Answer:
0.101 M
0.1 mol/kg
0.644
Explanation:
To calculate the molarity, molality, and mole fraction of Na2SO4 in a solution, you need to know the moles of Na2SO4 in the solution and the volume or mass of the solution.
A) Molarity: Molarity (M) is defined as the number of moles of solute per liter of solution. To calculate molarity, we need to divide the number of moles of Na2SO4 by the volume of the solution in liters.
First, calculate the number of moles of Na2SO4:
mass of Na2SO4 = 755 g
molecular weight of Na2SO4 = 142 g/mol
number of moles = mass/molecular weight = 755 g / 142 g/mol = 5.34 moles
Next, calculate the volume of the solution:
mass of water = 53,100 g
density of water = 1 g/mL
volume of water = mass/density = 53,100 g / 1 g/mL = 53,100 mL = 53.1 L
Finally, calculate the molarity:
molarity = number of moles / volume of solution = 5.34 moles / 53.1 L = 0.101 M
B) Molality: Molality (m) is defined as the number of moles of solute per kilogram of solvent. To calculate molality, we need to divide the number of moles of Na2SO4 by the mass of the solvent in kilograms.
mass of water = 53,100 g
mass of solvent in kilograms = mass in grams / 1000 g/kg = 53,100 g / 1000 g/kg = 53.1 kg
Finally, calculate the molality:
molality = number of moles / mass of solvent = 5.34 moles / 53.1 kg = 0.1 mol/kg
C) Mole fraction: The mole fraction (X) is defined as the ratio of the number of moles of solute to the total number of moles of solute and solvent in a solution. To calculate the mole fraction of Na2SO4, we need to divide the number of moles of Na2SO4 by the total number of moles of Na2SO4 and water.
number of moles of Na2SO4 = 5.34 moles
number of moles of water = 53.1 kg * 1000 g/kg / 18.015 g/mol = 2.96 moles
total number of moles = number of moles of Na2SO4 + number of moles of water = 5.34 moles + 2.96 moles = 8.30 moles
Finally, calculate the mole fraction:
mole fraction of Na2SO4 = number of moles of Na2SO4 / total number of moles = 5.34 moles / 8.30 moles = 0.644
The molarity of Na2SO4 in the solution is 0.101 M, the molality is 0.1 mol/kg, and the mole fraction of Na2SO4 is 0.644.
why polonium so easy to kill someone
Answer:
Polonium is a highly radioactive substance, meaning it emits ionizing radiation, which can cause harm to living organisms. When ingested or inhaled, polonium can damage internal organs, including the kidneys, liver, and bone marrow, and cause radiation sickness. This makes it a potent poison and an easy means to kill someone. Because of its toxic nature and the fact that it is not easily detectable, polonium has been used in assassination attempts, making it a dangerous substance to handle or be around.
Explanation:
Answer:
polonium is a highly radioactive and toxic element that can cause severs health problem if ingested or inhaled
Explanation:
LAPTOP CART 3
COMPUTER 15
Match the group with it's correct group name.
Group Name
1. alkaline earth metals
2. halogens
3. transiton metals
4. carbon family
5. noble gases
6. alkali metal
7. boron family
8. nitrogen family
9. oxygen family
Periodic Table Quiz
Group
a 1 or IA
-configuration
b. 2 or 2A
c. 3 or 3A
d.
14 or 4A
15 or SA
f. 16 or 6A
17 or 7A
b. 18 or SA
3B to 2B
Answer the following questions.
10. How many valence electrons do the halogens have in their valence shell?
11.How many valence electrons do the alkali metals have in their valence shell?
12. The maximum of valence electrons is?
13. The principle that the properties of the elements are arranged in increasing order of
their atomic numbers is called the
14. The group of eight electrons filling the s and p orbitals of the higher-most energy
level of an atom is called
15. Give the noble gas for Al
16. Give the configuration for Ca
17. Give the configuration for Ca ion
18. Give the configuration for the elements that are isoelectronic with Neon (Ne) when
they form a l' ion element name
e-configuration
e-configuration
19.
1-ion element name
20. Which group of elements is the least reactive?
fout act
l
wwww yo
WHEAT AND
Group 1 (Alkali Metals)
Group 2 (Alkaline Earth Metals)
Group I: Lithium and sodium make up the elements.
