Using the formula m1v1=m2v2 , you have a 0.5 m mgso4 stock solution available.
calculate the volume of the stock solution needed to make 2.0 l of 0.20m mgso4.
0.5 l
04.0l
0.9 l
kid 0.8 l
Answers
We need 0.4 L of the 0.5 M MgSO₄ stock solution to make 2.0 L of 0.20 M MgSO₄.
To calculate the volume of the 0.5 M MgSO₄ stock solution needed to make 2.0 L of 0.20 M MgSO₄, we will use the formula m₁v₁ = m₂v₂.
1. Identify the given values:
m₁ = 0.5 M (concentration of the stock solution)
m₂ = 0.20 M (concentration of the desired solution)
v₂= 2.0 L (volume of the desired solution)
2. Plug the given values into the formula:
(0.5 M)(v₁) = (0.20 M)(2.0 L)
3. Solve for v1 (volume of the stock solution needed):
v₁= (0.20 M)(2.0 L) / (0.5 M)
v₁= 0.4 L
So, you need 0.4 L of the 0.5 M MgSO₄ stock solution to make 2.0 L of 0.20 M MgSO₄.
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Related Questions
When pressure-volume measurements are made on 1.0 mol of gas at constant temperature, a plot V versus P results in a ?a.hyperbola. b.parabola. c.sine curve. d.straight line.
Answers
When pressure-volume measurements are made on 1.0 mol of gas at constant temperature, the resulting plot is a. hyperbola. This is due to Boyle's law.
In the study of gases, pressure and volume are two fundamental properties that are often measured and analyzed together. When studying the relationship between pressure and volume for a fixed amount of gas at a constant temperature, different types of plots can be obtained. When pressure-volume measurements are made on 1.0 mol of gas at constant temperature, the resulting plot of volume (V) versus pressure (P) is a hyperbola. This is known as Boyle's law, which states that at constant temperature, the product of the pressure and volume of a gas is constant. Mathematically, this can be expressed as PV = constant.
When this relationship is graphed, we obtain a hyperbolic curve that shows that as the pressure on the gas increases, its volume decreases and vice versa. This relationship can be explained by the behavior of gas molecules. When the pressure on a gas is increased, the molecules are forced closer together, which reduces the volume of the gas. Conversely, when the pressure is decreased, the molecules have more space to move around, which increases the volume.
In contrast, a parabolic plot would result from pressure-volume measurements on a gas that obeys Charles's law, which states that at constant pressure, the volume of a gas is directly proportional to its temperature. A sine curve would result from pressure-volume measurements on a gas that obeys the ideal gas law, which takes into account the number of moles of gas and the absolute temperature. Finally, a straight line plot would result from pressure-volume measurements on a solid or liquid, which are virtually incompressible.
In conclusion, when pressure-volume measurements are made on 1.0 mol of gas at constant temperature, the resulting plot is hyperbola. This is due to Boyle's law, which states that at constant temperature, the product of the pressure and volume of a gas is constant. Understanding the relationship between pressure and volume is crucial for the study of gases and their behavior under different conditions. So the correct option is a. hyperbola.
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What are the differences between sand and potting soil? Are they both mixtures? How do you know?
Answers
Both sand and potting soil are mixtures because they both contains more than one type of substances. Both are composed of minerals and different substrates.
What are mixtures ?Mixtures are substance formed by the combination of two or more components. The mixtures can be homogenous or heterogenous. Homogenous mixtures contains only one phase.
Heterogenous mixtures are of components with different phases. Sand is an example of heterogenous mixture. The major component of sand is silicon dioxide. it also contains grains of other minerals.
Potting soil is a mix of soil and minerals used for plantation. It also known as potting compost since it contains wood products, vermiculates, clay etc. Therefore, potting soil is a mixture.
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experiments also show that any aqueous solution at 25 degree celsius, the ionic-product of water Kw is equal to a constant value:
Answers
In any aqueous solution at 25°C, the ionic-product of water (Kw) is a constant value equal to 1.0 x 10⁻¹⁴ mol²/L².
Due to the auto-ionization or self-ionization of water, water molecules dissociate into hydronium ions (H₃O⁺) and hydroxide ions (OH⁻). At 25°C, the Kw is equal to 1.0 x 10⁻¹⁴ mol²/L².
This constant value of Kw plays a crucial role in understanding the acidity and basicity of aqueous solutions. It helps to establish the relationship between the concentrations of hydronium and hydroxide ions, as their product remains constant at a given temperature. The pH and pOH scales are derived from this relationship, providing a convenient method for measuring the acidity or basicity of a solution.
