To get the formula of an ionic compound from its name, we need to identify the ions present and balance their charges to determine the subscript of each ion.
Ionic compounds are composed of positively charged ions (cations) and negatively charged ions (anions). The name of an ionic compound provides information about the ions present in the compound.
In the case of calcium chloride, the name tells us that the compound contains a calcium ion (Ca²⁺) and a chloride ion (Cl⁻). To write the formula of the compound, we need to balance the charges of the ions. Since the calcium ion has a charge of +2 and the chloride ion has a charge of -1, we need two chloride ions to balance the charge of one calcium ion. Therefore, the formula of calcium chloride is CaCl₂.
To determine the formula of other ionic compounds from their names, we need to follow the same process of identifying the ions present and balancing their charges. For example, in sodium sulfide (Na₂S), the name tells us that the compound contains a sodium ion (Na⁺) and a sulfide ion (S²⁻). To balance the charges, we need two sodium ions for every one sulfide ion, so the formula of sodium sulfide is Na₂S.
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9. A 125.0-g sample of metal is heated to 100.0 °C and placed in a calorimeter that contains 250.0 g
of water. The temperature rises from 24.3 °C to 27.2 °C. What is the specific heat capacity of the
metal? Ignore the calorimeter in your analysis.
10. A 750.0-g sample of a metal is heated to 100.0 °C and placed in a calorimeter that contains
1,000.0 grams of water. The temperature starts out at 24.9 °C and ends at 26.5 °C. If the
calorimeter has a heat capacity of 1,101 J/°C, what is the specific heat of the metal?
9. The specific heat capacity of the metal is approximately 0.47 J/g°C, 10. The specific heat of the metal is approximately 0.52 J/g°C.
9-To determine the specific heat capacity of the metal, we can use the formula:
q = mmetal × cmetal × ΔTmetal + mwater × cwater × ΔTwater
where q is the heat transferred, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.
cmetal = q/(mmetal × ΔTmetal)
q = mwater × cwater × ΔTwater = (250.0 g) × (4.184 J/g°C) × (27.2°C - 24.3°C) = 3111.8 J
mmetal = 125.0 g
ΔTmetal = 27.2°C - 100.0°C = -72.8°C
cmetal = 3111.8 J/(125.0 g × -72.8°C) ≈ 0.47 J/g°C
10- To solve for the specific heat of the metal, we need to account for the heat capacity of the calorimeter as well. The heat transferred from the metal to the water is given by:
q = (mmetal × cmetal + Ccalorimeter) × ΔT + mwater × cwater × ΔT
cmetal = (q - Ccalorimeter × ΔT)/(mmetal × ΔT)
q = (1000.0 g) × (4.184 J/g°C) × (26.5°C - 24.9°C) = 1253.44 J
Ccalorimeter = 1101 J/°C
mmetal = 750.0 g
ΔT = 26.5°C - 100.0°C = -73.5°C
cmetal = (1253.44 J - 1101 J/°C × -73.5°C)/(750.0 g × -73.5°C) ≈ 0.52 J/g°C
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What is a periodic table?
Answer:
a composition of elements
two uses of sodium carbonate
Sodium carbonate, also known as washing soda or soda ash, has a wide range of applications. Sodium carbonate can be naturally occurring or synthetically produced through various methods, including the Solvay process, which is the most common method of industrial production.
Sodium carbonate, also known as washing soda or soda ash, has many uses, including:
1) Cleaning agent: Sodium carbonate is an effective cleaning agent due to its alkaline nature. It is used in laundry detergents and household cleaners to remove stains and grease from clothes and surfaces.
2) Industrial applications: Sodium carbonate is used in a variety of industrial applications. It is used in the production of glass, pulp and paper, and soaps and detergents. It is also used as a water softener and pH regulator in chemical processes.
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Sulfur hexafluoride (SF) is a gas that, like helium, alters the human voice when inhaled. However, it causes the pitch of the voice to decrease, rather than increase.
At STP, the density of SF, is 6.52g/L
and it will float or sink?
