderms.
1.) Arthropods: Arthropods are important as
They play a key role in many ecosystems as pollinators, decomposers, and as a food source for other animals. They also have a wide range of diversity, with over 1 million known species, which makes them an important group for the study of evolution and ecology.2.) Mollusks: Mollusks are important for several reasons.
They play a key role in marine ecosystems as filter feeders and as a food source for other animals. They also have a wide range of diversity, with over 85,000 known species, which makes them an important group for the study of evolution and ecology. Additionally, they have been used by humans for food, medicine, and jewelry for thousands of years.3.) Echinoderms: Echinoderms are important for several reasons.
They play a key role in marine ecosystems as predators, scavengers, and as a food source for other animals. They also have a wide range of diversity, with over 7,000 known species, which makes them an important group for the study of evolution and ecology. They also have an unique regeneration abilities which makes them important for the study of regenerative medicine.Hope This Helps You!
if 3.25 g of n2h4 reacts with excess oxygen and produces 0.750 l of n2, at 295 k and 1.00 atm, what is the percent yield of the reaction?
At 295 K and 1.00 atm, a reaction involving 2.65 g of N2H4 and extra oxygen yields 0.75 of N2 and a percent yield of 29.76%.
Take into account the following balanced equation.
N2H4(aq) N2(g) O2(g) = N2(g) 2H2O (l)
Using the following conversion factors and 2.65 g of N2H4, we can get the theoretical volume of N2 obtained at STP.
N2H4 has a 32.05 g/mol molar mass.
N2H4 and N2 have a 1:1 molar ratio.
N2 takes up 22.4 L per mole at STP.
3.25g N2H4× (1mol N2H4/32.05)× (1mol N2H4/ 1mol N2H4)×(22.4 L N2/1mol N2
We have 2.33 L of N2 at 273.15 K, and by applying Charles' law, we can determine the volume at 295 K.
V1/T1=V2/T2
V2=V1×T2/T1
V2=V1×T2/T2
=2.33295/273.15
V2=2.52L
The following phrase can be used to get the percent yield.
%yield is experimental yield minus theoretical yield, therefore 100 = 0.75 minus 2.52 equals 29.76%.
The percent yield of the reaction is 29.76% when 3.25 g of N2H4 reacts with extra oxygen to create 0.75 l of N2 at 295 K and 1 atm.
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if an acid has a ka=1.6 x 10-10 what is the acidity of the solution
The information provided in the query is insufficient to calculate the solution's acidity. This is due to the fact that the equation pH = -log [H+] is the sole way to determine acidity.
What is the solution's acidity?A solution's acidity can be determined by looking at its pH, which is a measurement of hydrogen ion concentration. Pure water slightly separates into ions with roughly equal amounts of hydrogen & hydroxyl (OH) ions. [H+] is 107 for such a neutral solution, or pH = 7.
Consequently, how can something get basic or acidic?Whenever the hydroniums and hydroxyls are not in balance, that occurs. The substance is acidic if it contains more positive charge hydroniums than that of negatively charged hydroxyls.
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Many household cleaning products contain oxalic acid, H₂C₂O4 a diprotic acid with the following dissociation constants
Ka1 = 5.9 x 10^-2
Ka2 = -6.4 × 10^-5
calculate the equilibrium concentration of h3o^+ in a 0.20 m solution of oxalic acid.
The equilibrium concentration of H3O+ ina 0.2 m solution of oxalic acid is [H3O+] = 0.08.
When a chemical process reaches equilibrium, the equilibrium constant (often represented by the letter K) sheds light on the interaction between the reactants and products. For instance, the ratio of the concentration of the products to the concentration of the reactants, each raised to their respective stoichiometric coefficients, can be used to establish the equilibrium constant of concentration (denoted by Kc) of a chemical reaction at equilibrium. It is significant to remember that there are several kinds of equilibrium constants that establish relationships between the reactants and products of equilibrium reactions in terms of various units.
The proportion of the reactant to the product in a chemical reaction is known as the equilibrium constant.
