10/16/20

Write Balanced Chemical Equations for the Following (including ALL physical states)
7. Cobalt(III) bromide (aq) reacts with chlorine gas forming liquid bromine and cobalt(III) chloride (aq). 8. Silver metal reacts with sulfur powder (S8 ) to form solid silver sulfide. [S8 is a... more
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10/16/20

Write Balanced Chemical Equations for the Following (including ALL physical states)
4. Solid iron(III) oxide react with solid carbon forming iron metal and gaseous carbon dioxide. 5. Solid ammonium nitrite decomposes into nitrogen gas and liquid water. 6. Gaseous sulfur dioxide... more
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10/16/20

Write Balanced Chemical Equations for the Following (including ALL physical states)
1. Gaseous nitrogen dioxide reacts with liquid water to produce nitric acid and gaseous nitrogen monoxide. 2. Solid iodine reacts with chlorine gas to produce liquid iodine trichloride. 3. Sodium... more
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10/16/20

I need help with this chemistry question
How many moles are in 80g of NaOH?
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10/16/20

Calibration curve
Hi,I need some help with plotting a calibration curve.I have done serial dilution and I ended up with concentrations as follows:13000mg/l , 1300mg/l , 130mg/l and so forth.Now I am not sure what... more
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10/16/20

How many milliliters?
How many milliliters of 3.00 M calcium hydroxide is required to neutralize 810. mL of 1.10 M hydroiodic acid?
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10/16/20

What is the mass?
A reaction between copper(I) chloride and lead(II) nitrate was run with 7.02 g of copper(I) chloride (molar mass = 99.00 g/mol) and 15.3 g of lead(II) nitrate (molar mass = 331.22 g/mol). If the... more
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10/16/20

Why is the following a redox reaction?
C2H4 +3O2 →2CO2 + 2H2O Why is this considered a redox reaction?
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10/16/20

Coffee-Cup calorimeter? Please check my answer! :)
When a neutralization reaction is carried out in a coffee-cup calorimeter, the temperature of the solution after reaction, Tf, would beaCannot determinebLowercThe... more
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10/16/20

question has 4 parts related to solubility and dissociation
Calculate the solubility of PbCl2 in 0.75 M NaOH. The Kf of Pb(OH)3- is 8E13 and the Ksp of PbCl2 is 1.7E-5. a) Write the chemical equation and the ion product expression for the dissolution of... more
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10/16/20

Predict the temperature change?
Predict how the temperature change that you measure for 25 mL of 2 M NaOH added to 25 mL of 2 M hydrochloric acid compare to the temperature change when 25 mL of 1 M NaOH is added to 25 mL of 1 M... more
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10/16/20

Which of the following reactions will lead to the largest temperature change in the calorimeter?
Which of the following reactions will lead to the largest temperature change in the calorimeter?a25 mL of 2 M NaOH added to 20 mL of 2 M HCIb50 mL of 1 M NaOH to 25 mL of 1 M HCIc25 mL of 2 M NaOH... more
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10/16/20

how to find atoms given density

How many atoms of He can a balloon that has a 21 cm diameter hold? The density of Helium is 1.18 g/L. (Assume the balloon is a sphere).
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10/16/20

Chemistry chapter 3 homework question
Epsom salts, a strong laxative used in veterinary medicine, is a hydrate, which means that a certain number of water molecules are included in the solid structure. The formula for Epsom salts can... more
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10/16/20

What is the maximum number of electrons?
n=4, l=1, ml=0What are the maximum number of electrons?
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10/16/20

Which of the following set is an acceptable set of quantum numbers for a 4p electron?
-n = 4, l = 2, ml = 1, ms = 1-n = 4, l = 1, ml = 2, ms = −1/2-n = 4, l = 1, ml = 1, ms = −1/2-n = 5, l = 1, ml = −1, ms = −1/2-n = 4, l = 4, ml = 3, ms = +1/2
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10/16/20

Which set of quantum numbers is allowed?
Which set of quantum numbers is allowed?   n l ml ms A) 3 3 3 +1 B) 1 2 –1 +1/2 C) 2 1 2 –1/2 D) 4 0 1 +1/2 E) 4 3 –3 –1/2
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10/16/20

Considering the following five cases of hydrogen electron transitions, which one describes the emission of light with the highest frequency?
Considering the following five cases of hydrogen electron transitions, which one describes the emission of light with the highest frequency?-n = 1 to n = 2-n = 3 to n = 1-n = 3 to n = 2-n = 1 to n... more
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10/16/20

How to solve this chemical equation?
Q: You will perform a titration to determine the molar concentration of a NaOH solution.The balanced equation for the reaction is shown below: H2C2O4 + 2 NaOH → Na2C2O4 + 2 H2O How many moles of... more
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10/16/20

What is the equilibrium partial pressure of H₂?
An empty steel container is filled with 0.0400 atm of HF. The system is allowed to reach equilibrium. If Kp = 2.76 for the reaction below, what is the equilibrium partial pressure of H₂? 2 HF (g) ⇌... more
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10/16/20

Balanced equation
A. Write a balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coefficients.A precipitate forms when aqueous solutions of lead(II)... more
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10/16/20

Net Ionic Equation
A. Write a net ionic equation for the reaction that occurs when excess hydrobromic acid (aq) and cobalt(II) carbonate (s) are combined.B. Write a net ionic equation for the reaction that occurs... more
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10/16/20

What is the energy (in J) of 1 mole of the photon? 
A photon has a wavelength of 5.36  10−7 m. What is the energy (in J) of 1 mole of the photon? 
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10/16/20

What is the wavelength of the photon in nm?

A photon has a frequency of 6.7  1016 s−1. What is the wavelength of the photon in nm? For your answer, only type in the numerical value with three significant figures. Do NOT include the unit. 1 m... more
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10/15/20

For the diprotic weak acid H2A, Ka1=2.3x10^-6 and Ka2=6.2x10^-9. What is the pH of a 0.0650M solution of H2A. What are the equilibrium concentrations of H2A and A^2-?
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