Chlorine and bromine are the elements in Group I7.
Neon and argon are the elements in Group I8.
What are halogens?
The only periodic table group with elements in all three of the primary states of matter at standard pressure and temperature—though not much above room temperature—is the group of halogens. In groups 1 and 15, the same holds true if white phosphorus is assumed to be the standard state.
All of the halogens react with hydrogen to create acids.
Minerals or salts are often used to manufacture the majority of halogens.
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A team of students develop a model to describe why structural changes to genes affect proteins. The team provides two groups of students with the same materials, but one group must make a bridge while the other group makes a building. Analyze the team's model and explain why it incorrectly models the impact of gene mutations on proteins.
The team provides two groups of students with the same materials, but one group must make a bridge while the other group makes a building. The bridge model is correct.
What is gene ?A gene is the fundamental and structural unit of the hereditary that codes for specific information and proteins required for signaling and cell function.
A mutation or change in the sequence of the region will result in the modification of the proteins coded, resulting in a change in the genotype and phenotype.
If a gene is mutated and the proteins change, the entire sequence and the information for which it codes will change in the building model.
Thus, gene mutation will impact the proteins.
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HELP ! Pictures down below (70 points)
For a given mass of gas at a constant temperature, when volume decreases pressure increases.
For at a constant temperature, when mass decreases pressure increases.
What is the effect of a decrease in volume on the pressure of gases?According to Boyle's Law, at a constant temperature, the pressure of a gas is inversely proportional to its volume.
Thus, a decrease in the volume of a gas will result in an increase in pressure, assuming that the temperature and amount of gas remain constant.
Assuming that the temperature and volume remain constant, an increase in the mass of a gas will result in an increase in its pressure. This is because as the mass of the gas increases, the number of gas particles also increases, which leads to an increase in the frequency and force of their collisions with the container walls. These increased collisions result in an increase in the pressure of the gas.
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Which substance can be classified as an Arrhenius acid
Answer:
HCl (Hydrochloric acid) can be classified as an Arrhenius acid.
Explanation:
An Arrhenius acid is a substance that donates hydrogen ions (H+) in an aqueous solution, resulting in an increase in the hydrogen ion concentration (pH). Examples of Arrhenius acids include hydrochloric acid (HCl), sulfuric acid (H2SO4), and nitric acid (HNO3).
Answer:
HCl (Hydrochloric acid)
Explanation:
Which group would most benefit from the claim?
O people who sell coffee with caffeine
• people who sell decaffeinated tea
• diners that serve only drinks without caffeine
O manufacturers of caffeine-free bottled fruit juice
The group that would most benefit from the claim is people who sell coffee with caffeine.
What was the claims assertion?Caffeine increases mental alertness, making it ideal for activities related to the workplace because it makes a person more attentive, aware of their surroundings, and better able to keep up with tasks.
Caffeine enhances motor coordination, which is the capacity to coordinate various body parts to produce complicated movements. Among those who are active, the capacity to enhance motor coordination may increase need for caffeine.
The organizations who would gain most from the claim are the dealers in caffeinated items, including; based on the link of caffeine with benefits that are desired by active people (working people who earn income).
Therefore, option A is correct.
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What are the differences between an endothermic and exothermic reaction?
Answer:
Exothermic-Producing heat
Endothermic-absorbing heat
Answer:
An endothermic reaction is a chemical reaction that absorbs heat energy, causing the temperature of the system to decrease. An exothermic reaction is a chemical reaction that releases heat energy, causing the temperature of the system to increase.
Explanation:
Count the number of atoms in the formula: 2Ca(OH)2
Ca atoms
There are
type your answer...
There are
type your answer...
There are type your answer...
O atoms
Hatoms
The total number of atoms is type your answer...
The total number of atoms in the formula is 2 + 4 + 4 = 10 atoms.
What are atoms?
An atom is the basic unit of matter and the defining structure of elements. The term "atom" comes from the Greek word for indivisible, because it was once thought that atoms were the smallest things in the universe and could not be divided.
Atoms are composed of a nucleus, which contains positively charged protons and uncharged neutrons, surrounded by a cloud of negatively charged electrons. The number of protons in an atom's nucleus determines what element the atom is, as each element has a unique number of protons.
