Answer:
= 0.366 M
Explanation:
data;
moles = 0.381 moles
volume = 1039ml
= 1039 / 1000
= 1.039dm^3
molarity = ?
solution
molarity = [tex]\frac{moles}{volume in dm^3}[/tex]
= 0.381 / 1.039
molarity = 0.366 M
50 POINTS PLEASE ANSWER QUICK (bad answers will be reported)
Donna is studying phase changes. She claims that since the three phases have different amounts of energy, molecules in substances gain or lose energy only during phase transitions. What is incorrect about this claim?
Molecules gain or lose energy during any temperature change, not just phase changes.
Molecules do not have any energy changes, because they have a set amount of energy all the time.
Molecules are constantly losing energy, no matter what phase change is happening.
Energy levels are not related to phase changes.
Answer: Molecules gain or lose energy during any temperature change, not just phase changes.
Explanation:
If you think of a heating or cooling curve, even when there isn't a phase change, the kinetic energy of the particles is still changing.
how to solve this? what is the calculation of 100ml of 0.1 N H2SO4 by diluting from original H2SO4.
Atomic mass of: O=16 , H=1 S=32
d H2SO4=1.08 purity%=98
I need the solution and I will give a 5 star and brainliest
The answer is 0.46 ml of the original H₂S0₄ and dilute to a final volume of 100 ml.
What is Normality ?Normality is a measure of concentration equal to the gram equivalent weight per liter of solution.
Normality = Number of gram equivalents × [volume of solution in litres]⁻¹
Preparing 100. ml of 0.1 N H₂S0₄
Eq. wt. of H₂S0₄ = 98/2=49
density of H₂S0₄= 1.08
Purity =98%
1 N H₂S0₄ = 49 gH₂S0₄ / liter
1 gm equiv wt /L x 1 gm equiv. wt / 2 = 98 / 2 = 49 g)
0.1 N H2SO4 = 4.9 g / L
To make 100 ml (0.100 L) we would need 4.9 [tex]\rm \frac{g}{L}[/tex] x 0.1 L
= 0.49 g H₂S0₄/100ml
Original density = 1.08 g / ml
with a purity of 98%,
this converts to 1.08 g x 0.98 = 1.058 g /ml
0.49 g H₂S0₄ x 1 ml / 1.058 g = 0.46 ml of original H₂S0₄needed
Therefore to make the desired solution
Take 0.46 ml of the original H₂S0₄ and dilute to a final volume of 100 ml.
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The temperature of 2,000.0 g water is raised 3.00°C. How much
energy is transferred to the water. Use the formula below and use your
notes. The specific heat (Cp) for water is 4.18 J/g • °C. Round to three
significant digits. See your notes and slides.
Answer:
25 080 j ( Rounded to 25100 j)
Explanation:
FROM THE EQUATION
?? = 4.18 * 2000 * (3) = 25 080 j
A truck tire at 82.0L at 32.5°C and 1.9 atm has a temperature change to-15.4°C and a pressure change to 770.0 mmHg. Calculate how much the volume of the
air in the tire will change.
Answer:
+ 47.68 Liter change in volume to final volume 129.68 L
Explanation:
P1V1/T1 = P2V2/T2 RE-ARRANGE TO:
P1V1/T1 * T2/P2 = V2 (T must be in Kelvin)
1.9 * 82 / (273.15 + 32.5) * (273.15-15.4)/ (770/760) = 129.68 L
129.68 - 82=47.68 L change
This is an impossible formula. If it were real, determine the molar mass of:
Fe1S1O5
Ammonium lauryl sulfate has a molar mass of 283.43 g/mol.
What is ammonium lauryl sulfate, and how does it work?Ammonium dodecyl sulfate is another name for it. It's in the shampoos we use on our hair. Both polar and non-polar solvents can dissolve it. It can irritate the skin at times.
Thus, the ammonium lauryl sulfate molar mass is 283.43 g/mol.