The gas sulfur hexafluoride (SF6) is significantly denser than air. SF6 is about five times denser than air at standard temperature and pressure (STP), where its density is 6.52 g/L, so it will sink.
Why the gas will sinkThe gas sulfur hexafluoride (SF6) is significantly denser than air. SF6 is about five times denser than air at standard temperature and pressure (STP), where its density is 6.52 g/L. At STP, the density of air is roughly 1.2 g/L.
SF6 sinks in air due to its high density. This means that SF6 will gradually descend to the ground and collect in low-lying locations if it is released into the sky.
It's important to remember that SF6 is a strong greenhouse gas with a protracted atmospheric lifespan. Although it has many industrial uses, including electrical insulation, its use is being phased out more and more because of its negative effects on the environment.
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when 14.5g of SO2 reacts with 20g of O2, what will be the theoretical yeild and percentage yeild of the reaction if the actual yeild is 12g ?
The theoretical yield of SO3 is 36.26 g, and the percentage yield of the reaction is 33.05% if the actual yield is 12 g.
The balanced chemical equation for the reaction between SO2 and O2 is:
2SO2 + O2 -> 2SO3
Using stoichiometry, we can calculate the theoretical yield of SO3:
Molar mass of SO2 = 64 g/mol
Molar mass of O2 = 32 g/mol
Molar mass of SO3 = 80 g/mol
The limiting reactant in this case is SO2 because it produces less product compared to O2. Therefore, the amount of SO3 produced is based on the amount of SO2 present.
Moles of SO2 = 14.5 g / 64 g/mol = 0.2266 mol
Moles of O2 = 20 g / 32 g/mol = 0.625 mol
From the balanced equation, we can see that 2 moles of SO2 react with 1 mole of O2 to produce 2 moles of SO3. Therefore, the moles of SO3 produced is:
Moles of SO3 = 2 x 0.2266 mol = 0.4532 mol
The theoretical yield of SO3 is calculated by multiplying the moles of SO3 by its molar mass:
Theoretical yield of SO3 = 0.4532 mol x 80 g/mol = 36.26 g
The percentage yield can be calculated using the following formula:
Percentage yield = (actual yield / theoretical yield) x 100
Substituting the values, we get:
Percentage yield = (12 g / 36.26 g) x 100 = 33.05%
Therefore, the theoretical yield of SO3 is 36.26 g, and the percentage yield of the reaction is 33.05% if the actual yield is 12 g.
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Mole questions Chemistry Copper is a product of the reaction that occurs when dry ammonia is passed over a sample of heated copper (II) oxide. The equation for the reaction is given below: 1. 2NH3 + 3CuO → 3Cu + 3H₂O + N₂. Calculate the mass of copper produced if 0.12 dm³ of nitrogen is produced a room temperature and pressure rtp), [Relative atomic mass of Cu = 64; One mole of gas occupies 24dm³ at rtp.] (4 marks)
The mass of copper produced is 0.48 g.
From the balanced equation, we can see that 2 moles of NH3 produce 1 mole of N2. Therefore, the number of moles of N2 produced from 0.12 dm³ (120 cm³) of N2 gas at RTP can be calculated as:
n(N2) = (volume of gas at RTP) / (molar volume at RTP)
n(N2) = (120 cm³) / (24 dm³/mol)
n(N2) = 0.005 mol
According to the balanced equation, 3 moles of Cu is produced for every 2 moles of NH3. Therefore, the number of moles of Cu produced can be calculated as:
n(Cu) = (3/2) * n(N2)
n(Cu) = (3/2) * 0.005 mol
n(Cu) = 0.0075 mol
The molar mass of Cu is 64 g/mol. Therefore, the mass of copper produced can be calculated as:
mass(Cu) = n(Cu) * M(Cu)
mass(Cu) = 0.0075 mol * 64 g/mol
mass(Cu) = 0.48 g
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Methane (CH_4) gas is used for heating in many applications. It is gas used to fuel the Bunsen burners in this classroom. The chemical equation for the combustion of methane is given. Answer the following questions.
CH_4 + 2O_2 --> CO_2 + 2H_2O
1.) Will the ∆H for the combustion of methane be +890 kJ/mol or -890kJ/mol? Explain.