To count the number of atoms in the formula 2Ca(OH)2, we need to determine the number of each type of atom present.
In this formula, there are:
2 calcium atoms (Ca)4 oxygen atoms (O)4 hydrogen atoms (H)So, the total number of atoms in the formula is 2 + 4 + 4 = 10 atoms.
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Why does boiling water cook food so well?
Answer: Boiling Water enhances the texture of foods and tougher proteins, making them more edible.
Explanation: WHAT ELSE CAN IT DO?It's also hot enough to kill microbes, firm meats and fish, and soften vegetables
I truck travel down the highway speed of 110 km/hr how long does a trip last the truck cover 2,200 km?
Answer:
20 hours
Explanation:
The time it takes for the truck to travel 2,200 km at a speed of 110 km/hr is calculated by dividing the total distance by the speed:
Time = Distance / Speed
Time = 2,200 km / 110 km/hr
Time = 20 hours
So it takes the truck 20 hours to cover the 2,200 km trip at a speed of 110 km/hr.
Aɳʂɯҽɾҽԃ Ⴆყ ɠσԃKEY ꦿ
1.discuss breifly about types of quantum numbers"
Answer:
Explanation:
Quantum numbers are a set of numbers that describe the state of an electron in an atom. There are four types of quantum numbers:
Principal quantum number (n): This quantum number determines the energy level of an electron in an atom. The larger the value of n, the higher the energy level and the farther the electron is from the nucleus.
Azimuthal quantum number (l): This quantum number determines the shape of the electron orbital. The value of l can range from 0 to n-1, and it describes the angular momentum of the electron.
Magnetic quantum number (m): This quantum number determines the orientation of the electron orbital in space. The value of m can range from -l to +l, and it describes the orientation of the orbital.
Spin quantum number (s): This quantum number describes the intrinsic angular momentum, or spin, of an electron. The value of s is always ±1/2.
These four quantum numbers together describe the state of an electron in an atom, including its energy, shape, orientation, and spin. Understanding these quantum numbers is essential for understanding the behavior of electrons in atoms and for predicting the properties of chemical compounds.
Which coefficients correctly balance the equation below
KOH+BaCI- -> KCI + Ba(OH)2
2,2,2,1
1,2,1,2
2,1,2,1
2,2,2,1
The coefficients that correctly balance the equation below would be 2,1,2,1. The third option.
Balancing chemical equationsA balanced chemical equation will have an equal number of different atoms in the reactants and in the products, irrespective of whether there is a change of form or otherwise.
Thus, the balanced equation of the reaction whose equation is shown would be: [tex]2KOH+BaCI_2- - > 2KCI + Ba(OH)_2[/tex]
In other words, the coefficients of the correctly balanced equation are 2,1,2,1.
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(b) Levetiracetam is the (S) enantiomer of the memory-enhancing racemic drug called etiracetam. What do you think inspired the name of levetiracetam?
Since the configuration is such that we call it sinister (left). That inspired the name.
What is stereochemistry?The stereochemistry has to do with the study of the arrangement of the atoms and the groups that are in a compound. In this case, we can see that the compound that we have in the question has an (S) configuration and the meaning of this is that we can be able to arrange the priority groups from the left hand side as shown.
This can now explain to us that since the configuration is sinister then the name of the compound that is under study here can now be called Levetiracetam.
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A reaction vessel is charged with 0.50 atm of A and 0.130 atm of B. Once the reaction reaches equilibrium, what is the equilibrium partial pressure of B? Kp for this reaction is 67.2
A (g) ⇌ 2 B (g)
If a reaction vessel is charged with 0.50 atm of A and 0.130 atm of B. Once the reaction reaches equilibrium, the equilibrium partial pressure of B is: 5.79 atm.
What is the equilibrium partial pressure of B?To calculate the equilibrium partial pressure of B, we need to use the expression for an equilibrium constant (Kp). The equation for Kp for a reaction of the form A (g) ⇌ 2 B (g) is given by:
Kp = (P_B^2) / (P_A)
Where:
P_A and P_B are the equilibrium partial pressures of A and B, respectively.
