Chemistry grade 11
An organic compound is composed of C, H and O. A 0.1005 g sample of this is combusted, producing 0.2829 g CO2 and 0.1159 g of H2O. What is the empirical formula of this compound? If the compound has a molar mass of 14 g/mol. What is the molecular formula?
January 10, 2015
If the pressure is 748 mmHg, and if h= 35mm, what is the pressure of the gas, expressed in atm, If the substance in the tube is oil having a density of 0.788 g/mL? The density of mercury is 13.6 g/mL.
October 26, 2014
Given. a = 25.1 cm and b = 51.2 cm and the forces are F1 = 10.3 N, F2 = 10.6 N and F3 = 14.7 N. The angle between F2 and the horizontal is θ = 27.9 °. Find the magnitude of the net torque on the wheel about the axle through O. Answer in units of N m.
October 19, 2014
Masaru works as a salesperson and earns an hourly wage plus commission.He works 35 hours per week, at a rate of $11.75 per hour. His commission is about $125.00 per week. his expenses account for about 85% of his income. A. How much money does he put into savings in one year? ...
April 30, 2014
A.) start by calculating how long it will take you to save enough money and pay cash with your potential $300.00/month savings, taking into account the $1000.00 you have already saved. B.)Now imagine you have invested your original $1000.00 savings. I.) calculate how much the ...
April 22, 2014
math please help
Your parents have just brought you a care and now you have an opportunity to "deck it out." how would you change/ enhance your vehicle to make it your dream car? What features/parts would you add, including taxes. Imagine you have a job, $1000.00 in savings account ...
April 22, 2014
a cellular phone manufacturer randomly selects 5 phones from every batch of 50 produced. if at least one of the phones is found to be defective, then each phone in the batch is tested individually. find the probability that the entire batch will need testing if the batch ...
November 24, 2013
Write a method main that demonstrates class Employee's capabilities by creating two Employee objects. Initialize one of the objects (give values to the instance variables) using the constructor and display its instance variable values through the display method. Using the ...
October 27, 2012
a ball has a mass of 0.5kg dropped from a cliff top, the ball srtikes the sea below at a velocity of 10m/s. (a)what is the kinetic energy of the ball as it strikes the sea? (b) what was its potential energy before it was dropped? (c)from what height was it dropped?
December 9, 2011
problem # 1 No Zeroes two numbers multiply to give 100 000. Neither of them contain a zero. What are the numbers? problem # 2 Junk Food a burger and a cola togerther cost $3.25. If the burger costs $1.75 more than the cola, how much does the cola cost? PLZ HELP FAST...
December 5, 2011
26. The first five successive ionisation energies of an element are 0.807, 2.433, 3.666, 25.033, 32.834 MJ mol1 . Which one element from those listed below could this element be? (A) B (B) C (C) N (D) O (E) F
August 30, 2011
If a ladder is on a house and the top is touching the house 8 feet above the ground, the bottom is touching the ground 6 feet away from the house, if you move the ladder in 1 foot how high will the ladder be touching the house.
April 5, 2010