The energy of light photons varies with wavelength. Calculate the energy per mole of photons for each of the following colors of visible light. Red Light, ? = 691 nm Green Light, ? = 527 nm Blue Light, ? = 411 nm

use coulombs law to calculate the ionization energy in kj mol^-1 of an atom composed of a proton and an electron separated by 249 pm.

E ionization =

the formula we have states (E coulomb approx equals q1q2/r12 ?

Calculate the molar solubility of lead(II) chloride in a 0.10 M calcium chloride solution.

I keep getting 0.0017, but that is incorrect.

1) 1.95 moles of HBr in 250.0 mL flask is consumed in 1.00 minutes in the gas phase reaction 2 HBr(g) → H₂(g) + Br₂(g) at 150°C.   The rate of reaction is __________ M∙s^-1.

2)The reaction A → C is found to be zero order. Which of the following will give a linear plot?

3)Which of the following is not a colligative property?

4)

Yeast and sugar are added to champagne to give the sparkle of carbonation. Under what conditions is carbon dioxide gas most soluble?

5)

In general, the solubility of ________ in water decreases as temperature increases.

6) In a solution, the solvent is:

3. When 0.275 moles of Strontium metal and hydrochloric acid that contains 0.750 mol of HCl are combined they react to completion according to the equation below. How many liters of hydrogen gas, are produced at standard temperature and pressure (STP)?

Sr(s) + 2HCl(aq) → SrCl2(aq) + H2(g)

Dealing with the stability of a protein i found in lab that the basic pH, the protein folded based on my results. However, how can it destabilize a proteins structure? Does it have to do with the temperature as well in the high pH?

If a pure R isomer has a specific rotation of -137.0 degrees and a sample contains 84.0% of the R siomer and 16.0% of it anantiomer, what is the observed specific rotation of the mixture?

Complete and balance the following equations, and identify the oxidizing and reducing agents. (Use the lowest possible coefficients. Include states-of-matter (s), (l), (g), (aq) similar to the given reaction.)
(a) MnO4-(aq) + Cl-(aq) ? Mn2+(aq) + Cl2(g) (acidic solution)
Balanced equation:16H+(aq)+2MnO4-(aq)+10Cl-(aq) ? 2Mn2+(aq)+5Cl2(g)+8H2O(l)
oxidizing agent:   MnO4-Correct.
Reducing agent: Cl- Correct

(b) I2(s) + OCl-(aq) ? IO3-(aq) + Cl-(aq) (acidic solution)

oxidizing agent:OCl- Correct
reducing agent:I2 Correct

(c) Cr2O72-(aq) + I-(aq) ? Cr3+(aq) + IO3-(aq) (acidic solution)
Balanced equation
oxidizing agent  
reducing agent

(d) Pb(OH)42-(aq) + ClO-(aq) ? PbO2(s) + Cl-(aq) (basic solution)
Balanced equation
oxidizing agent
reducing agent

Just starting to get really frustrated with these. I know how to do them (I completed the first one without much issue) but cannot get the rest of them. I don't know what it is that I'm missing/doing wrong. will give addition points for the correct answer as well as good work. Thank you in advance!!!

-In the early seasons of Breaking Bad, Walt and Jessie can frequently be seen testing the pH of their downstream product using commercially available indicators intended for pool water testing. When might it be advantageous to use an indicator vs a pH electrode?

-A student tested a solution with a pH meter and recorded the pH to be 7.43. Calculate the [H3O+] and [OH-] for this solution. (Show your work!)

Problem PageQuestion Liquid octane CH3CH26CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. Suppose 58.3 g of octane is mixed with 71. g of oxygen. Calculate the minimum mass of octane that could be left over by the chemical reaction. Round your answer to 2 significant digits.

a) An iron sulfide contains 36.5% S by mass. The iron sulfide is heated in an atmosphere of pure oxygen, which produces SO2(g) and an iron oxide containing 27.6% O by mass.

Write a balanced equation for the reaction.

If 1.0 kg of the iron sulfide reacts with excess oxygen, what is the theoretical yield of the iron oxide?

b) In the manufacture of Portland cement, limestone (CaCO3(s)) is decomposed into lime (CaO(s)) and CO2(g), in a kiln. Use data from Appendix C in your textbook to calculate how much heat is required to decompose 2.70 × 103 kg of limestone. (Assume that the heats of reaction are temperature independent.)

In experiments concerned with the photoelectric effect, which of the following will increase the kinetic energy of an electron ejected from a metal surface? 1. increasing the wavelength of the light striking the surface 2. increasing the frequency of the light striking the surface 3. increasing the number of photons of light striking the surface A) 1 only B) 2 only C) 3 only D) 1 and 3 E) 1, 2, and 3

What is the product of 4-tert-butyl phenol reacted with p-bromobenzyl bromide when potassium hydroxide and ethanol is added with microwave heating.