Given that the initial pressures of A and B are 0.50 atm and 0.130 atm, respectively, and the value of Kp is 67.2, we can use the above equation to calculate the equilibrium partial pressure of B:
Kp = (P_B^2) / (P_A) = 67.2
P_A = 0.50 atm
Therefore,
(P_B^2) / (0.50 atm) = 67.2
P_B^2 = 67.2 * 0.50 atm = 33.6 atm
P_B = √(33.6 atm) = 5.79 atm
So, the equilibrium partial pressure of B is approximately 5.79 atm.
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If the volume of the reaction vessel in the previous part was 1. 25 l , what amount of br2 (in moles) was formed during the first 15. 0 s of the reaction?.
0.4 amount of br2 (in moles) was formed during the first 15. 0 s of the reaction.
A chemical reaction is a process that causes a chemical transformation of one set of chemicals into another. Classically, chemical reactions involve changes involving only the position of electrons in the formation and breaking of chemical bonds between atoms, and changes in the nucleus (no change in the elements present) can often be described by chemical equations. Nuclear chemistry is a subset of chemistry that involves the chemical reactions of unstable radioactive elements in which both electronic and nuclear changes can occur.
Now,
Correct option is (C)
N2 +O2 ⇌2NO
At t = 0 2 4 0
At eq. 2-x 4-x 2x
Half a mole of nitrogen is used up at equilibrium,
x = 0.5
So, moles of NO=1.
Molar concept of NO at equilibrium = 1/ 2.5
= 0.4.
Complete Question:
The equilibrium N₂(g)+O₂(g)⇌2NO(g) established in a reaction vessel of 2.5 L capacity. The amounts of N₂ and O₂ taken at the start were respectively 2 moles and 4 moles. Half a mole of nitrogen has been used up at equilibrium. The molar concentration of nitric oxide is :
(1) 0.2 (2) 0.8 (3) 0.6 (4) 0.1
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How does the amount of energy coming from the energy source (low vs. high) affect the amount of electrical energy released.
If (A. more), (B. less) energy is put into the system, then (A. more), (B. less) energy will be released from the system.
The quantity of electrical energy released is a function of the quantity of energy coming from the energy source (low vs. high). The system will release (A) more (B) less energy depending on how much energy is introduced into it.
What is the use of electrical energy in the system?The rotor shaft of a generator is spun or rotated by the fluid's force on the blades. The generator then transforms the kinetic (mechanical) energy of the rotor into electrical energy.
Turbines come in a variety of forms, including steam, combustion (gas), hydroelectric, and wind turbines.
At the scale that a large utility would use them, solar and wind power are currently the least expensive sources of energy. They are much less expensive than coal and nuclear power plants and slightly less expensive than natural gas-fired power plants.
Therefore, Depending on how much energy is supplied into the system, it will either (A) release more (B) or less (C).
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A beaker is known to contain 4.65x1024 molecules of sucrose, C12H22O11. How many cg of sucrose does the beaker hold?
According to the question, 1.6 x 1028 cg of sucrose does the beaker hold.
What is sucrose?
Sucrose is a type of sugar that is naturally present in many fruits and vegetables, and is also known as table sugar. It is composed of two simple sugars, glucose and fructose, and is the most common form of dietary sugar. It is used to sweeten many foods and beverages, and is also used in the food industry as a preservative. Sucrose is a disaccharide, which means that it is composed of two monosaccharides, or simple sugars, linked together.
The mass of a molecule of sucrose (C12H22O11) is 342.3 g/mol. Therefore, the number of cg of sucrose in the beaker is:
4.65 x 1024 molecules x 342.3 g/mol x 1 cg/10-2 g = 1.59 x 1028 cg
This can be further simplified to 1.6 x 1028 cg.
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Two solutions of different concentrations of acid are mixed creating 40 ml of a solution that is 32% acid. One-quarter of the solution is made up of a 20% acid solution. The remaining three-quarters is made up of a solution of unknown concentration, c.
The unknown concentration, c, of the acid in the remaining three-quarters of the solution is 36%.
Let x be the volume of the unknown concentration of the solution.
Then, the volume of the 20% acid solution is (40/4) = 10 ml.
We know that the total volume of the resulting solution is 40 ml, and the resulting solution is 32% acid.
