Number of results: 21,631
1. Convert the ffl octal numbers into denary number a) 1527 b) 21 364 2. Convert the ffl denary numbers into binary numbers a) 578 b) 709 3. Calculate the follwing using the octal system. a) 704 + 147 b) 652 - 406 c) 657 * 4 d) 754/6 Thanks
Monday, February 26, 2007 at 10:58am by temise
Am sending the same question coz i can't find the first one on the message boards. So plz help me. 1. 'velocity is a vector quantity, and the kinetic energy of a body is equal to half its mass times the square of its velocity, so kinetic energy must also be a vector.' Comment ...
Monday, February 26, 2007 at 9:15pm by Ishani
Temp - 650 Pressure - 690mm Hg mass - 0.927g volume - 194cm3 How do I calculate the volume of the gas? You have the volume, given. How do I calculate the volume at a different temperature?
Tuesday, February 27, 2007 at 4:05pm by bex
If the arsenic is 76% and oxygen is 24% how would I calculate the chemical composition of of the oc=xide of arsenic that has been formed? Divide 76 by the atomic weight of As (which is 74.92) and 24 by the atomic weight of O (which is 16.00). The two new numbers that you get ...
Tuesday, February 27, 2007 at 4:19pm by bex
I have a chemical composition of As2O3. How do I calculate the mass of oxygen that combines with 1 mol of arsenic to form the oxide of arsenic? How do I use this to obtain the empirical formula of the oxide? That IS the empirical formula of the compound. You calculated the ...
Tuesday, February 27, 2007 at 4:55pm by bex
Can you help me with this please - Temp - 650 Pressure - 690mm Hg mass - 0.927g volume - 194cm3 How do I calculate the volume of the gas at a different temp? & at a different pressure? You can do this two ways. The simplest is P1V2/T1 = P2V2/T2
Tuesday, February 27, 2007 at 5:33pm by bex
If 0.130 g of p-aminophenol is allowed to react with excess acetic anhydride , what is the theoretical yield of acetaminophen in moles? In grams? p-amino. - MW: 109.13g aceta. - MW: 151.16 g ** I just forgot how to do this, I know it's probably REALLY simple. I took a stab at ...
Tuesday, February 27, 2007 at 10:06pm by Richard
A BUFFER SOLUTION IS MADE FORM 0.10 MOLES NaF AND 0.25 MOLES OF HF IN 1 LITER OF WATER ----WHAT WILL THE BUFFER CAPACITY BE IF 1.0M HCL IS ADDED -----WHAT IF 2.0 M OF NAOH IS ADDED?? PLEASE HELP I HAVE NO CLUE WHERE TO EVEN BEGIN!!! Calculate the pH of the solution using the ...
Tuesday, February 27, 2007 at 11:12pm by BRITTANY
Chemistry - Isotopes
The isotope caesium 137 has a half life of 30 years. How long will it take for the amount of this isotope in a sample of caesium to decay to one sixteenth of its original amount? Please can someone explain how I can calculate this from the quantities that have been stated? ...
Wednesday, February 28, 2007 at 6:09pm by Bean
The economy consists of the following: - working-age population: 20M - full time employment: 8M - part-time employment: 2M (1M of whom wish they had full-time jobs) - unemployment: 1M If 0.6M of those unemployed are frictionally, structurally, and seasonally unemployed, what ...
Wednesday, February 28, 2007 at 6:30pm by Freddy
How do I calculate the area of a triangle? To calculate the area of a triangle, multiply the base times the height and divide by 2. http://www.mathopenref.com/trianglearea.html 1/2 of the base of the triangle times the height.
Wednesday, February 28, 2007 at 9:31pm by Jim
DESPERATE NEED OF HELP--Chemistry, almost done
Calculating Yield--need some help finishing problem. Almost done, just need help one ONE step, please help!!? Well we did a lab on limiting reagent/reactants. The balanced equation is Sr(NO3)2 + 2KIO3 --> Sr(IO3)2 + 2KNO3 Mols of Sr(NO3)2 used was .005023 mol and Mols of ...
Wednesday, February 28, 2007 at 9:59pm by Angie
Capital Markets - Bonds
You are buying right now a zero-coupon bond. It has exactly 8 years to maturity, and you expect the YTM to be 6% over the bondís life. Even though you intended to hold it to maturity, you end up selling it after 3 years. By that time, the bondís YTM has risen to 8% due to ...
Wednesday, February 28, 2007 at 11:45pm by joe
A sky diver of mass 80.0 ks jumps from a slow-moving aircraft and reaches a terminal speed of 50.0 m/s. a) What is the acceleration of the sky diver when her speed is 30.0 m/s? What is the drag force on the diver when her speed is b) 50.0 m/s? c) 30.0 m/s? If you assume drag ...
Thursday, March 1, 2007 at 5:36am by Jean
Calculate the force required to pull a copper ball of radius 2.00 cm upward through a fluid at the constant speed 9.00 cm/s. Take the drag force to be proportional to the speed, with proportionality constant 0.950 kg/s. Ignore the buoyant force. Forcedrag=k v = .950kg/s * .09m...
Thursday, March 1, 2007 at 6:09am by Jean
What is the coefficient of variation and how do I calculate it from a dataset? coefficient of variation is simply the standard deviation divided by the mean.
Thursday, March 1, 2007 at 10:45am by weldon
i need to deduce the type of bonding that holds sodium cyanide together and write a balanced equation for sodium cyanide dissolving in water any help would be appreciated sarah Na^+ + :C:::N:^- Na to CN bond is ionic (more or less). C-N bond is covalent. NaCN + HOH ==> NaOH...
Thursday, March 1, 2007 at 12:30pm by sarah
Qn 1. The easy loan company has a finance charge of 0.089% per day on out standing balances.What is the effective rate? Qn 2. Seven days after Jay's company borrowed R10,000,000 interest to the amount of R37,876,71 had to be paid. The simple interest rate equals? come on rita...
Thursday, March 1, 2007 at 2:55pm by rita
Many home barbecues are fueled with propane gas (C3H8). How much carbon dioxide in kilograms is produced upon the complete combustion of 18.9 L of propane (approximate contents of one 5-gal tank)? Assume that the density of the liquid propane in the tank is 0.621g/mL. I have ...
Thursday, March 1, 2007 at 6:31pm by Carry
Chemistry - Gas Laws
Liquid helium at 4.2 K has a density of 0.147 g/mL. Suppose that a 1.00-L metal bottle that contains air at 118K and 1.0 atm pressure is sealed off. If we inject 120.0 mL of liquid helium and allow the entire system to warm to room temperature (25 įC), what is the pressure ...
Friday, March 2, 2007 at 10:07am by Jay