2.) Is energy a reactant or a product in this reaction?
sign of ∆H :-
+ve means endothermic reaction -ve means exothermic reactionWe know
when methane burns in presence of oxygen heat is released as a form of energy so the reaction is exothermic.∆H must be -ve
#2
Product as energy is released so it will be in right sidehat is the charge of a magnesium ion? +
The charge that we have on the magnesium ion can be seen to be + 2
How do you know the charge on the magnesium ion?By looking at the position of the magnesium ion on the periodic table, it is possible to establish its charge. Magnesium is a metal that is classified in Group 2 of the periodic table, often known as alkaline earth metals.
Having two valence electrons, group 2 metals frequently lose these electrons to create cations with a 2+ charge. Consequently, the magnesium ion has a charge of +2.
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Of the following, which atom has the smallest atomic radius:
Sb
As
Rb
Ba
OK
Answer:
Rubidium (Rb)
Explanation:
Sb: 206pm
As: 185pm
Rb: 303pm
Ba: 268pm
need to know who to do this
Answer: Shown below
Explanation:
CaCl2=calcium chloride
Mg(NO3)2=Magnesium nitrate
ZaCl2=Zinc Chloride
NH2Cl=Chloramine
AgNO2=Silver nitrate
NaCl= Sodium chloride
KI=Potassium iodide
PbSO4=Lead(II) Sulfate
n82CO3=Sodium carbonate
KNO3=Potassium nitrate
N82SO4=Sodium Sulfate.
I hope this helped please give Brainliest!
The name of the compounds and the involved ion are as follows;
CaCl₂ = Calcium chloride (Ca²⁺, 2Cl⁻)Mg(NO₃)₂ = Magnesium nitrate (Mg²⁺, NO₃²⁻)ZnCl₂ = Zinc Chloride (Zn²⁺, 2Cl⁻)NH₂Cl = Chloramine (NH₂⁺, Cl⁻)AgNO₂ = Silver nitrate (Ag⁺, NO₂⁻)NaCl = Sodium chloride (Na⁺, Cl⁻)KI = Potassium iodide (K⁺, I⁻)PbSO₄ = Lead(II) Sulfate (Pb²⁺, SO₄²⁻)Na₂CO₃ = Sodium carbonate (2Na⁺, CO₃²⁻)KNO₃ = Potassium nitrate (K⁺, NO₃²⁻)Na₂SO₄ = sodium sulphate (2Na⁺, SO₄²⁻)What is an ionic compound?Ionic compound is any of a large group of chemical compounds consisting of oppositely charged ions, wherein electron transfer, or ionic bonding, holds the atoms together.
Ionic compounds, when in an aqueous solution, dissociates into its respective ions. This question gives the chemical formula of certain compounds. For example, the sodium ions attract chloride ions and the chloride ion attracts sodium ions. The result is a three-dimensional structure of alternate Na⁺ and Cl⁻ ions.
The names of the chemical compound and the ionic elements that make them up are given in the main answer part.
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Which amphibian organ has a high blood supply and many folds to increase surface area?
a. heart
b. stomach
c. lungs
d. brain
Answer:
lungs
Explanation:
A hermit lives in a mountain cabin 50 miles outside of town. The hermit received a letter that their cabin is outside of the electric company’s range and they will no longer be able to access the power grid. The hermit is worried because the mountain region experiences several months with below-freezing temperatures each year. With no electrical energy available, which method would most likely provide enough thermal energy to heat the hermit’s cabin?
With no electrical energy available, conduction would most likely provide enough thermal energy to heat the hermit’s cabin.
Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.
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Assume that 0.491 g of diborane is combusted in a calorimeter whose heat capacity (Ccalorimeter) is 7.854 kJ/°C at 19.63°C. What is the final temperature of the calorimeter?