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Shira is pushing a table toward Dominic with a force of 12 newtons (N). Dominic wants to stop the table from moving.
How much force will Dominic need to apply to stop the table from moving?
According to the Newton’s first law of motion, the force that Dominic needs to apply in order to stop the table from moving is 12 Newtons
Newton brought a further level of specificity to the aforementioned assertion by expressing the concept of force, which is a vector variable. His First Law states that an object that has a net force of zero operating on it will either remain at rest if it was initially at rest or it will maintain a constant velocity if it was initially moving at a constant speed. If the forces were balanced, then they would nullify one another and disappear. Because of this, the overall force is equal to zero.
To make zero net force, we can calculate it by:
Net force = Shira’s force + Dominic’s force
0 = 12 N + Dominic’s force
Dominic’s force = - 12 N or 12 N (opposite direction)
Hence, Dominic needs to apply 12N (opposite direction) to stop the table from moving.
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A voltaic cell utilizes the following reaction:
2Fe3+(aq)+H2(g)→2Fe2+(aq)+2H+(aq).
You may want to reference (Pages 872 - 877) Section 20.6 and Appendix E while completing this problem.
1.What is the emf of this cell under standard conditions?
Express your answer using three significant figures.
2.What is the emf for this cell when [Fe3+]= 3.80 M, PH2= 0.95 atm, [Fe2+]= 0.0008 M, and the pH in both compartments is 3.80?
Express your answer using two significant figures.
The half-reactions and balanced redox reaction for the specified voltaic cell are as follows: reduction half-reaction: 2Fe3+(aq)+2e2Fe2+(aq) E=0.77V.
What is an E cell under normal circumstances?The standard voltage gain is the prospective of the tank under uniform conditions (60 Cm for mixtures, 1 atm with gases, and pure crystals or liquids for many other elements) and a constant temperature (25 °C).
How is the E standard cell calculated?Due to the larger standard reduction potential of the silver half-cell, reduction will occur. The half-cell of tin will oxidize. The formula E0cell=E0red+E0oxid can be used to get the overall cell potential.
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Write balanced net ionic equation for the following reaction: Fe(OH)3(s) + H2SO4(aq)→? Express your answer as a chemical equation
The balanced net ionic equation is:
2Fe⁺³(aq) + 6OH⁻(s) + 6H⁺(aq) + 3SO₄⁻² (aq) → Fe₂(SO₄)₃(s) + 6H₂O(l).
How is the ionic equation discovered?All soluble ionic compounds (those denoted with a (aq)) must be broken down into their corresponding ions in order to write the ionic equation. Each ion needs to be displayed with its charge and a (aq) to signify that it is in solution. Coefficients can be used to display the quantity of each ion.
The net ionic equation is the chemical formula that only displays the substances that are directly involved in the reaction. The spectator ions are also included in a complete ionic equation, whereas a net ionic equation only displays the chemical species that are involved in a reaction.
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Rank the following acids from weakest to strongest acids:
A) HFO2, HClO2, HBrO2, HIO2
B) HIO, HIO2, HIO3, HIO4
C) The following acids are dissolved in a nonaqueous solvent such as acetone: HF, HCl, HBr, HI
The ranking of the given acids from weakest to strongest can be as follows:
A) HFO2 < HClO2 < HBrO2 < HIO2
B) HIO < HIO2 < HIO3 < HIO4
C) HF < HCl < HBr < HI
How can one determine acidity?Acidity is determined by the strength of the acid's bond to its hydrogen ion (H+). The weaker the bond, the stronger the acid. In general, acid strength increases as you go down a group in the periodic table and as the oxidation state of the central atom increases.
A) The order of acidity is based on the oxidation state of the central atom, Oxygen has -1 oxidation state, hence HIO2 has the highest oxidation state and would be the strongest acid.
B) The order of acidity is based on the oxidation state of the central atom, Iodine has -1 oxidation state and -3 oxidation state, hence HIO4 has the highest oxidation state and would be the strongest acid.
