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Butane is a gas that is commonly used for camping stoves and lighters. By mass, it is made up of 82.6% of Carbon and 17.4% of Hydrogen. Look for its empirical formula. If I have 7.85g of Butane in a 1.5 liter tank, with a pressure and temperature reading of 2.5 atmospheres (ATM) and 65.0 oC respectively. What is its molar mass and its molecular formula?
A standard iodine solution was standardized against a 0.4123 g primary standard As2O3, requiring 40 mL of iodine solution. What is the normality of iodine solution? MW of As2O3= 197.84
A simple cubic cell contains one metal atom with a metallic radius of 100 pm:
a. Determine the volume of the atom(s) contained in one unit cell
[the volume of a sphere = (4/3)πr3].
b. What is the length of one edge of the unit cell?
c. Calculate the volume of the unit cell.
d. Determine the packing efficiency for this structure.
e. Use the steps in Problem 11 to calculate the packing efficiency for a bcc unit cell with a
metallic radius of 1.00 Å.
Consider the following reaction:
2 NO + 2 H2 → N2 + 2 H2O
a. The rate law for this reaction is first order in H2 and second order NO. Write the rate law.
b. If the rate constant for this reaction at 1000 Kelvin is 6.0 x 104 M -2 s-1, What is the reaction rate when [NO] = 0.025 M and [H2] = 0.015 M?
The position of a particle along the x-axis depends on the time according to the equation x=mt2-nt3, where x is in meters and t in seconds. Determine what dimensions and units m and n must have?
Write the following in terms of SI base units using scientific notation
47Mg
- 9.8g/cm3
At 50.° C the vapor pressure of ethanol is 0.30 atm,acetic acid is 0.08 atm,water is 0.12 atm,and acetone is 0.84 atm.
A. arrange these substances in order of increasing intermolecular forces of attraction.
B. arrange these substances in order of increasing boiling point temperature.
Acetaldehyde has absorption signals at 160, 180 and 290 nm What type of transitions are responsible for each of these absorptions?
have about 10g of iron(ii) ammonium...
Question: We have about 10g of Iron(II) ammonium sulphate crystals. We mix these and make a 20cm3 acidified...
We have about 10g of Iron(II) ammonium sulphate crystals. We mix these and make a
20cm3 acidified solution of this. Approximately 21.25cm3 of potassium dichromate(VI)
(0.02 mol dm-3) is needed for oxidation of 25cm3 of the solution made.
Given the formula of crystal as 𝐹𝑒𝐻4𝑆4. 𝑥𝐻2
The value of a+b+c+x is?
An ice cube of mass 65 g is taken from a freezer at -15o C and dropped into 125 cm3 of water at 85o C. What will be the final temperature of the mixture? The specific heat of ice is 0.5 cal/g.o C and latent heat of fusion of ice is 80 cal/g.