Answer:
The combustion of diborane (B2H6) is as follows:
2B2H6(g) + 6O2(g) → 4H2O(g) + B4O(g)
The balanced chemical equation shows that 2 moles of B2H6 react with 6 moles of O2 to produce 4 moles of H2O and 1 mole of B4O. We can use this information to calculate the amount of heat released by the combustion of 0.491 g of B2H6:
0.491 g B2H6 × (1 mol B2H6/27.67 g B2H6) × (1 mole B4O/2 moles B2H6) × (-2037 kJ/mol B4O) = -7.89 kJ
The negative sign indicates that the reaction releases heat.
The heat released by the reaction is absorbed by the calorimeter, which causes its temperature to increase. We can use the equation:
q = Ccalorimeter × ΔT
where q is the amount of heat absorbed by the calorimeter, Ccalorimeter is the heat capacity of the calorimeter, and ΔT is the change in temperature of the calorimeter.
Rearranging the equation, we get:
ΔT = q/Ccalorimeter
Substituting the values we obtained, we get:
ΔT = (-7.89 kJ)/(7.854 kJ/°C) = -1.005°C
The negative sign indicates that the temperature of the calorimeter decreases by 1.005°C. Therefore, the final temperature of the calorimeter is:
19.63°C - 1.005°C = 18.625°C
Rounding to the appropriate number of significant figures, the final temperature of the calorimeter is 18.6°C.
Hope this is what you are looking for.
6.802 x 1020 particles of Mn(NO3)3 is dissolved in 0.38 L of water.
What is the concentration of this solution in molarity?
A) 3.5 x 10-2M
B) 3.0 x 10 M
C) 0.30M
D) 0.38M
The concentration of the solution in molarity, given that 6.802×10²⁰ particles were dissolved in 0.38 L of water is 3.0×10⁻³ M (option B)
How do i determine the molarity of the solution?First, we shall determine the number of mole that contains 6.802×10²⁰ particles of Mn(NO₃)₃. Details below:
From Avogadro's hypothesis,
6.022×10²³ particles = 1 mole of Mn(NO₃)₃
Therefore, we can say that
6.802×10²⁰ particles = 6.802×10²⁰ / 6.022×10²³
6.802×10²⁰ particles = 0.001 mole of Mn(NO₃)₃
Finally, we shall obtain the molarity of the solution. Details below:
Number of mole of Mn(NO₃)₃ = 0.001 moleVolume of solution = 0.38 LMolarity of solution = ?Molarity of solution = mole / volume
Molarity of solution = 0.001 / 0.38
Molarity of solution = 3.0×10⁻³ M (option B)
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What is the structure for (CH3)2CHCH2CH(CH3)CH3?
The structure of the compound (CH₃)₂CHCH₂CH(CH₃)₂ (2,4-Dimethylpentane) is shown in the attached image.
What is 2,4-Dimethylpentane?The compound (CH₃)₂CHCH₂CH(CH₃)₂ is a 2,4-Dimethylpentane.
Iso-octanes or 2,4-Dimethylpentanes have unique qualities that make them ideal tools for measuring gasoline quality. They are hydrocarbon compounds made up of carbon and hydrogen atoms [C7H16] that belong to the class of alkanes.
Clear in color and highly volatile yet stable under typical conditions makes them excellent references for determining gasoline performance via octane ratings.
Interestingly enough, they happen to be one of several structural isomers found within hydrocarbons like octanes which themselves contain several representative molecules at positions along the chain.
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Correct question:
What is the structure for (CH3)2CHCH2CH(CH3)2?
please help I need this finished asap. Please put answers down below.
Image 1
1) There is more proton repulsion in Uranium than in Barium
2) Barium experiences a stronger force holding the nucleons together
3) The repulsion of the neutrons in Uranium makes the nuclide unstable
4) The higher the atomic number, the more likely that the nucleus is radioactive.
5) U-238 has 146 neutrons
6) U - 235 has 143 neutrons
Image 2;
1) You can minimize background radiation by limiting your outdoor exposure.
2) Cosmic radiation is the most difficult to avoid.
What is background radiation?The natural radiation that is constantly present in the environment is known as background radiation.
It includes internal radiation found in all living things as well as cosmic radiation, which originates from the sun and stars and terrestrial radiation, which originates from the Earth.
We know that the repulsion of the protons in the Uranium nucleus is more than that of the barium nucleus because there are more neutrons in the Uranium nucleus. It is this repulsion that makes Uranium unstable.