In summary, the ionic-product of water, Kw, remains constant at 1.0 x 10⁻¹⁴ mol²/L² for any aqueous solution at 25°C. This constant is a result of the auto-ionization of water and helps to understand the relationship between hydronium and hydroxide ions in the context of acidity and basicity.
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Which of the following statements is not true for Coulomb's law?
A.
The force will decrease if the distance is decreased.
B.
The electric force depends partly on the amount of charge.
C.
Doubling one of the charges will double the force if the distance remains constant.
D.
The electric force depends on both amount of charge and distance between them.
Answers
Answer:
A
Explanation:
just took the test
The following statements is not true for Coulomb's law is:
A. The force will decrease if the distance is decreased.
Coulomb's law describes the electrostatic force between two point charges. The law states that the force between two charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them.
Mathematically, Coulomb's law is expressed as:
F = k * (|q1| * |q2|) / r²
Where:
F is the electrostatic force between the two charges q1 and q2.
k is Coulomb's constant, a proportionality constant with a value of approximately 8.99 x 10⁹ N m²/C² in a vacuum.
|q1| and |q2| are the magnitudes (absolute values) of the two charges.
r is the distance between the two charges.
Now let's analyze statement A:
A. The force will decrease if the distance is decreased.
This statement is incorrect. According to Coulomb's law, as the distance (r) between the two charges decreases, the force (F) between them increases. The force is inversely proportional to the square of the distance (r²). As the distance becomes smaller, the denominator of the Coulomb's law expression (r²) decreases, causing the force to increase.
Conversely, if the distance between the charges increases, the force between them decreases. The force decreases with the square of the distance.
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What do animals mean to you?
A)Lovable fur friends
B)Speacial to you
C)They are just animals
D)Who cares
Answers
Answer: OMG EMMM, PLZ ANSWER ME, I REALLY MISS U , plz come back...
Explanation:
Fish need 5 ppm of dissolved oxygen in water to survive. Will water with a dissolved oxygen concentration of 0.0047 mL in 1 litre sustain fish? (1 L = 1000 mL)
Answers
The fish would not survive because the amount of the oxygen corresponds only to 0.0047ppm.
What is the amount of the oxygen required?We know that the ppm is one of the units that can be used to measure the concentration. Note that the ppm is the acronymn that stands for parts per million.
In this case, we have to note that the parts per million that we talking about in the problem that we have here is actually mL or oxygen per mL of water. We can see that in the case that we have, the amount of the oxygen is 0.0047 mL in 1L of water which is less than the threshold amount required.
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A jug contains 2L of milk. Calculate the volume of the milk in m3
Answers
Answer: 0.002 m³
Explanation:
We can use our unit conversions to find the volume in m³.
\(2L*\frac{1m^3}{1000L} =0.002m^3\)
How do countries with different currencies trade goods with each other?
A.
They trade actual physical products to avoid confusion over currency differences.
B.
They negotiate to determine which country's currency will be used for the whole exchange.
C.
They create a new shared currency, such as the European Union countries' euro.
D.
They use the exchange rate to convert one country's currency to another's.
Answers
Answer:
D- They use the exchange rate to convert one's Country's currency to another's
Explanation:
How much time does it take for physical weathering to change a rock? (2 points)
a
Days
b
Months
c
Weeks
d
Years
mean
Answers
Answer:
d. Years
Explanation:
Weathering takes millions and millions of years.
Weathering goes super slowly that’s why we don’t see it
Consider this reaction: Upper K Upper O Upper H + Upper H Upper B 4 right arrow Upper K Upper B r + Upper H Subscript 2 Baseline Upper O
Which is the acid in this reaction?
KOH
HBr
KBr
H2O
Answers
Answer:
HBr
Explanation:
Calculate the amount of heat needed to convert 230.0 g of ice at -10.0ºC to liquid water at 10.0ºC.
Answers
The heat required to raise the temperature of ice from -10.0ºC to 10.0ºC is 22.2 KJ.
The heat needed to convert 230.0 g of ice at -10.0ºC to liquid water at 10.0ºC is the sum of the latent heat of fusion of ice and the heat required to raise the temperature of the resulting water to.