C) The order of acidity is based on the electronegativity of the central atom, Fluorine is the most electronegative element hence HF is the strongest acid, and Iodine is the least electronegative element hence HI is the weakest acid.
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What happens after having a penny in vinegar for 30 minutes?
What changes does the penny have after 10 minutes?
What changes does it have after 20 minutes?
After 30 minutes of being in vinegar, the penny will be covered in a thin layer of copper oxide.
What happens after having a penny in vinegar?After 10 minutes, the penny will have a greenish hue and it may have some bubbles on the surface.After 20 minutes, the penny will have a thicker greenish coating and more bubbles may have formed on the surface.After having a penny in vinegar for 30 minutes, the penny will have a number of visible changes.After 10 minutes, the penny will start to take on a more tarnished, dull look as the vinegar begins to dissolve the copper on the surface of the penny.After 20 minutes, the penny will start to become darker and the copper will begin to flake off.The vinegar will have also started to dissolve more of the copper, further discoloring the penny.After 30 minutes, the penny will have taken on a dark greenish-brown color and will have lost a significant amount of its copper coating.The vinegar will have completely dissolved the majority of the copper, leaving the zinc core of the penny exposed.TO learn more about having a penny in vinegar refer to:
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how many d electrons can there be in an energy level ?
10 electrons can there be in energy level
How to determine that?The d sublevel has 5 orbitals, so can contain 10 electrons max.
Electrons exist around the nucleus of an atom in discrete, specific orbits.
Electrons can not just exist at any distance from the nucleus. These orbits
are called levels and we number them 1, 2, 3, 4, and so forth with the 1st
level being the orbit closest to the nucleus.
The levels can be broken down into sublevels. We have s, p, d, and f
sublevels. Level one has one sublevel – an s. Level 2 has 2 sublevels - s
and p. Level 3 has 3 sublevels - s, p, and d. Level 4 has 4 sublevels - s, p,
d, and f. The sublevels contain orbitals. Orbitals are spaces that have a high
probability of containing an electron. In other words, an orbital is an area
where the electrons live. There can be two electrons in one orbital
maximum. The s sublevel has just one orbital, so can contain 2 electrons
max. The p sublevel has 3 orbitals, so can contain 6 electrons max. The d
sublevel has 5 orbitals, so can contain 10 electrons max. And the 4 sublevel has 7 orbitals, so can contain 14 electrons
max.
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For the following electrochemical cell Co(s)|Co^2+ (aq, 0.0155 M)||Ag^+ (aq, 2.50 M)|Ag(s)Write the net cell equation. Phases are optional. Do not include the concentrations __Calculate the following values at 25.0°C using standard potentials as neededE°cell = ___ VE cell = ___ VΔG°rxn = ___ kJ/molΔGrxn = ___ kJ/mol
The concentrations of both reactants and products are not changing. Thus, ΔGrxn = -318.2 kJ/mol.
What is concentrations?Concentration is a measure of how much of a substance is dissolved in a given quantity of a solution.
Net Cell Equation: Co(s) + 2 Ag^+(aq) → Co^2+(aq) + 2 Ag(s)
E°cell = -0.337 V
E cell = -0.337 V
ΔG°rxn = -159.1 kJ/mol
ΔGrxn = -159.1 kJ/mol
The standard potential of the cell, E°cell, is calculated by subtracting the standard reduction potential of the reduction half-reaction (Ag+ + 1e- → Ag, E° = +0.799 V) from the standard reduction potential of the oxidation half-reaction (Co → Co2+, E° = -1.136 V). Thus, E°cell = -1.136 V + 0.799 V = -0.337 V.
The cell potential, Ecell, is equal to the standard potential, E°cell, since the concentrations of both reactants and products are not changing. Thus, Ecell = -0.337 V.