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3)
If I contain 43 moles of gas in a container with a volume of 260 liters and at a
temperature of 400 K, what is the pressure inside the container?
The pressure inside the container is approximately 5.43 atmospheres.
What is the pressure of the gas?The Ideal gas law or general gas equation is expressed as;
PV = nRT
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK )
Given that:
Amount of gas n = 43 moles
Volume V = 260 Liters
Temperature K = 400 K
Pressure P = ?
To determine the pressure of the gas, plug the given values into the above formula and solve for pressure.
PV = nRT
P = nRT / V
P = ( 43 × 0.08206 × 400 ) / 260
P = 1411.432/260
P = 5.43 atm
Therefore, the pressure of the gas is 5.43 atm.
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What are three signs that a chemical change has taken place?
Answer:
Explanation: 1) temperature change
2) colour change
3) odor (any particular smell)
Other images based on previous question
A colored substance that is entirely or almost entirely insoluble in water is called a pigment and organic molecule.
Thus, Contrarily, dyes are usually soluble, at least initially, during their use. In general, pigments are frequently inorganic substances while dyes are frequently organic molecules.
The global market for inorganic, organic, and specialty pigments reached around 7.4 million tons in 2006.
In a report published in April 2018 by Bloomberg Businessweek, the pigment sector was predicted to be worth $30 billion globally.
Titanium dioxide, which is used to increase the white brightness of numerous items, is valued at $13.2 billion annually, while Ferrari red is worth $300 million.
Thus, A colored substance that is entirely or almost entirely insoluble in water is called a pigment.
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It is not advisable to use drug S when patient has indigestion problem. Explain
It is essential to consult a healthcare professional before taking any medication when experiencing indigestion or any other health condition, to ensure that the medication is safe and effective for the patient's specific needs.
It is not advisable to use drug S when a patient has indigestion problem because drug S may worsen the patient's condition or interact negatively with other medications they are taking. Indigestion is a common condition that occurs when there is an imbalance in the digestive system, causing discomfort, bloating, and nausea. Some drugs can exacerbate these symptoms by increasing the production of stomach acid or by irritating the lining of the digestive tract. Drug S may have side effects that include gastrointestinal disturbances, including stomach pain, nausea, and diarrhea. This can make indigestion symptoms worse and lead to further discomfort and distress for the patient. Additionally, drug S may interact negatively with other medications that the patient is taking, further worsening their indigestion. Therefore, it is essential to consult a healthcare professional before taking any medication when experiencing indigestion or any other health condition, to ensure that the medication is safe and effective for the patient's specific needs.
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which force helps keep earth in its orbit around the sun
The force that helps keep the Earth in its orbit around the Sun is the gravitational force.
The Sun has a massive gravitational pull due to its large mass, which causes the Earth to be attracted towards it. This force of attraction is what keeps the Earth in its stable orbit around the Sun.
The gravitational force between the Sun and the Earth is balanced by the Earth's velocity and centrifugal force, which allows it to maintain a stable orbit around the Sun.
The gravitational force is the attractive force that exists between any two objects with mass. The magnitude of the gravitational force between two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them.
This means that the larger the mass of the objects and the closer they are to each other, the stronger the gravitational force between them.
In the case of the Earth and the Sun, the Sun is much more massive than the Earth, which means it exerts a much stronger gravitational force on the Earth. The Earth is constantly falling towards the Sun due to the force of gravity.
However, the Earth also has a tangential velocity that keeps it moving in a circular orbit around the Sun. This is known as centrifugal force, which is the force that acts on an object moving in a circular path, pulling it away from the center of the circle.
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8) If I have 11.9 moles of gas held at a pressure of 15 atm and in a container with a
volume of 50 liters, what is the temperature of the gas?
The general gas equation, commonly referred to as the ideal gas law, represents the state of a fictitious ideal gas through an equation. Despite its numerous drawbacks, the ideal gas law provides a decent approximation of the behaviour of many gases in a variety of situations.