Hence, the heat required is obtained from;
H = Heat required to raise the temperature from -10.0ºC to 0ºC + Heat required to convert ice to water + Heat required to raise the temperature of water from 0ºC to 10.0ºC
H =[0.23 × 2090 × (0 - (-10.0))] + [0.23 × 33600] + [0.23 × 4186 × ( 10 - 0)]
H = 4807 + 7728 + 9627.8
H = 22.2 KJ
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.A person is unable to see distinctly the objects placed at large distances but is able to read a book comfortably. Name the defect of vision he is suffering from
Answers
Answer:
The defect of vision suffered by the person is Myopia
Explanation:
The person can't see farther objects but is able to read a book which is placed closely to the eyes, using these observations the person is suffering from MYOPIA(nearsightedness) in which observer see close objects clearly but farther objects appear blurred.
The light entering the eye isn't correctly bent, the eyeball becomes big , or the eye lens become too converging, which converges the light ray in front of the cornea
This defect can be cured by using concave lenses.
The Liquified Petroleum Gas (LPG) has the composition of 60% Propane (C 3
H 8
) and 40% Butane (C 4
H 10
) by volume: (a) Find the wet volumetric and gravimetric analysis of the products of combustion when the equivalence ratio (Φ)=1.0. (b) What is the stoichiometric air to fuel ratio for the LPG.
Answers
The balanced combustion reaction for propane can be represented as:
C₃H₈ + (5/2)O₂ → 3CO₂ + 4H₂O
And the balanced combustion reaction for butane can be represented as:
C₄H₁₀ + (6.5)O₂ → 4CO₂ + 5H₂O
Since LPG is composed of 60% propane and 40% butane by volume, we can calculate the wet volumetric and gravimetric analysis based on these proportions.
Wet volumetric analysis:
For the wet volumetric analysis, we consider the volume of the products of combustion relative to the volume of the LPG consumed.
Propane (C₃H₈):
The stoichiometric coefficient of propane in the combustion reaction is 3. Therefore, for every mole of propane burned, we will have 3 moles of CO₂ and 4 moles of H₂O formed.
Butane (C₄H₁₀):
The stoichiometric coefficient of butane in the combustion reaction is 4. Therefore, for every mole of butane burned, we will have 4 moles of CO₂ and 5 moles of H₂O formed.
Considering the initial composition of 60% propane and 40% butane by volume, we can calculate the volumetric composition of the products of combustion:
Volumetric composition of CO₂:
(0.6 * 3) + (0.4 * 4) = 3.6
Volumetric composition of H₂O:
(0.6 * 4) + (0.4 * 5) = 4.6
Therefore, the wet volumetric analysis of the products of combustion is 3.6 parts CO₂ to 4.6 parts H₂O.
Wet gravimetric analysis:
For the wet gravimetric analysis, we consider the mass of the products of combustion relative to the mass of the LPG consumed.
Using the molar masses of the compounds involved in the combustion reaction:
Molar mass of CO₂ = 44 g/mol
Molar mass of H₂O = 18 g/mol
Gravimetric composition of CO₂:
(0.6 * 3 * 44 g/mol) + (0.4 * 4 * 44 g/mol) = 158.4 g
Gravimetric composition of H₂O:
(0.6 * 4 * 18 g/mol) + (0.4 * 5 * 18 g/mol) = 74.4 g
Therefore, the wet gravimetric analysis of the products of combustion is 158.4 grams CO₂ to 74.4 grams H₂O.
(b) The stoichiometric air to fuel ratio for LPG can be determined based on the balanced combustion equations for propane and butane.
For propane (C₃H₈):
C₃H₈ + (5/2)O₂ → 3CO₂ + 4H₂O
The stoichiometric coefficient for propane is 1, which means we need 5/2 moles of O₂ for every mole of propane.
For butane (C₄H₁₀):
C₄H₁₀ + (6.5)O₂ → 4CO₂ + 5H₂O
Which term is testable, a prediction, and can be supported or refuted by data?
O hypothesis
ОООО
theory
law
O publication
Answers
Answer:
Hypothesis
Explanation:
A hypothesis is a statement that proposes an explanation to an observed phenomenon that can be verified by setting up a scientific test in order for the hypothesis to become classified as correct and verified when the test data supports the hypothesis or when the data and the hypothesis are not in agreement, another hypothesis may need to be developed.
Answer:
hypothesis
got it right edg2021
10 To become positively charged, an atom must: A Galn a proton B Lose a proton C С. Galn an electron D Lose an electron }
Answers
Answer:
D: lose an electron
Explanation:
when an atom loses an electron it's positively charged and when it gain an electron it is negatively charged
A 2. 0-L balloon at room temperature (20. 0°C) is placed in a refrigerator at 3. 0°C. What is the volume of the balloon after it cools in the refrigerator?