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Example of solvent extraction
Answer:
Liquid–liquid extraction
Explanation:
Please Help Me with this
Answer:
compared to sodium, silicon has a higher ionization energy meaning it takes more energy to remove electrons.
Explanation:
hope this helps
can u please give me and Brainlist
Find the formula for the hydrate
0.737 g MgSO3 and 0.763 g H2O
The required formula of hydrate is MgSO₃.6H₂O.
How do we calculate the formula of hydrate?The number of moles of water per mole of anhydrous solid (x) will be computed by dividing the number of moles of water by the number of moles of anhydrous solid (x) to find the hydrate's formula.
Moles will be calculated as:
n = W/M, where
Moles of MgSO₃ = 0.737g / 104.3g/mol = 0.007mol
Moles of H₂O = 0.763g / 18g/mol = 0.04 mol
Number of H₂O molecule = 0.04/0.007 = 5.7 = 6
So formula of hydrate is MgSO₃.6H₂O.
Hence required formula of hydrate compound is MgSO₃.6H₂O.
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please assist with answering the attached assignment
For first order plot of ln( [tex]P_{SO_{2}Cl_{2}}[/tex]) vs time will be a straight line, which shows first order reaction
What is First Order Reaction ?
A first-order reaction can be defined as a chemical reaction in which the reaction rate is linearly dependent on the concentration of only one reactant. In other words, a first-order reaction is a chemical reaction in which the rate varies based on the changes in the concentration of only one of the reactants
Every mole of SO₂Cl₂ that dissociates results in a mole of SO₂ &Cl₂
[tex]\rm P_{total}= P_{Cl_{2}\\}+ P_{SO_{2}Cl_{2}}+ P_{SO_{2}}\\\\ P_{total} = P_{o}- \beta +\beta + \beta\\\\ P_{total} = P_{o}+\beta[/tex]
For first order plot of ln( [tex]P_{SO_{2}Cl_{2}}[/tex]) vs time will be a straight line.
t(hr) [tex]P_{SO_{2}Cl_{2}}[/tex] ln([tex]P_{SO_{2}Cl_{2}}[/tex] )
0 11.07 2.404
3 7.35 1.995
6 4.88 1.585
9 3.24 1.176
12 2.15 0.765
15 1.43 0.358
β = P(total) - P(initial)
[tex]\rm P_{SO_{2}Cl_{2}}[/tex] = P₀ - β
for t= 3
β =3.72
and
[tex]\rm P_{SO_{2}Cl_{2}}[/tex] = 7.35
For first order plot of ln( [tex]P_{SO_{2}Cl_{2}}[/tex]) vs time will be a straight line, which shows first order reaction.
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Will the following compounds create solutions? Explain your answers.
Solvent Solution? Y/N Explain
Solute
Nal
H₂O
KBr
CH₂
CO₂
CF₁
LICI
CCI
NH₂
H₂O
CO₂
H₂O
The following compounds create solutions that are listed below
What is a solution ?A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.
solvent: the substance in which a solute dissolves to produce a homogeneous mixture
solute: the substance that dissolves in a solvent to produce a homogeneous mixture
1. Nal and H₂O
It will form an ionic solution .
2. KBr and CH4
It will not form a solution
3. CO₂ and CF₄
It will not form a solution
4. LiCI and CCl₄
It will not form a solution
5. NH₃ and H₂O
It will also form a solution and liberate ions of ammonium
6.CO₂ and H₂O
It will form a solution named as carbonic acid
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What happens to the pressure and the molecules inside a unicycle tire that is being pumped up?
A. The pressure decreases, and the molecules slow down.
B. The pressure increases, and the molecules collide with the tire's inner surface.
C. The pressure increases, and the molecules slow down.
D. The pressure decreases, and the molecules collide with the tire's inner surface.
Atmospheric pressure on the peak of Kilimanjaro can be as low as 0.20 atm. If the volume of an oxygen tank is 10.0L, at what pressure must the tank be filled so the gas inside would occupy a volume of 1.2 x 1043 L at this pressure?