The standard reaction Gibbs free energy, ΔG°rxn, is calculated by subtracting the Gibbs free energy of the products (2 Ag(s): ΔG°f = 0 kJ/mol) from the Gibbs free energy of the reactants (Co(s): ΔG°f = 0 kJ/mol, 2 Ag+ (aq): ΔG°f = -318.2 kJ/mol). Thus, ΔG°rxn = 0 kJ/mol - (-318.2 kJ/mol) = -318.2 kJ/mol.
The reaction Gibbs free energy, ΔGrxn, is equal to the standard reaction Gibbs free energy, ΔG°rxn, since the concentrations of both reactants and products are not changing. Thus, ΔGrxn = -318.2 kJ/mol.
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In which of the following aqueous solutions would you expect AgBr to have the lowest solubility?
Select one:
a. 0.010 M AgNO3
b. 0.040 M NaBr
c. pure water
d. 0.040 M KBr
e. 0.040 M SrBr2
"0.040 M SrBr2" is option (e). As all other alternatives have higher concentrations of common ions than Cu+ or Br-, the lowest concentration of Br- is 0.0100 M.
Explanation:
- The ordinary ion Br- has a higher concentration in 0.040 M solution, which in itself is 2 x 0.040 М = 0.080 M higher content than all the choices. Due to the common ion effect, which is caused by the presence of Ag+ or Br-, as AgBr's equilibrium shifts in a backward direction, the immersion of AgBr will decrease.
Among the following aqueous media would you anticipate to have AgCl's solubility to be the lowest?
Since water serves as the solvent over all instances, the maximum amount of Ag+ and Cl- AgCl may be the least sensitive of all the ions that can be precipitated in the BaCl2.
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"0.040 M SrBr2" is option (e). As all other alternatives have higher concentrations of common ions than Cu+ or Br-, the lowest concentration of Br- is 0.0100 M.
Among the following aqueous media would you anticipate to have AgCl's solubility to be the lowest?Since water serves as the solvent over all instances, the maximum amount of Ag+ and Cl- AgCl may be the least sensitive of all the ions that can be precipitated in the BaCl2.
- The ordinary ion Br- has a higher concentration in 0.040 M solution, which in itself is 2 x 0.040 М = 0.080 M higher content than all the choices. Due to the common ion effect, which is caused by the presence of Ag+ or Br-, as AgBr's equilibrium shifts in a backward direction, the immersion of AgBr will decrease.
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what is the pH of a 0.014 M Ca(OH)2 solution?
the answer is supposed to be 12.45 but i keep getting12.15
here is how i am doing it
-log(0.014)=1.85
then i do 14-1.85=12.15
what am i doing wrong???
step by step gets lifesaver!!!
Ca(OH)2 entirely separates into Ca + and OH- ions due to its strong basic nature.
Is NH3 a powerful base?A example weak base is ammonia. Hydroxide ions are plainly absent from ammonia itself, but they are produced when it interacts with water. At any one time, roughly 99% of the ammonia is still present as ammonia molecules since the process is reversible.
Is NaOH a powerful base?NaOH totally separates from water to produce Na+ and OH. Because all accessible [OH] in NaOH is present in solution as [OH] and ready to take protons, it is regarded as a strong base.
[ OH-] = 2 *0.014M
= 0.028 M
pOH = - log ( 0.028 )
= 1.55
pH = 14 - pOH
= 12.44
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How many formula units are in a sample of salt with a mass of 67.69 grams
Answer:
1.16mol of NaCl
Explanation:
Question:
1. How many formula units are in 67.69 grams of salt?
2. How many molecules are in 44.99 grams of water?
Converting mass to moles:
In a given amount of moles (n) of a substance there will be a given amount of mass (m) of that substance. m and n are related by the molar mass (M):
m = n x M
Hence, if we want to find n, we must rearrange the equation:
n = m/M
Answer and Explanation:
The word 'salt' in this question will be assumed to mean table salt - sodium chloride, NaCl - with a molar mass of 58.44g/mol.
Hence, 67.96g will contain 67.69g / 58.44g/mol = 1.16mol of NaCl.
