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Chemistry

04/26/23

Zn(OH)42- + As -> Zn + H2ASO- basic solution

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Chemistry Biochemistry Organic Chemistry Chemical Engineering

04/26/23

The most common ion for lead has a charge of 4+. What element in the same period as lead has a larger ionic radius?

The most common ion for lead has a charge of 4+. What element in the same period as lead has a larger ionic radius? hafnium rhenium thallium tungsten none of the above

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Chemistry

04/26/23

Stuck on chemistry problem due tonight

How many grams of oxygen are required to produce 70 kJ of heat during melting? The heat of fusion of oxygen is 0.44 kJ /mole. Round to a whole number

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Chemistry

04/26/23

Stuck on chemistry problem due tonight

How many joules are required to melt 48 grams of Ammonia (NH3)? The heat of fusion of ammonia is 5.66kJ / m * ole Round to the appropriate amount of significant figures

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Chemistry Math Science Calculus

04/25/23

static equilibrium

A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 300 N and is 4.50 m long. What is the tension in each rope when the 600-N worker stands 1.30... more

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Chemistry Math Biology Calculus

04/25/23

Static Equilibrium Question; Please Help.

A person is standing on a diving board that is supported by two springs, one at each end. The diving board weighs 200 N and is 2.0 m long. What is the force exerted by each spring when a 500-N... more

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Chemistry

04/25/23

The reaction A + 2B + C → Products has a rate law of Rate = k[A]²[B]. By what factor would the reaction rate change if [A] is tripled?

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Chemistry

04/25/23

Chemistry 11 grade

What is pH of 2.2x 10^-3 M of NaOH ? What is pOH of 3.6 x10^-4M of H2SO4 ? What is pH of 2.98 x10^-2M of HCl ?Whay is pOH a 6.97 x 10^-5 M of KOH ?

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Chemistry

04/25/23

Gibbs Free Energy

The ∆G° of vaporization for benzene at 298 K and 1.00 atm is 4.883 kJ/mol. Calculate the pressure, in atm, of benzene vapor in equilibrium with benzene liquid at 298 K.

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Chemistry

04/25/23

Gibbs Free Energy

What is ∆G° for the reaction CaO(s) + CO₂(g) → CaCO₃(s)? (kJ/mol)CaO = ∆G°f = -604 (kJ/mol)CO₂ = ∆G°f = -394.4 (kJ/mol)CaCO₃ = ∆G°f = -112.8 (kJ/mol)

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Chemistry

04/25/23

Solution Concentration

(1)To make 1 liter of a 0.47 molar solution of sodium nitrate,NaNO^3, you add 0.47 moles to a volumetric flask. How many grams of NaNO^3 should you add? How much water should you add?(2)To make... more

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Chemistry

04/25/23

Normality of acids is also related to equivalents, comparing an acid's potential proton donating to a monoprotic strong acid. What is the Normality of 5M H2S?

CRB Normality of acids is also related to equivalents, comparing an acid's potential proton donating to a monoprotic strong acid. What is the Normality of 5M H2S?(A) 5 N(B) 2.5 N(C) 10 N(D) 15 N

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Chemistry

04/25/23

You have 8.32 g of P4(s) and 3.22 g of Cl2. Considering the following unbalanced equation, how much PCl3 will be produced: P4 + Cl2 -> PCl3

You have 8.32 g of P4(s) and 3.22 g of Cl2. Considering the following unbalanced equation, how much PCl3 will be produced: P4 + Cl2 -> PCl3(A) 4.12 g(B) 1.82 g(C) 0.27 g(D) 15.78 g

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Chemistry

04/25/23

How many grams of Magnesium would need to be used to donate as many electrons as 50g of Sodium (

CRB Equivalents are related to limiting reagents, because using a different compound means a different mass needs to be used to have the same effect (whether in buffering, electrons to donate or... more

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Chemistry

04/25/23

Chem- periodicity and ionic bonds

Consider an ionic compound, MX2, composed of generic metal M and generic, gaseous halogen X.The enthalpy of formation of MX2 is Δ𝐻∘f=−987 kJ/mol. The enthalpy of sublimation... more

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Chemistry

04/24/23

Don’t know how to solve this

1) A tank of Bromine gas occupies 15 L at a pressure of 160 kPa at 25 deg C. How many grams of Bromine are in the tank?