This means the amount of acid in the solution is:
0.32 * 40 ml = 12.8 ml
Since we mixed 20% and c% solutions, we can set up an equation:
0.2 * 10 ml + c * x = 12.8 ml
Solving for c, we get:
c = (12.8 - 2)/x = 10.8/x
Since the volume of the unknown solution, x, is three-quarters of the total volume of the solution (40 ml),
x = 30 ml
Substituting x, we can solve for c:
c = 10.8/30 = 0.36
Therefore, the concentration of the acid in the remaining three-quarters of the solution is 36%.
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5.
Why do you think hydrogen (element 1) is on both sides of the periodic table? (2 marks)
Name a metal that is in the liquid state at room temperature. (1 mark)
8. Explain the difference between an atom and an ion. (2 marks)
9.
6789
6.
Will astatine (element 85) look more like
marks)
7.
Use your periodic table, pick out which atom with the highest ionization energy in these lists: (1
mark each = 4 marks)
a) Na, Sr, Be, Rb
b) B. Al, C, Si
c)
Fr, Fe, Zn, Cl
d) Cu, Ag, Au, B
10. Why is second ionization energy of atom always larger than its first ionization energy? (1 mark)
11. Which of the atoms in each of the following groups has the largest atomic radius? (1 mark each
= 3 marks)
a) Cl, Si, K
b) Cs, Ca, Be
c) N, Al, Cl
12. Arrange these groups of atoms in order of increasing atomic radius: (1 mark each = 3 marks)
a) Xe, Ar, Kr
b) K, Br, Ca
c) B, C, N
13. Explain two reasons why atomic radii increase from top to the bottom. (2 marks)
14. Explain a reason why atomic radii decrease from the left to right. (1 mark)
15. Which atom in each of the following pairs has the highest electronegativity? (1 mark each
= 3 marks)
a) Zn or Ge
b) O or Te
c) Ba or Hg
16. Which atom in each of the pairs that follow has the higher electron affinity and therefore gives off
the most energy when it forms a negative ion? (1 mark each = 3 marks)
c) Si, Ga
a) Cl, Br
b) Se, Br
Answer:
I'll only answer the first 2 questions because there are too many questions.
1) Hydrogen basically does not really belong to Group 1 or 17 of the periodic table. To be exact, there is to such an extent that some might put it under no groups at all. Hydrogen has 1 electron in its valence shell, similar to elements in group 1. Still, it also has to gain 1 more electron to attain noble gas configuration (2 electrons for 1st shell, 8 electrons for 2nd shell). Hence, no one actually knows what hydrogen should be classified in, hence classifying it into either Group 1, 17 neither or both.
2) Mercury is the only metal that will be in liquid state at room temperature at 1 atm.
Which is NOT a limiting factor when it comes to applying motivation to employees in the hospitality industry?
A limiting factor when it comes to applying motivation to employees in the hospitality industry is Payment structure.
What is the structure?The structure of a essay is straightforward and simple.It typically consists of an introduction, two to three body paragraphs and a conclusion. The introduction should introduce the main topic and provide a brief overview of what will be discussed. The body paragraphs should provide more specific details about the main topic and should include supporting evidence. The conclusion should summarize the essay and provide a final thought or opinion. It is important to keep in mind that the essay should be free of plagiarism, so it is essential to write all content in one’s own words.
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Determine an unknown concentration or volume using an acid–base titration.
Calculate the volume of 2.63×10-2 M barium hydroxide required to neutralize 16.1 mL of a 0.110 M nitric acid solution.
? mL
The volume of 2.63×10-² M barium hydroxide required to neutralize 16.1 mL of a 0.110 M nitric acid solution is 67.34mL.
How to calculate volume?The volume of a substance can be calculated using the following expression:
CaVa = CbVb
Where;
Ca = concentration of acidCb = concentration of baseVa = volume of acidVb = volume of baseAccording to this question, 2.63×10-² M barium hydroxide is required to neutralize 16.1 mL of a 0.110 M nitric acid solution.
0.0263 × Va = 16.1 × 0.110
0.0263Va = 1.771
Va = 67.34mL
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1 point
Count the number of atoms in the formula: 3Al2(SO4)3
Al atoms
There are
type your answer...
There are
type your answer...
There are type your answer...
Satoms
O atoms
The total number of atoms is type your answer...
Al atoms: 6, S atoms: 9, O atoms: 36, The total number of atoms is 51.
what is 3Al2(SO4)3 ?
