07/20/22

Chemical equation
If 25.0g of potassium bicarbonate, KHCO3 has undergo complete decomposition, calculate the number of moles of potassium bicarbonate, KHCO3 decomposed
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07/20/22

Find the weight of 75%pure magnesium carbonate which generates 50g magnesium oxide on heating
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07/20/22

Chemistry Question!
It takes 38 mL of 0.75 M NaOH solution to completely neutralize 155 mL of a sulfuric acid solution (H2SO4). What is the concentration of the H2SO4 solution?Please state detailed computation. Thank... more
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07/19/22

Balance the equation in basic conditions. Phases are optional. equation: SO3^-2+Co(OH)2⟶Co+SO4^-2
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07/19/22

Complete and balance the equation for this reaction in acidic solution. equation: MnO_{4}^{-} + HNO_{2} -> NO_{3}^{-} + Mn^{2 + } MnO−4+HNO2⟶NO−3+Mn2+
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07/19/22

Can I get help on this
Consider the following reaction and its Δ𝐺∘ at 25.00 °C.Mg(s)+Ni2+(aq)⟶Mg2+(aq)+Ni(s) Δ𝐺∘=−408.0 kJ/molCalculate the standard cell potential, 𝐸∘cell, for the reaction.𝐸∘cell=V?Calculate the... more
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07/18/22

chemistry equilibrium

Morphine, C17H19NO3, is a naturally occurring base that is used to control pain. A 4.5 x 10 -3 mol/L solution has a pH of 9.93. Calculate Kb for morphine.
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07/18/22

equilibrium chemistry
230 mL of 0.0015 mol/L silver nitrate is added to 130 mL of 0.010 mol/L calcium acetate. Does a precipitate form? Ksp for silver acetate is 0.0020.
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07/18/22

equilibrium chem
A chemist finds that the solubility of silver carbonate is 1.3 x 10 -4 mol/L at 25 C. Calculate the Ksp for silver carbonate.
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07/18/22

When you add a teaspoon of salt to a glass of water I took a sip and noticed that the water tastes salty what kind of change has occurred

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07/18/22

equilibrium chemistry

At T = 25°C, Kp = 171.3 for the general reaction 2A(g) + B(g) 2C(g) + 2D(g) Calculate Ke.
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07/18/22

chemistry (equilibrium)
At a certain temperature, Ke = 3 for the reaction NO3(g) NO(g) + O2(g) Find the direction of the reaction if at some point in time in a 1.0 vessel the following respective concentrations were... more
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07/18/22

I need help figuring out the standard reduction potential?
This is a series of electrochemical half-reactions and found the half-cell reduction potential for all but one, ClO2(aq) → ClO-1(aq). When you couple this half-cell to a MnO4-1(aq) → Mn+2(aq)... more
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07/17/22

Calculate the molality of a solution formed by adding 6.80 g NH4Cl to 16.5 g of water.
Ch 11 Q 12Calculate the molality of a solution formed by adding 6.80 g NH4Cl to 16.5 g of water.molality: ___𝑚 NH4Cl
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07/17/22

Multiple Questions
ch 17 q 23A certain reaction has an activation energy of 36.97 kJ/mol.36.97 kJ/mol. At what Kelvin temperature will the reaction proceed 6.506.50 times faster than it did at 357 K?ch 17 q36A... more
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07/17/22

How long, in seconds, would it take for the concentration of A to decrease from 0.820 M to 0.350 M?
The rate constant for this second‑order reaction is 0.460 M−1⋅s−10.460⁢ M−1⋅s−1 at 300 ∘C.300⁢ ∘C.A⟶productsA⟶productsHow long, in seconds, would it take for the concentration of AA to decrease... more
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07/17/22

Chemistry - Gas Stoichiometry
How many grams of a gas with a molar mass 36.02 g/mol would be required to occupy a 757 mL flask at 0.960 atm and 92.4 degrees Celcius?
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07/17/22

I need help with this problem?
For the reaction below:a PBr5(g) + b O2(g)  c P2O5(g) + d BrO2(g)Substance ΔH°f (kJ/mol) S° (J/mol*K) ΔG°f (kJ/mol)PBr5(g) -219.28 +115.19 ... more
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07/16/22

How much heat energy is required to boil 47.4 g of ammonia, NH3? The molar heat of vaporization of ammonia is 23.4 kJ/mol.
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07/16/22

Chemistry 102: Acid Equilibrium: Find Ksp for calcium hydroxide at a temperature
The solubility of an ionic compound in water can be expressed in terms of the mass that will dissolve in a given volume of water, or in terms of the solubility product, Ksp.If only 0.303 g of... more
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07/16/22

Thanks in advance to whoever is helping with this
Hydroxyapatite, Ca10(PO4)6(OH)2 , has a solubility constant of Ksp = 2.34×10−59, and dissociates according toCa10(PO4)6(OH)2(s)↽−−⇀10Ca^2+(aq)+6PO4^3−(aq)+2OH−(aq)Solid hydroxyapatite is dissolved... more
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07/16/22

Can I get help on this
In a saturated solution of cadmium carbonate at 25 °C both [Cd2+] and [CO3^2−]=1.0×10−6 M. Write an equilibrium expression for this compound.𝐾sp=Calculate the value of 𝐾sp for this compound. 𝐾sp=
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07/16/22

Chemistry - Gas Stoichiometry

A laboratory group measures an excess of a volatile liquid. They add this to an empty flask with a volume of 345 mL. They heat the sample to 88.4 degrees Celcius until all the liquid is vaporized.... more
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07/16/22

What is Ka for its conjugate acid?
You have a base with Kb = (2.779x10-3). What is Ka for its conjugate acid?
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07/16/22

What is its mass number after the beta decay?
A monoatomic atom or ion with 37 protons, 32 neutrons, and 38 electrons undergoes a beta decay. What is its mass number after the beta decay?
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