The combination of Boyle's law, Charles's law and Avogadro's law results in the formation Ideal gas law and the ideal gas equation is given as:
PV = nRT
T = PV / nR
15 × 50 / 11.9 × 0.0821 = 767.7 K
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PLEASE HELP!!!
2C₂H6 (g) + 702 (g) —> 4CO2 (g) + 6H₂O(g)
If 10.0 liters of ethane gas are used, how many liters of oxygen gas will be
needed for the above reaction at STP?
A: 35.0 liters
B: 2.85 liters
C: 70.0 liters
D: 1.4 liters
The volume (in liters) of oxygen gas, O₂ that will be needed for the above reaction at STP is 35 liters (option A)
How do i determine the volume of oxygen gas needed?The volume of oxygen gas needed for the reaction can be obtain as shown below:
Balanced equation:
2C₂H₆(g) + 7O₂(g) —> 4CO₂(g) + 6H₂O(g)
From the question given above, we were told that the reaction occur at standard temperature and pressure, STP. Thus we can obtain the volume of oxygen needed as follow::
2 liters of C₂H₂ reacted with 7 liters of O₂
Therefore
10 liters of C₂H₂ will react = (10 liters × 7 liters) / 2 liters = 35 liters of O₂
Thus, we can conclude that the volume of oxygen gas needed for the reaction is 35 liters (option A)
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A 28.3 mL sample of a solution of RbOH is
meutralized by 21.91 mL of a 1.205 M solution
of HBr. What is the molarity of the RbOH
solution?
Answer in units of M.
LO
*
17 * I
a
*
C
To answer this question, we need to know the concentration of the RbOH solution. Without this information, we cannot determine the amount of RbOH present in the 28.3 mL sample.
However, if we assume that the concentration of the RbOH solution is known, we can use the formula:
moles of solute = concentration x volume
To find the number of moles of RbOH in the 28.3 mL sample. From there, we can use the molar mass of RbOH (102.47 g/mol) to calculate the mass of RbOH in the sample.
For example, if the concentration of the RbOH solution is 0.1 M, then:
moles of RbOH = 0.1 M x 0.0283 L = 0.00283 moles
mass of RbOH = 0.00283 moles x 102.47 g/mol = 0.290 g
So, a 28.3 mL sample of a 0.1 M RbOH solution would contain 0.290 g of RbOH.
In summary, the amount of RbOH present in a 28.3 mL sample of a solution depends on the concentration of the solution. Without knowing the concentration, we cannot determine the amount of RbOH in the sample.
complete question not found in the search engine.
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What might have been the advantages and disadvantages of just having
experienced polar explorers at the catlin arctic survey.
While having experienced polar explorers at the Catlin Arctic Survey would have been beneficial in many ways, it would also have been important for them to work collaboratively with the rest of the team.
Advantages:
Experienced polar explorers would have had a wealth of knowledge and skills, such as how to travel over the ice, how to set up camp, and how to handle emergencies.
Experienced polar explorers would have been able to make informed decisions about the best routes to take and the most efficient ways to travel. This could have helped to save time and energy.
Disadvantages:
Experienced polar explorers may have been set in their ways and resistant to new ideas. This could have hindered the team's ability to adapt to changing circumstances and make the most of new opportunities.
Experienced polar explorers may have been overconfident and taken risks that the rest of the team was not comfortable with. This could have put everyone's safety at risk.
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chemicals in the ___ contribute to erosion
Chemicals in the water contribute to erosion.
Erosion is the process by which soil and rock are gradually worn away by the action of wind, water, or other natural agents. Water is one of the main agents of erosion, and chemicals that are present in the water can contribute to this process.
Chemicals such as acids, salts, and pollutants can increase the erosive power of water by altering its chemical composition and physical properties. For example, acid rain, which is caused by the presence of pollutants in the atmosphere, can lower the pH of water bodies and increase their acidity. This can dissolve minerals in rocks and soil, leading to erosion.
Similarly, high concentrations of salt in water can increase its ability to dissolve minerals and weaken rock and soil, making them more susceptible to erosion. Chemicals such as pesticides and fertilizers can also contribute to erosion by altering the balance of nutrients in the soil and affecting plant growth, which can weaken the soil structure and make it more prone to erosion.
