#### The following questions deal with the nature of light and color. (Enter your answers using scientific notation.)

a) A photon has a wavelength of 510. nanometers (nm). What is the length in meters?b) What is the frequency of this photon? _____ s-1c) What is the energy of this photon? ___J

#### When ionic solids dissolve in water, they produce soluble aqueous cations and anions. For example, adding MgBr2 solids to water will produce ions according to the dissolution reaction below.

MgBr2(s) → Mg2+(aq) + 2 Br−(aq)cation AnionIn this lab, you will be observing the color of emission from ions dissolved in solution. Please write the dissolution reaction for each of the...
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08/27/22

#### Assume the complete reaction of 6.53 g of O2 in the following reaction to determine the other quantities. 2 O2 + 3 Fe → Fe3O4

Assume the complete reaction of 6.53 g of O2 in the following reaction to determine the other quantities.2 O2 + 3 Fe → Fe3O4(a) moles of O2 reacting(b) moles of Fe required (c) moles...
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08/26/22

#### Calculate the pH of an aqueous solution of the following:

2 x 10^-8 M KOHSo, for this I am getting the -log(2x10^-8) and I am getting 7.69 but the answer is suppose to be 7.1?Could anyone show how they get to the correct answer? I think I am doing...
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#### Help me solve this problem

The specific heat of solid iron metal at 273.15K and 1 bar pressure is 0.449 J/g*K. How much heat (in units of kJ) is released when 96.01g of Fe(s) cools from 338.5K to 293.9K.Assume the specific...
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06/27/22

#### What mass of aluminum must be used to produce 5.00 L of H2 gas at STP. 2Al + 6HCl 2AlCl3 + 3H2

gg/molmolLL/mLmol

02/16/22

#### what is the molarity

The flask contains 25 mL of an unknown diprotic acid aqueous solution that reacts in a 1:2 stochiometric ratio with NaOH. Titrate the solution with NaOH to determine the concentration of the...
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02/16/22

#### what is the weigh out

A student wishes to prepare 250-mL of a 0.171 M sodium acetate solution using solid sodium acetate, a 250-mL volumetric flask, and deionized water.(a) How many grams of sodium acetate must the...
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02/09/22

#### My instructor wants us to answer this question

Show that a ∆T = 2.0 C is the same as ∆T= 2.0 K.

02/09/22

#### Calculate molar mass of X, knowing that X effuses at a rate of 28m/s and nitrogen effuses at a faster rate, 43m/s.

Calculate molar mass of X, knowing that X effuses at a rate of 28m/s and nitrogen effuses at a faster rate, 43m/s. (Hint: you need to get rid of the square root before doing any mathematical...
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02/08/22

#### What volume of a 2.70 M KI stock solution would you use to make 0.330 L of a 1.25 M KI solution?

PLS HELPPPPPPPPPPPPPPPP

02/02/22

#### What would be the mass of an O2 gas having a volume of 72L at a pressure of 22.7mmHg and a temperature of 87oC.

What would be the mass of an O2 gas having a volume of 72L at a pressure of 22.7mmHg and a temperature of 87oC.

#### Gaseous butane (CH3(CH2)2 (CH3) reacts with gaseous oxygen gas (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2O)

What is the theoretical yield of water formed from the reaction of 4.65g of butane and 26.5g of oxygen gas? Round your answer to 3 significant figures.= _____ g

01/27/22

#### Equilibrium and using ICE tables

A reaction vessel initially contains only 3.5 atm of N₂O₄. When the system reaches equilibrium according to the reaction below, there is 1.7 atm of NO₂ in the vessel. What is Kp for this reaction?...
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01/18/22

#### help me pls w this chemistry question

A gas occupies 24 L at 273 K and 1.0 atm. What is the volume if the conditions change to 388 K and 3.0 atm?

04/21/20

#### Gas Law Chemistry

1) How many liters are occupied by 1.05 mol of nitrogen at 198◦C and 0.564 atm pressure?2) A gas sample occupies 4.71 L at 39◦C. What is the pressure given that there are 1.18 mol of gas in the...
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04/21/20

#### STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEMICAL REACTIONS

What mass of oxalic acid,H2C2O4 is required to prepare 300 mL of a solution that has a concentration of 0.15 M H2C2O4 ?Mass___g

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