Part A) Approximately how many mL of 5% BaCl2 solution would be
required to precipitate all the sulfate if we assume that your
samples are pure Magnesium sulfate? Assume that the density of the
barium chloride solution is 1.00 g/mL.
Part B) If the samples were pure potassium sulfate would you
require a smaller or larger volume of barium chloride solution than
the amount calculated in (Part A) above?
Crucible/sample Number
1
2
3
Mass of unknown sample (g)
0.3623...
How many milliliters of 0.120 M NaOH are required to
tritrate 50.0 mL of 0.0998 M hydrochloric acid to the equivale
point the Ka of hypochlorous acid is 3.0×10^-8. What is the pH
after the NaOH is added?
Clark 202
Part 1: Approximately how many bits are required to address a 4M
x 16 main memory if:
a. Main memory is byte addressable?
b. or Main memory is word addressable?
Part 2: Consider 256 x 8 RAM chips for the following:
a. About how many are needed to provide a memory capacity of
4096 bytes?
b. How many lines must go to each and every chip?
Part 3: Digital computers have a memory unit with 24 bits per...
Part A: How many milliliters of 0.120 M NaOH are required to
titrate 50.0 mL of 0.0998 M butanoic acid to the equivalence point?
The Ka of butanoic acid is 1.5 x 10^-5.
Part B: What is the pH at the equivalence point?
How many milliliters of 0.100 M NaOH are required to neutralize
the following solutions?
(a) 8.00 mL of 0.0500 M HCL
(b) 20.00 mL of 0.126 M HNO3
(c) 45.00 mL of 0.215 M H2SO4
How many milliliters of 0.100 M HNO3 Are needed to neutralizw
the following solutions
34.7 mL of 0.775 M Naoh _____mL
58.5 mL of 0.0100 M Al(OH)3 ____mL
Suppose a block cipher uses m-to-m bits S-boxes. How many bits
are required to store the look-up table of k different such m-to-m
bits S-boxes? Give a formula in terms of k and m. Hint: A look-up
table for one DES S-box requires 256 bits of storage.
5. How many kJ of energy are required to change 1.00 m^3 of pure
water by 1.0*C? Assume a perfect system. The specific heat of the
water is 4.184 J/g*C. The density of water is 1.000 g/mL.
6. 2.500 grams of metal X (molar mass 65.39 g/mole) was reacted
with 100.0 mL of a 1.500 M HCl solution in a coffee cup
calorimeter. The temperature went from 12.50 *C to 40.50 *C.
Determine the reaction enthalpy per mole of metal...
a) How many moles of
Al2(SO4)3 are
required to make 45 mL of a 0.080 M
Al2(SO4)3 solution?
(Hint, molarity is moles per liter. You know the molarity. You
are given the number of mL's, which can be converted to liters.
Just set it up so the units cancel and you get "moles".)
_____________ moles
Al2(SO4)3
b) What is the molar mass of
Al2(SO4)3, to the
nearest gram?
_____________ [grams/mole]
c) What mass of
Al2(SO4)3 is
required to make 45...
How many years are required for ANY principal investment amount
(P) to TRIPLE (m=3) given an annual interest rate of:
a) r =20%? please show all work and explain