Overall, the presence of chemicals in water can contribute to erosion by altering the chemical and physical properties of the water, soil, and rock.
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Before an experiment, a scientist obtains 2.45 L of 1.25 M sulfuric acid (H₂SO4) and
dilutes it until the molarity drops to 0.80 M. What is the volume of the new solution?
The volume of the new solution, given that 2.45 L of the initial solution was diluted to 0.80 M is 3.83 L
How do i determine the volume of the new solution?The following data were obtained from the above question:
Volume of stock solution needed (V₁) = 2.45 LMolarity of stock solution (M₁) = 1.25 MMolarity of new solution (M₂) = 0.80 MVolume of new solution (V₂) = ?Dilution formula states as follow:
M₁V₁ = M₂V₂
Inputting the given parameters, we have:
1.25 × 2.45 = 0.8 × V₂
3.0625 = 0.8 × V₂
Divide both sides by 0.8
V₁ = 3.0625 / 0.8
V₂ = 3.83 L
Thus, we can conclude that the volume of the new solution is 3.83 L
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How do I find the radius of a cylinder that is is 2 cm long with a mass of 12.4g?
Explanation:
It is not possible to find the radius of a cylinder with only its length and mass. Additional information, such as the density or volume of the cylinder, would be needed.
Mole mass Conversions - using molar mass of each substance, convert the following quantities into grams:
1. ) 10.0 mol Cr
2. ) 2.40 mol N2
3. ) 4.52 x 10^-5 mol C2H4
1. 10.0 mol of Cr weighs 520.0 grams.
2. 2.40 mol of N2 weighs 67.25 grams.
3. 4.52 x 10^-5 mol of C2H4 weighs 0.00127 grams.
To convert quantities given in moles into grams, we need to use the molar mass of the substance. The molar mass is the mass of one mole of the substance, and it is expressed in grams per mole (g/mol).
1.) To convert 10.0 mol Cr into grams, we need to know the molar mass of Cr. The molar mass of Cr is 52.00 g/mol. Therefore:
10.0 mol Cr x 52.00 g/mol Cr = 520.0 g Cr
So 10.0 mol of Cr weighs 520.0 grams.
2.) To convert 2.40 mol N2 into grams, we need to know the molar mass of N2. The molar mass of N2 is 28.02 g/mol. Therefore:
2.40 mol N2 x 28.02 g/mol N2 = 67.25 g N2
So 2.40 mol of N2 weighs 67.25 grams.
3.) To convert 4.52 x 10^-5 mol C2H4 into grams, we need to know the molar mass of C2H4. The molar mass of C2H4 is 28.05 g/mol. Therefore:
4.52 x 10^-5 mol C2H4 x 28.05 g/mol C2H4 = 0.00127 g C2H4
So 4.52 x 10^-5 mol of C2H4 weighs 0.00127 grams.
In conclusion, to convert moles into grams, we need to use the molar mass of the substance. We multiply the number of moles by the molar mass to obtain the mass in grams. It is essential to use the correct units and pay attention to significant figures to get accurate results.
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What is the change in enthalpy when 90.6 g
of steam at 100◦C is converted to liquid water
at the same temperature and pressure? The
heat of vaporization of water is 40.7 kJ/mole.
The change in enthalpy when 90.6 g of steam at 100◦C is converted to liquid water at the same temperature and pressure is 204.7 KJ
How do i determine the change in enthalpy?First, we shall obtain the number of mole water converted to steam. details below:
Mass of water = 90.6 grams Molar mass of water = 18 g/mol Mole of water =?Mole = mass / molar mass
Mole of water = 90.6 / 18
Mole of water = 5.03 moles
Finally, we shall determine the change in enthalpy. Details below:
Mole of water (n) = 5.03 molesHeat of vaporization (ΔHv) = 40.7 KJ/molChange in enthalpy (ΔH) =?ΔH = n × ΔHv
ΔH = 5.03 × 40.7
ΔH = 204.7 KJ
Thus, we can conclude that the change in enthalpy is 204.7 KJ
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