Chemistry Answers

The conversion of cyclopropane to propene in the gas phase is a first order reaction with a constant rate of 6.7×10²⁴s-¹ at 500°C.

A. If the initial concentration of cyclopropane was 0.25M, what is the concentration after 8.8 min?

B. How long (in minutes) will it take for the concentration of cyclopropane to decrease from 0.25 M to 0.15 M?

C. How long (in minutes) will it take to convert 74 percent of the starting material?

What is the mass (in grams) of 1.70M sodium sulfide solution that would react with 105 g of cadmium nitrate solution?

Na2S + Cd(NO3)2 = CdS+2NaNO3

The answer is 34.66g. I'd like to know what exactly are the equations that got to that?

the components of a synthetic atmosphere are 80.5 mol percent Ar, 18.0 mol percent O2 and 1.5 mol percent CO2. If the total pressure of the gas mixture is to be 748 Torr, determine the partial pressure for the argon in the mixture.

What is the mass of 2.80 ×10

22

×1022 formula units of NaOH

NaOH (Molar mass = 40.0 g/mol

g/mol)

Calculate the number of moles of NaOH used in the reaction

Determine the amount of heat in kj given off when 5.43x10^5 g of NO2 are produced

>2NO (g) = O2 (g) → 2NO2 (g)

>ΔH=-114.6kJ/mol

1) What volume of 2.25M H₂SO₄ should be diluted with water to form a 1.25L of 1.50M acid?

2) What is the concentration of the original solution if 450 mL; a certain solution is diluted in 750 mL water to form 2.0L of 1.50M HCl?

the reaction of NH3 and O2 forms NO and water. the NO can be used to convert P4 to P4O6, forming N2 in the process. the P4O6 can be treated with water to form H3PO3, which forms PH3 and H3PO4 when heated. how many grams of NH3 are needed to produce 20.44 g of PH3?

According to Langmuir's theory of

adsorption, molecules adsorbing

from the adjacent phase:

the reaction of NH3 and O2 forms NO and water. the NO can be used to convert P4 to P4O6, forming N2 in the process. the P4O6 can be treated with water to form H3PO3, which forms PH3 and H3PO4 when heated. how many grams of NH3 are needed to produce 20.44 g of Ph3?