Answer:
24 atm
Explanation:
From Boyle's Law :
P₁V₁ = P₂V₂Given values :
P₂ = 0.2 atmV₁ = 10.0 LV₂ = 1.2 x 10³ LSolving
P₁ × 10 = 0.2 × 1.2 × 10³P₁ = 0.24 x 10²P₁ = 24 atmNew volume
1.2×10⁴³So apply Boyles law
P1V1=P2V20.2(10)=P2(1.2×10⁴³)20=P2(1.2×10⁴³)P2=1.2×10⁴³/20P2=0.6×10⁴²P2=6×10⁴¹atmReactions
Predict the products for the single replacement reactions given. Check to see that the equations are
balanced.
Ca + MgCl2 →?
-
O CaCl2 + Mg
O Ca + Cl2
0 Mg + Cl2
CaCl + Mg
Answer:
answer in picture
Explanation:
The balanced chemical equation will be Ca + MgCl2 → CaCl2 + Mg.
What is balanced chemical equation?An equation that has the same quantity of atoms on both sides of the arrow would be said to represent a balanced chemical reaction.
The given equation is Ca + MgCl2 →
It is known that when Ca is reacted with magnesium chloride ( MgCl2) then it will form calcium chloride (CaCl2 ) and magnesium.
Ca + MgCl2 → CaCl2 + Mg.
It can be seen that, calcium has one atom in the reactant side and one atom in product side. On the other hand, chlorine has one atom in reactant side as well as product side.
Hence, the reaction will be balanced.
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How many pounds of manganese are in 1.261 tons of Mn2O3?
Answer:
2000pound
Explanation:
Manganese metal is produced from the manganese(III) oxide, Mn2O3, which is found in manganite, a manganese ore. The manganese is reduced from its +3 oxidation state in Mn2O3 to the zero oxidation state of the uncharged metal by reacting the Mn2O3 with a reducing agent such as aluminum or carbon. How many pounds of manganese are in 1.261 tons of Mn2O3? (1 ton = 2000 pounds)
About 40 different substances called organophosphorus compounds are registered in the United States as insecticides. They are considered less damaging to the environment than some other insecticides because they breakdown relatively rapidly in the environment. The first of these organophosphorus insecticides to be produced was tetraethyl pyrophosphate, TEPP, which is 33.11% carbon, 6.95% hydrogen, 38.59% oxygen, and 21.35% phosphorus. It has a molecular mass of 290.190.
A quantity can be converted from one unit of measurement to another while maintaining its value. There are 2522 pounds of manganese in 1.261 tons of [tex]\rm Mn_2O_3[/tex].
It is a fundamental idea that is applied in many different disciplines such as science, engineering, math and daily life. To complete a conversion, it is necessary to know the conversion factor – the numerical relationship between the two units of measurement. With the help of this factor, you are able to convert units while keeping the value constant.
To convert tons to pounds we need to know that 1 ton is equal to 2000 pounds.
Given that you have 1.261 tons of [tex]\rm Mn_2O_3[/tex], we can calculate the number of pounds as follows:
Number of pounds = 1.261 tons * 2000 pounds/ton
Number of pounds = 2522 pounds
Therefore, there are 2522 pounds of manganese in 1.261 tons of [tex]\rm Mn_2O_3[/tex].
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Use the equation to answer the following question.
2H₂ + O₂ → 2H₂O
How many grams of H₂O are produced from 64.0 g of O₂?
O A. 72.1 g
Answer:
rsghkm vumm
Explanation:
el correo de confirmación con la que se ha enviado desde correo ok recibido gracias saludos María del Ca
C. Uprooted plants dry and die. Why?
Because:
Their roots are no longer in the soil. Thus, can't absorb water and mineral ions needed for plant growth via photosynthesis.
Hope this helps!