3Al2(SO4)3 is a chemical formula that represents the compound aluminum sulfate. It is also sometimes written as Al2(SO4)3.
Aluminum sulfate is a white crystalline solid that is commonly used in water treatment, as a coagulating agent to remove impurities and suspended solids from water. It is also used in the paper industry, in the production of dyes and pigments, and as a food additive. Aluminum sulfate has a variety of other applications as well, such as in the production of aluminum and in the tanning of leather.
The formula 3Al2(SO4)3 indicates that the compound contains three molecules of aluminum sulfate, with a total of six aluminum atoms and nine sulfate ions. Each aluminum sulfate molecule consists of two aluminum atoms and three sulfate ions.
Al atoms: 6, S atoms: 9, O atoms: 36, The total number of atoms is 51.
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1) Precipitation reactions are ones in which ______________________________________________________.
2) Show how the cations and anions would swap in a double displacement reaction between AgNO3 and BaCl2.
The precipitation and double displacement reaction are as follows:
What is a precipitation reaction?
Precipitation reactions are ones in which two aqueous solutions containing ions react to form an insoluble solid compound, which is called a precipitate. Precipitation reactions are a type of double displacement reaction, in which cations and anions exchange partners.
These reactions typically occur when two soluble salts are mixed together, resulting in the formation of an insoluble compound. Precipitation reactions are commonly used in analytical chemistry to identify the presence of certain ions in a solution.
The double displacement reaction between silver nitrate (AgNO3) and barium chloride (BaCl2) can be written as follows:
AgNO3(aq) + BaCl2(aq) -> AgCl(s) + Ba(NO3)2(aq)
In this reaction, the silver ion (Ag+) and the chloride ion (Cl-) swap partners to form insoluble silver chloride (AgCl), which precipitates out of solution. The barium ion (Ba2+) and the nitrate ion (NO3-) also swap partners to form soluble barium nitrate (Ba(NO3)2), which remains in solution.
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A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of dimethyl sulfoxide, acetone, diethytamin, tetrahydrofuran, and carbon tetrachloride. The chemist plans to identify the unknown liquid by measuring the density and comparing to known densities. First, from her collection of Material Safety Data Sheets (MSOS), the chemist finds the following information: Next, the chemist measures the volume of the unknown liquid as 0.767 L and the mass of the unknown liquid as 682. g. Calculate the density of the liquid. Round your answer to 3 significant digits. g. cm^-3 Given the data above, is it possible to identify the liquid? yes no If it is possible to identify the liquid, do so. dimethyl sulfoxide acetone diethylamine tetrahydrofuran carbon tetrachloride times 10
Yes, it is possible to identify the liquid, and the density of the liquid is closest to 0.889 g/cm³ so the liquid is most likely tetrahydrofuran.
To calculate the density of the unknown liquid, we use the formula:
Density = Mass / Volume
Substituting the given values, we get:
Density = 682. g / 0.767 L
Density = 888.5 g/L
Rounding to three significant digits, the density of the unknown liquid is 889 g/L.
Using the information provided in the question, we can compare the density of the unknown liquid to the known densities of the listed chemicals. The densities (in g/cm³) of the chemicals are:
Dimethyl sulfoxide: 1.092
Acetone: 0.790
Diethylamine: 0.707
Tetrahydrofuran: 0.889
Carbon tetrachloride: 1.594
Comparing the density of the unknown liquid to the known densities, we see that it is closest to the density of tetrahydrofuran, which is 0.889 g/cm³. Therefore, it is likely that the unknown liquid is tetrahydrofuran.
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What mass of HCl is contained in 45.0 mL of an aqueous HCl solution that has a density of 1.19g cm ^ - 3 and contains 37.21% HCl by mass?
Answer:
0.01999 g
Explanation:
To find the mass of HCl in 45.0 mL of the solution, we need to first find the volume of the solution and then convert that volume to mass.
First, we can convert 45.0 mL to liters by dividing by 1000:
45.0 mL ÷ 1000 = 0.045 L
Next, we can find the mass of the solution by multiplying the volume by the density:
0.045 L × 1.19 g/cm³ = 0.05365 g
Now that we have the mass of the solution, we can find the mass of HCl by multiplying the mass of the solution by the concentration of HCl expressed as a decimal:
0.05365 g × 0.3721 = 0.01999 g
So, there is approximately 0.01999 g of HCl in 45.0 mL of the solution.