We convert from moles to number of molecules/formula units by multiplying by Avogadro's constant(6.02×10²³):
1.16 x 6.02×10²³ = 6.98×10²³
formula units of NaCl
Water has a molar mass of 18.02g/mol. Therefore, 44.99g of water will represent 44.99g / 18.02g/mol = 2.50mol of water.
2.50 x
6.02
×
10
23
=
1.505
×
10
24
molecules of water
Suppose the beam consists of a mixture of 12C and 14C ions. If v and B have the same values as in part B, calculate the separation of these two isotopes at the detector. Express your answer with the appropriate units.
This beam separation should allow for easy separation of the two ions .∆R = 4 cm if the beam consists of a mixture of 12C and 14C ions.
What is an example of a chemical separation?A simple example of chemical separation is the use of desiccants to remove water from a gas stream. The percentage of carbon dioxide in blast furnace gas may be determined by measuring the thermal conductivity of the gas before and after selective removal of the carbon dioxide by passing the gas through soda lime.
What is nature of separation?The Parties agree that the termination of the employment relationship between the Parties shall be treated as a separation by mutual agreement of the Parties.
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According to the tile, how many moles of CO react with one mole of Fe2O3?
Answer: 3 Moles
Explanation: The reaction suggests that 1 mol of Fe₂O₃ reacts with 3 moles of CO and forms 2 moles of Fe and 3 moles of CO₂. If 1 mol of Fe₂O₃ reacts with 3 moles of CO. Hence, 5.25 mol of CO reacts with 1.75 moles of Fe₂O₃.
two types of thermometers and their characteristics
Answer:
Touch, or contact, thermometers must touch the body in order to measure temperature. Remote, or no-contact, thermometers can measure body temperature without touching the skin.
Explanation:
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Find the angle between each of the following pairs of vectors A⃗ =Axi^+Ayj^ and B⃗ =Bxi^+Byj^.
Part A
Ax1= -2.20, Ay1= 5.00; Bx1= 2.10, By1= -3.00.
Part B
Ax2= 3.40, Ay2= 5.80; Bx2= 10.6, By2= 6.80.
The angle between each of the following pairs of vectors A⃗ =Axi^+Ayj^ and B⃗ =Bxi^+Byj^ is A) α = 169° B) α = 26.85°
What is vector?In mathematics and physics, vector is a term that refers to some quantities that cannot be expressed by single number, or to elements of some vector spaces.
A) Given, Ax1= -2.20, Ay1= 5.00 Bx1= 2.10, By1= -3.00.
A.B= ( -2.20i + 5.00j) + (2.10i + 3.00j)
A.B = -19.62
Module of vector A= √ (-2.20)² +(5)²= 5.46
Module of vector B= √ (2.10)² +(-3)² = 3.66
α = cos^-1( A.B/ A B)
= cos^-1( -19.62/ 5.46* 3.66)
α = 169°
B) Given, Ax2= 3.40, Ay2= 5.80; Bx2= 10.6, By2= 6.80.
A.B= ( 3.40i + 5.80j) + (10.6i + 6.80j)
A.B = 75.48
Module of vector A= √ (3.40)² +(5.80)²= 6.72
Module of vector B= √ (10.6)² +(6.80)²= 12.59
α = cos^-1( A.B/ A B)
= cos^-1( 75.48/ 6.72* 12.59)
So, α = 26.85°
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4. assume that the water stream is replaced by a stream of cci.. predict what would happen in each case:
a. charged comb
b. pvc pipe
c. charged balloon
By assuming that the water stream is replaced by a stream of cci. Now (a) in case of charged comb ions would likely be deflected (b) in case of pvc pipe no effect on the motion of the ions, (c) in case of charged balloon ions would be deflected.
a. If a stream of charged particles, such as ions in a charged comb, were to replace the water stream, the ions would likely be deflected by the electric field created by the charged comb. This is due to the forces acting on the ions as they move through the electric field. The amount of deflection would depend on the charge and mass of the ions, as well as the strength of the electric field.
b. If a stream of charged particles were to pass through a PVC pipe, the pipe itself would not have a significant effect on the motion of the ions. The ions would continue to move in a straight line, unaffected by the pipe. However, if the PVC pipe is insulated, it will not cause any deflection.
c. A charged balloon would also create an electric field, and if a stream of charged particles were to pass through this electric field, they would be deflected. The direction and amount of deflection would depend on the charge of the particles and the strength of the electric field created by the charged balloon.