Answer:
Yes
Explanation:
Well this is because when a plant is planted water goes from the soil, into the roots then finally distributed to other parts of the plant.
So when plants have been plucked or uprooted water no longer has access to the plant which may result to the plant being dried up and will possibly die
On the basis of its name, what is the correct structural formula for pentene? CH2=CH−CH2−CH3 CH3−CH2−CH2−CH3 CH3−CH2−CH2−CH=CH2 CH3−CH2−CH2−CH2−CH3
The answer is CH₃-CH₂-CH₂-CH=CH₂ , Option C correctly represents the structural formula for pentene .
What is Alkene ?Any hydrocarbon containing one or more double bonds.
Alkenes are generally colorless non-polar compounds, somewhat similar to alkanes but more reactive.
The first few members of the series are gases or liquids at room temperature.
Pentenes are alkenes with the chemical formula C₅H₁₀.
Each contains one double bond within its molecular structure.
CH₃-CH₂-CH₂-CH=CH₂ , Option C correctly represents the structural formula for pentene .
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pleaseeeeeeeeeeee help this is due today
The final temperature of the sample of gas is 689.65 Kelvin.
What is the relation between temperature and pressure?Relation between the temperature and pressure will be represented by the ideal gas equation PV = nRT, and for this question required equation is:
P₁/T₁ = P₂/T₂, where
P₁ & T₁ are the pressure and temperature of the initial sample.
P₂ & T₂ are the pressure and temperature of the final sample.
Pressure is in mmHg and on putting values from the question on the above equation, we get
T₂ = (810)(390.8) / (760) = 416.5 degree C = 689.65K
Hence required temperature of the sample is 689.65K.
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What is the molarity of .200 L of solution in which 2.0 moles of sodium bromide is dissolved?
Answer:
it’s 10ml
Explanation:
200/2 = 10
Define ionization energy. Describe how ionization energy impacts ionic bonding.
Answer: I can’t explain how it impacts ionic bonding but I can tell you what ionization energy is.
Explanation:
ionization energy, also called ionization potential, in chemistry and physics, the amount of energy required to remove an electron from an isolated atom or molecule.
A small bar magnet is placed in the magnet field of a larger bar magnet that position marked why in the diagram below assuming the small bar mad and it is free to rotate how would it be positioned
Answer:
See below
Explanation:
The large bar magnet is positioned with S on the Left
the small magnet will position itself similar this with N on the right S on the left (opposites attract)
Complete the chemical equations and balance them
HCl + KOH → __________ + ____________
H₃PO₄ + NaOH→__________ + ____________
H₂CO₃+ Ca(OH)₂→__________ + ____________
Answer:
KCl+H2O
Na3PO+H2O
CaCO3+H2O
Choose all the right answers.
factors produce changes in Earth's surface? You can choose multiple, giving 60 points
A. Erosion
B. Folding
C. Faulting
D. Weathering
Answer:
The answer is Erosion, Weathering,
Explanation:
These all seem to be correct but i know for a fact those two are correct.
Charle's Law
At 225 °C a gas has a
volume of 400 mL. What is
the volume of this gas at 127
°C?
Given:
Unknown:
Formula:
Solution:
Final answer:
Convert temperature to Kelvin
225°C=498K127°C=400KConvert vol to L
400mL=0.4LApply Charles law
V1T_2=V2T_10.4(400)=498V_2160=498V_2V_2=0.32L=320mLAnswer:
Given:[tex]V_{1} = \text{400.0 mL}[/tex]
[tex]T_{1} = 225.0^{\circ}\text{C + 273.15 = 498.15 K}[/tex]
[tex]T_{2} = 127.0^{\circ}\text{C + 273.15 = 400.15 K}[/tex]
Unknown:[tex]V_{2}[/tex]
Solution:[tex]\dfrac{V_{1}}{T_{1}} = \dfrac{V_{2}}{T_{2}}[/tex]
[tex]V_{2} = V_{1} \times \dfrac{T_{2}}{T_{1}}[/tex]
[tex]V_{2} = \text{400.0 mL} \times \dfrac{\text{400.15 K}}{\text{498.15 K}}[/tex]
[tex]\boxed{V_{2} = \text{321.3 mL}}[/tex]
Therefore, the volume of the gas at 127.0°C is 321.3 mL
[tex]\begin{gathered}\\\end{gathered}[/tex]
What do you predict will happen to the volume inside a container when pressure & temperature remains constant but the number of particles inside is increased? WHY?