Compound A + Compound B —> Compound C + Compound D
———
Identify the reaction type
The type of reaction shown is a double displacement reaction.
Types of reactionThe given chemical equation represents a chemical reaction known as a double displacement or metathesis reaction.
In this type of reaction, the cations and anions of two different compounds switch places, resulting in the formation of two new compounds.
In the given equation, Compound A and Compound B react to form Compound C and Compound D by exchanging their respective cations and anions.
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Use the rate law to quantitatively explain what would happen in the following situations?
a. what would happen to the rate of the reaction if the iodide concentration was doubled?
b. what would happen to the rate of the reaction if the thiosulfate concentration was doubled?
c. what would happen to the rate of the reaction if the persulfate concentration was halved?
d. how would increasing the total volume of the solution affect the actual rate of the iodine clock reaction
A.By using the rate law it was discovered that doubling the concentration of Fe(III) doubled the reaction rate, and doubling the concentration of iodide quadrupled the reaction rate.
What is rate law ?A chemical reaction's rate law is the mathematical relationship between the rate of the reaction and the concentrations of the reactants. The rate law of a chemical reaction is determined by measuring the initial rate of the reaction at various reactant concentrations.
B.Simply changing the concentration of thiosulfate in solution allows us to see how the rate of reaction changes, If the thiosulfate ion concentration is doubled while the rate of reaction remains constant, the reaction is zeroth order in thiosulfate ion concentration.
C. Nothing happen to the rate of the reaction if the per sulfate concentration was halved.
D.The concentrations of all reactants are held constant. The total volume of the solution has no effect on the rate of the iodine clock reaction.
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A hamburger is found to contain 10.1 grams of fat, 30.3 grams of carbohydrate and 13.3 grams of protein. Calculate the percent fat, carbohydrates and protein for this sandwich. (Do not have to use dimensional analysis)
The percent fat, carbohydrates and protein for this sandwich are 18%, 56.4% and 24.71% respectively.
What is mass percentage?The mass percent might be used to denote a degree. Furthermore, it defines the component during a certain mixing. The solution composition usually frequently defined in terms of mass percentage.
It represents the amount of solute contained in a constant amount of solution. The quantity of solutes can be stated in terms of mass or moles.
Mass percent of fat= (10.1/ 53.7)×100=18%
Mass percent of carbohydrate = (30.3/ 53.7)×100=56.4%
Mass percent of protein= (13.3 / 53.7)×100=24.71%
Therefore, the percent fat, carbohydrates and protein for this sandwich are 18%, 56.4% and 24.71% respectively.
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Only few substances can be used as natural indicators. Why?
Answer:
Only few substances can be used as natural indicators because, some natural indicators do not have chemical properties which can change the color of substances.
Explanation:
Natural indicators are obtained from natural sources such as plants. Some of the common examples of natural indicators include red cabbage, turnip skin, cherries, beetroots and more. The natural indicators will help individuals distinguish if it is a base or an acid.
Given the following list from the activity se- ries of metals (from most active to least ac- tive) K, Na, Al, Mn, Cr, Cd, Co, Pb, Hg which reaction would you NOT expect to occur?
1. Na(s) + Mn2+(aq) → Na+(aq) + Mn(s)
2. Co2+(aq) + Al(s) → Al3+(aq) + Co(s)
3. Cd(s) + Pb2+(aq) → Pb(s) + Cd2+(aq)
4. Al3+(aq) + Cr(s) → Cr3+(aq) + Al(s)
5. All of the listed reactions will occur.
Answer:
Explanation:
According to the activity series of metals, the reaction that would not be expected to occur is:
Al3+(aq) + Cr(s) → Cr3+(aq) + Al(s)
This is because aluminum (Al) is higher on the activity series and is less likely to be oxidized (lose electrons), while chromium (Cr) is lower on the activity series and is more likely to be oxidized. In this reaction, aluminum would have to be oxidized, which is not consistent with its position on the activity series.
All of the other reactions listed are expected to occur because they involve the transfer of electrons from a metal that is lower on the activity series to a metal that is higher on the series.