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A bicyclist is stopped at the entrance to a valley, as sketched below: Where would the bicyclist have the highest potential energy? Where would the bicyclist have the lowest potential energy? Where would the bicyclist have the highest kinetic energy? Where would the bicyclist have the highest speed? Would the bicyclist's kinetic energy be higher at B or C? Would the bicyclist's potential energy be higher at B or C? Would the bicyclist's total energy be higher at B or C? Suppose the bicyclist lets off the brakes and coasts down into the valley without pedaling. Ever if there is no friction or air resistance to slow him down, what is the farthest point the bicyclist could reach without pedaling?
The energy that arises from a location is known as potential energy.
The energy attributed to motion is known as kinetic energy.
1. As the highest point on the road, F point has the most potential energy.
2. The lowest potential energy is present at D point, the lowest point on the route.
3. Point B will have the maximum kinetic energy since there, all of point A's potential energy is converted to kinetic energy.
4. At point B, the speed will be at its highest since all of the potential energy has been transformed into kinetic energy.
What is the straightforward meaning of potential energy?Potential energy is a form of stored energy that is dependent on the interactions between different system components. When a
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4 importance of alkene our daily life?
1.) Alkenes are important building blocks in organic synthesis. They are widely used as starting materials for the preparation of other organic compounds, such as alcohols, ethers, and aldehydes.
2.) Alkenes are widely used in the polymer industry to make a wide range of plastics, such as polyethylene and polypropylene, which are used in packaging, textiles, and consumer goods.
3.) Alkenes are used in catalytic processes, such as catalytic cracking and dehydrogenation, to produce important chemicals such as gasoline, diesel fuel, and ethylene, which are used in the production of many other chemicals.
4.) Alkenes are also important in petrochemical industry as starting materials for the production of many other chemicals such as solvents, lubricants, and other products. Alkenes are also used as intermediates in the synthesis of fine chemicals such as pharmaceuticals, agrochemicals and fragrances.
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Classify each solid as a covalent, ionic, metallic, or molecular solid.
a. pure sodium
b. white phosphorus
c. sodium sulfide
d. frozen carbon dioxide
Ionic bonds are formed by potassium iodide (KI). Iodine and potassium have highly dissimilar electronegativities. Since ionic bonds are formed between atoms with a significant difference, the two would join together.
Is sodium sulfide metallic, molecular, or covalently ionic?A substance with the formula Na2S N a 2 S is sodium sulfide. This is an ionic compound since it consists of a metal and a non-metal.
Is NaCl covalent or metallic?covalent fusion. The creation of ions by the passage of electrons results in the formation of ionic compounds like sodium chloride (NaCl). Ionic bonds are created when ions interact electrostatically.
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What volume, in liters, of 1.0 M C6H1206 solution can be made using 360.4 g C6H12O6?
Answer:
2
Explanation:
M=mole/liters
C6H12O6; 180.2 g/mol
360.4g / 180.2 g per mol = 2. we have 2 moles now.
M=mole/liters
1M=2mole/xliters
2/1=2
2x2=1
1M=2/2
x=2
Answer:
2
Explanation:
Acellus
Find the percent composition of Carbon in a substance that contains 2.59 g Carbon, 39.56 g Sulfur, and 43.03 g of Oxygen
To find the percent composition of Carbon in a substance, you need to calculate the percent of the total mass that is made up of Carbon.