Answers
The balloon has a 1.88 L volume after cooling in the fridge.
To solve this problem, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas:
(P₁V₁)/T₁ = (P₂V₂)/T₂
Where P is pressure, V is volume, and T is temperature. We can assume that the pressure remains constant since the balloon is open to the atmosphere. Thus, we can simplify the equation to:
(V₁)/T₁ = (V₂)/T₂
Substituting the given values, we have:
V₂ = (V₁ x T₂) / T₁
V₂ = (2.0 L x 276.15 K) / 293.15 K
V₂ = 1.88 L
Therefore, the volume of the balloon after cooling in the refrigerator is 1.88 L.
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How many molecules are there in 31.8 moles of water?
1.91 x 1025 molecules
1.91 x 1022
5.28 x 10-23 molecules
5.28x 10.25
Answers
Answer:
\(31.8\ moles = 1.91 * 10^{25}\ molecules\)
Explanation:
Given
31.8 moles of water
Required
Determine the number of molecule
In standard units: 1 molecule of water is:
\(1\ mole = 6.022 * 10^{23}\ molecules\)
Multiply both sides by 31.8
\(31.8 * 1\ mole = 31.8 * 6.022 * 10^{23}\ molecules\)
\(31.8\ moles = 31.8 * 6.022 * 10^{23}\ molecules\)
\(31.8\ moles = 191.4996 * 10^{23}\ molecules\)
Express 191.4996 as a standard form
\(31.8\ moles = 1.914996 * 10^2 * 10^{23}\ molecules\)
Apply law of indices:
\(31.8\ moles = 1.914996 * 10^{2+23}\ molecules\)
\(31.8\ moles = 1.914996 * 10^{25}\ molecules\)
Approximate:
\(31.8\ moles = 1.91 * 10^{25}\ molecules\)
the carbon signal for an ester is estimated to be 1600-1800 ppm. explain why compound (1)'s carbonyl is on the lower end of this range around 161 ppm.
Answers
Carbon signal of ester = 1600 - 1800ppm/IR
161 ppm ≈ it should in the 13C-NMR
Esters are compounds derived from oxoacids in which at least one hydroxyl group has been replaced by an alkoxy group, as in substitution reactions between carboxylic acids and alcohols. Any class of organic compounds that react with water to produce alcohols and organic or inorganic acids.
Esters derived from carboxylic acids are the most common. The term ester was introduced by German chemist Leopold Gmelin in the first half of the 19th century. A molecule or functional group is formed by the condensation of an alcohol and an acid with the concomitant loss of water. The hydrogen of the carboxyl group of acetic acid is replaced with an ethyl group.
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Which atom has the largest ionization ?
Help please !!
Answers
9. Calculate the frequency of light with a wavelength = 12 km. (kilo = 10')
Answers
True or False: Only animals can move pollen from plant to plant.
A. True
B. False
Answers
i think false because of the wind or insects
epoxy modification with poly(vinyl acetate) and poly(vinyl butyral). i.structure, thermal, and mechanical characteristics
Answers
Modifying epoxy with poly(vinyl acetate) (PVAc) and poly(vinyl butyral) (PVB) enhances flexibility, impact resistance, and adhesion properties while reducing the glass transition temperature (Tg) and thermal stability.
When epoxy is modified with poly(vinyl acetate) (PVAc) and poly(vinyl butyral) (PVB), it leads to changes in the structure, thermal properties, and mechanical characteristics of the epoxy. The addition of PVAc or PVB creates a polymer blend or composite system, where the PVAc or PVB chains disperse within the epoxy matrix. This incorporation can involve physical interactions like hydrogen bonding or chemical interactions such as crosslinking or copolymerization reactions.
The thermal behavior is affected, with the modified epoxy having a changed glass transition temperature (Tg) and reduced thermal stability due to the lower Tg and decomposition temperatures of PVAc and PVB. In terms of mechanical properties, the modified epoxy gains improved flexibility and impact resistance from PVAc or PVB, enhancing toughness.
The tensile strength, modulus, and adhesion properties may be influenced, with the specific composition, ratio, and processing conditions playing a role. Experimental testing is crucial to precisely determine the effects of these modifications on the epoxy system.
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Which of the following is an example of a chemical property of matter?
O ability to melt
O ability to freeze
Oability to react
Oability to break
ITS SCIENCE
Answers
Answer:
C: Ability to react. Sorry if its wrong!