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Chemistry

04/24/23

Stuck on how to solve this

20) What is the volume of a 1.50 M solution if it contains 55 g of ammonium chloride?

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Chemistry

04/24/23

Stuck on chemistry problem

A weather balloon has a maximum volume of 750 L. The balloon contains 250 L of helium gas at a pressure of 0.975 atmWhat will be the pressure when the balloon is at maximum volume? What are the 4... more

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Chemistry

04/24/23

Step by step chemistry

1) A tank of Bromine gas occupies 15 L at a pressure of 160 kPa at 25 deg C. How many grams of Bromine are in the tank?

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Chemistry

04/24/23

Stuck on chemistry problem step by step

1.00 L of a solution is prepared by dissolving 125.6 g of Naf in it. If took 180 mL of that solution and diluted it to 500 mL, determine the molarity of the resulting solution

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Chemistry

04/24/23

What is the pH of a solution of 0.300 M HNO₂ containing 0.120 M NaNO₂? (Ka of HNO₂ is 4.5 × 10⁻⁴)

Note the presence of an acid and a salt of its conjugate base in the solution. To solve this problem, you will need to plug the appropriate pKa value into the Henderson-Hasselbalch equation.

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Chemistry

04/24/23

Stuck on chemistry problem

1.00 L of a solution is prepared by dissolving 125.6 g of Naf in it. If took 180 mL of that solution and diluted it to 500 mL, determine the molarity of the resulting solution.

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Chemistry

04/24/23

At 1 atm, how much energy is required to heat 87.0 g H2O(s) at −24.0 ∘C to H2O(g) at 143.0 ∘C?

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Chemistry

04/24/23

Intro To Chemistry

You have 3 moles of C2H6O. How many moles of carbon are in 3 mol of C2H6O? moles How many moles of hydrogen are in 3 mol of C2H6O? moles How many moles of oxygen are in 3 mol of C2H6O? moles more

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Chemistry

04/24/23

A 0.0580 M solution of an organic acid has an [H+] of 1.20×10-3 M .

Using the values above, calculate the pH of the solution. = pH Part 2 (0.3 point) What is the percent ionization of the acid? % ionization Part 3 (0.3 point) Calculate the... more

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Zn(OH)42- + As -> Zn + H2ASO- basic solution

The most common ion for lead has a charge of 4+. What element in the same period as lead has a larger ionic radius?

Stuck on chemistry problem due tonight

Stuck on chemistry problem due tonight

static equilibrium

Static Equilibrium Question; Please Help.

The reaction A + 2B + C → Products has a rate law of Rate = k[A]²[B]. By what factor would the reaction rate change if [A] is tripled?

Chemistry 11 grade

Gibbs Free Energy

Gibbs Free Energy

Solution Concentration

Normality of acids is also related to equivalents, comparing an acid's potential proton donating to a monoprotic strong acid. What is the Normality of 5M H2S?

You have 8.32 g of P4(s) and 3.22 g of Cl2. Considering the following unbalanced equation, how much PCl3 will be produced: P4 + Cl2 -> PCl3

How many grams of Magnesium would need to be used to donate as many electrons as 50g of Sodium (

Chem- periodicity and ionic bonds

Don’t know how to solve this

Stuck on how to solve this

Stuck on chemistry problem

Step by step chemistry

Stuck on chemistry problem step by step

What is the pH of a solution of 0.300 M HNO₂ containing 0.120 M NaNO₂? (Ka of HNO₂ is 4.5 × 10⁻⁴)

Stuck on chemistry problem

At 1 atm, how much energy is required to heat 87.0 g H2O(s) at −24.0 ∘C to H2O(g) at 143.0 ∘C?

Intro To Chemistry

A 0.0580 M solution of an organic acid has an [H+] of 1.20×10-3 M .

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