The first step is to add up the masses of all the elements in the substance to get the total mass:
2.59 g Carbon + 39.56 g Sulfur + 43.03 g Oxygen = 85.18 g
Next, divide the mass of Carbon by the total mass and multiply by 100 to get the percent of the total mass that is Carbon:
(2.59 g Carbon / 85.18 g) * 100 = 3.03% Carbon
So, the percent composition of Carbon in the substance is 3.03%.
calculate the molarity of a solution made by diluting 300. ml of a 18.0m hcl solution to a volume of 3500.ml.
Molarity is a unit of concentration that expresses the number of moles of solute per liter of solution. To calculate the molarity of a solution made by diluting a concentrated solution, you can use the following formula:
Molarity = moles of solute / liters of solution
First, you have to calculate the number of moles of solute in the original solution, you can use the formula:
moles of solute = molarity x liters of solution
moles of solute = 18.0 M x 0.3 L = 5.4 moles
Then, you can use this value to calculate the molarity of the dilute solution:
Molarity of dilute solution = moles of solute / liters of solution
Molarity of dilute solution = 5.4 moles / 3.5 L = 1.54 M
So, the dilute solution has a molarity of 1.54 M.
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A cylinder and piston assembly (defined as the system) is warmed by an external flame. The contents of the cylinder expand, doing work on the surroundings by pushing the piston outward against the external pressure. If the system absorbs 586 J of heat and does 363 J of work during the expansion, what is the value of ΔE?
The value of ΔE is 223J when a cylinder and piston assembly (defined as the system) is warmed by an external flame.
The energy in the system must conserve according to the first law of thermodynamics:
ΔE = Q - W
In this equation, E stands for internal energy, Q for heat flow (which is positive if the system absorbs the heat and negative if it releases heat), and W for work (positive if the system is expanding, and negative if the system is compressing).
Q so equals +586 J, and W equals +363 J.
ΔE = 586 - 363
ΔE = 223J
A version of the law of conservation of energy modified for thermodynamic processes is known as the First Law of Thermodynamics.
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the empirical formula for the two compounds that have very diffrent properties is ch2). if the molar mass of compound a is 60.05 g/mol and compound b is 180.16 g/mol, what are the molecular formulas for these compounds?
The molecular formula of compound A is C₂H₅., the molecular formula for compound B is C₇H₁₄.
What is empirical formula?Empirical formula is the most straightforward formula for a compound and provides the ratio of various atoms found in each compound molecule.
The empirical formula for the two compounds is CH₂. To determine the molecular formula, we need to know the molar mass of the compounds.
If the molar mass of compound A is 60.05 g/mol, and the empirical formula is CH₂, we can calculate the molecular formula by dividing the molar mass by the molar mass of the empirical formula.
60.05 g/mol / (12.01 g/mol + 2 x 1.01 g/mol) = 2.5
Therefore, the molecular formula for compound A is C₂H₅
Similarly, if the molar mass of compound B is 180.16 g/mol, and the empirical formula is CH₂, we can calculate the molecular formula by dividing the molar mass by the molar mass of the empirical formula.
180.16 g/mol / (12.01 g/mol + 2 x 1.01 g/mol) = 7.5
Therefore, the molecular formula for compound B is C₇H₁₄.
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Draw the structure of (S)-5,5-dibromo-3-fluoro-2-methyl-3-hexanol.
The molecular structure is obtained by solving the Schrödinger equation, a quantum mechanical equation for the motion of electrons in the field of nuclei.
What is molecular structure?The three-dimensional configuration of the atoms that make up a molecule is known as molecular geometry. In addition to bond lengths, bond angles, torsional angles, and any other geometrical factors that affect each atom's position, it also includes the molecule's overall shape. The Schrödinger equation, a quantum mechanical equation for the motion of electrons in the field of nuclei, can theoretically be used to determine the molecular structure. The bond lengths and bond angles in a molecular structure are those where the molecular energy is lowest.
Here,
The structure is in image.
The Schrödinger equation, a quantum mechanical equation for the motion of electrons in the field of nuclei, is solved to yield the molecular structure.
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