Explanation:
An old refrigerator is rated at 500 W how many kilowatt hours of electric energy what does refrigerator use in 30 days assume the refrigerator is running 12 hours per day
Answers
The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.
To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.
Given:
Power rating of the refrigerator = 500 W
Running time per day = 12 hours
Number of days = 30
First, we need to convert the power rating from watts to kilowatts:
Power rating = 500 W / 1000 = 0.5 kW
Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:
Energy used = Power rating × Running time × Number of days
Energy used = 0.5 kW × 12 hours/day × 30 days
Energy used = 180 kWh
Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.
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(ch3)3coh draw the molecule on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars. Online
Answers
This molecule is called tert-butyl alcohol, also known as tert-butanol and 2-methyl-2-propanol (IUPAC nomenclature).
All carbon atoms are \(sp^{3}\) hybridized. The oxygen atom has the same hybridization, with two of the orbitals being taken by the nonbonding electron pairs, and two by the C-O and the O-H bond.
Tert-butanol is a commonly used polar organic solvent, with a boiling point of 83 degrees Celsius and a density of 0.775 g/mL. Because it has an unusually high freezing point (26 degrees Celsius), pure tert-butanol is often solid at room temperature.
It is colorless, but has a characteristic camphorous smell, and is very miscible with water (dry tert-butanol is usually obtained through distillation over potassium or sodium).
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A beaker and the sample it contains have a mass of 67. 832 g. If the
beaker has a mass of 32. 331 g, what is the mass of the sample?
Answers
A beaker and the sample it contains have a mass of 67. 832 g. If the
beaker has a mass of 32. 331 g, the mass of the sample will be 35.501 g
What does a substance's mass mean?A material's mass is a measurement of how much matter is contained in that substance.
A balance is used to calculate the mass of a substance. By comparing the masses of two substances that contain an unknown amount of a specific ingredient, the unknown mass can be determined.
For instance, the following formula is used to determine the mass of a given substance sample:
Sample weight plus beaker weight = 75.652 g.
74.8 g is the weight of the beaker alone.
Sample mass is calculated as sample mass plus beaker mass minus beaker mass alone.
Sample mass: 67. 832 g - 32. 331 g = 35.501 g
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Suppose you have 100.00mL of a solution of a dye and transfer 2.00mL of the solution to a 100.00 -mL volumetric flask. After adding water to the 100.00mL mark, you take 5.00mL of that solution and again dilute to 100.00 mL. If you find the dye concentration in the final diluted sample is 0.000158M, what was the dye concentration in the original solution?
Answers
The dye concentration in the original solution can be calculated using the following equation:
C1V1 = C2V2
Where:
C1 = Initial dye concentration V1 = Initial volume (100.00 mL) C2 = Final dye concentration (0.000158 M) V2 = Final volume (100.00 mL)
Therefore, C1 = 0.000158 x 100.00/2.00 = 0.0079 M.
So, the dye concentration in the original solution was 0.0079 M.
It is important to note that when diluting a solution, the number of moles of solute (the substance being dissolved) remains constant. This means that the amount of solute in the initial solution is equal to the amount of solute in the final diluted solution, which is why the equation works in the way it does.
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How does an emerging idea differ from scientific consensus? Which best describes emerging scientific ideas?
Answers
Emerging scientific ideas are new theories or ideas that are gaining attention in the scientific community, but have not yet been fully accepted or confirmed.
Emerging ideas refer to the new and innovative ideas or theories that have yet to gain full scientific acceptance. While a scientific consensus is a view or theory that has been universally accepted and confirmed by multiple experiments or research, an emerging scientific idea is a new and unproven theory or idea that is gaining attention in the scientific community. These emerging ideas may also be referred to as scientific hypotheses. In contrast to scientific consensus, emerging scientific ideas have not yet been subjected to rigorous testing and confirmation.
They are generally proposed to explain new observations or experimental results, which have not yet been fully understood or explained by established scientific theories. Emerging scientific ideas can have the potential to challenge the current scientific consensus. If an emerging scientific idea is found to be valid, it can ultimately lead to the establishment of a new scientific consensus. For example, the emerging scientific idea of the Higgs boson particle led to the discovery of a new field in particle physics, which is now an established scientific consensus.
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Aluminum has a density of 2.70 g/cm 3 . Boron has a density of 2.08 g/cm 3 . Predict the density of gallium. Explain your answer.
Answers
Answer:
dohsf approval all or pow
Explanation:
What is the charge of an atom with 21 protons and 20 electrons?