Answer:
increase
Explanation:
The Ideal Gas Equation
PV = nRTV = nRT/PV ∝ nThe volume of a gas is directly proportional to the number of moles it contains. Hence, if the number of particles is increased, then the volume inside the container will increase
Which type of solid conducts electricity the best?
• Ionic
• Molecular
• Network
• Metallic
Make sure your answer includes TWO decimal places. this is an impossible formula. If it were real, determine the molar mass of:
KBr•7H2O
Molar mass is the summation of the atomic mass of the individual atoms. The molar mass of KBr•7H₂O is 244.99.
What is atomic mass?Atomic mass or weight is the number of protons and neutrons in the atom of the individual element. The atomic masses are used to calculate the molar mass of the compound.
The compound KBr•7H₂O: 1 K + 1 Br + 14 H + 7O
Inserting the atomic masses of the individual atoms as:
= 1 (39.09) + 1 (79.90) + 14 (1.00) + 7(16)
= 39.09 + 79.90 + 14.00 + 112
= 244.99
Therefore, 244.99 is the molar mass of KBr•7H₂O.
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A gas has a volume of 1400 mL at a temperature of 20.00 K and a pressure
of 101.3 kPa. What will be the new volume when the temperature is
changed to 40.00 K and the pressure is changed to 50.65 kPa?
The question is Given:Gas×Temperature×Pressure
Gas=1400ml
Temperature=20.00K
Pressure=101.3kpa
140ml×20.00K×101.3 K Pa
total =6,00.00
and when the volume of temperature changed to 40.00 K and the pressure is changed to 50.65 kPa.
Solution will 40.00 K× 50.65 kPa
total of the changes is 200.
formular for calculating weight
The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg. Since the weight is a force, its SI unit is the newton.
W = mg
Weight of object = mass of object × acceleration of gravity
How many grams of LiOH are needed to make 25 mL of a 0.125 M solution?
Please explain because I have no idea how to solve this
Answer:
0.0734 grams LiOH
Explanation:
The molarity formula looks like this:
Molarity (M) = moles / volume (L)
You are given the molarity and volume (in mL). Therefore, you can plug these values into the equation and solve for moles (after you convert from mL to L).
25 mL / 1,000 = 0.025 L
0.125 M = moles / 0.025 L
(0.125 M) x (0.025 L) = moles
0.003125 = moles
After using the molarity formula, we know that 0.003125 moles LiOH are needed to satisfy these conditions. Now, we can convert this to grams using the molar mass of LiOH. This can be determined using the values from the periodic table. Remember to write your conversion in a way that allows for the units to cancel out.
Molar Mass (LiOH) = 6.941 g/mol + 16.00 g/mol + 1.008 g/mol
Molar Mass (LiOH) = 23.499 g/mol
0.003125 moles 23.499 g
------------------------ x ------------------- = 0.0734 grams LiOH
1 mole
0.074 grams of lithium hydroxide are needed to make 25 ml of 0.125 M solution, according to the concept of molar concentration.
What is molar concentration?
Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.
Here , in the problem mass is to be determined, hence the formula used is the first one mentioned.
Substituting values in the formula,mass=molar concentration×molar mass×volume in liters
∴0.125×23.95×0.025=0.074 g.
Hence, 0.074 g of lithium hydroxide are required to prepare 25 ml of 0.125 M solution.
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