Chemistry Answers

What is the chemical formula of magnesia mixture? I am trying to do a lab report and I know the reagent for [PO₄] and my teacher told me is was magnesia mix but I can't find the formula for the chemical equation.

predict how CH3 directs an attacking species(such as NO2+, CH3+, Br2 and SO3 to either the 2,3,4 position of the ring during substitution:

Treatment of a 0.2500g sample of impure potassium chloride with an excess of AgNO3 resulted in the formation of 0.2912 g of AgCl (74.55 g/mol). Calculate the percentage of KCl (143.32 g/mol) in the sample

A certain mas of hydrogen gas collected over water at 6°c and 765mmHg pressure has a volume of 35cm^3, calculate the volume when its dry at STP (S.V.P of water 6°c =7mmHg)

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Gaseous butane  (CH3(CH2)2(CH3)

 will react with gaseous oxygen (O2)

 to produce gaseous carbon dioxide (CO2)

 and gaseous water (H2O). Suppose 4.6 g of butane is mixed with 33.3 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to 2 significant digits.

Define the term preformulation and explain the parameters to be considered in preformulation studies

A sample of oxygen gas is at 9.44atm of pressure, has a volume of 19.58L, and is at a temperature of 30.26^oC. How many particles, in moles of oxygen gas are in the sample?

. If the Ksp for the given reaction is 1.8 x 10 ^-10  at 25⁰ C, what is the equilibrium concentration of chloride ions, [Cl-]_eq, expressed in 10^-5 M? 

AgCl_(s)      Ag⁺_(aq) + Cl^-_(aq)

Determine the [OH−] , pH, and pOH of a solution with a [H+] of 6.2×10−13M at 25 °C.

[OH−]= M

pH=

pOH=

Determine the [H+] , pH, and pOH of a solution with an [OH−] of 3.9×10 −13 M at 25 °C.

[H+]= M

pH=

pOH=

Determine the [H+] , [OH−] , and pOH of a solution with a pH of 2.28 at 25 °C.

[H+]= M

[OH−]= M

pOH=

Determine the [H+], [OH−] , and pH of a solution with a pOH of 4.08 at 25 °C.

[H+]= M

[OH−]= M

pH=

Give one example of isomerisation of alkane.