Total # Posts: 51
What is the composition of a methanol () propanol () solution that has a vapor pressure of 121 torr at 40°C? At 40°C, the vapor pressures of pure methanol and pure propanol are 303 and 44.6 torr, respectively. Assume the solution is ideal. Mole fraction of ...
October 5, 2016
Pentane (C5H12) and hexane (C6H14) form an ideal solution. At 25oC the vapor pressures of pentane and hexane are 511 and 150 torr, respectively. A solution is prepared by mixing 25 mL pentane (density, 0.63 g/mL) with 45 mL hexane (density, 0.66 g/mL). What is the vapor ...
October 5, 2016
Need help 6th grade math
A large pizza has 8 slices determine whether 6 large pizzas will be enough for 24 people if each person eats 2 to 3 slices of pizza Plz I need help By savanna
September 13, 2016
AP Environmental Science
Why is it necessary to eliminate absolutely all invasive fire ant colonies to eradicate the invasive population? A)Every colony has a major impact on native flora and fauna. B)Because the last colony found is the one housing the invasions queen. C)Even a single remaining...
September 22, 2015
During the half-time show of a football game, a trumpet player and a tuba player start at the same position on the field. The trumpet player then marches 76.4 ft directly toward the goal line, and the tuba player marches directly toward the sideline. At the end of their march...
May 4, 2015
Thanks! The site actually asks for 5 s.f., and it's saying that I am wrong no matter what I am typing in... I will just have to ask my teacher about it tomorrow! Thanks again!
January 5, 2015
Calculate the moles of CO2 formed when 4.2 mol of C3H8 react with 20.6 mol O2. Answer in units of mol. So, the balanced equation is C3H8 + 5 O2 ==> 3 CO2 + 4 H2O . I thought the answer would be 12.36 mol, but when I type it in it's wrong. Please help!
January 5, 2015
For the reaction ?CH4+ ?O2 ==> ?CO2+ ?H2O, what is the maximum amount of CO2 (44.0095 g/mol) which could be formed from 3.67 g of CH4 (16.0425 g/mol) and 4.23 g of O2 (31.9988 g/mol)? Answer in units of g I know that you have to balance the equation, so the coefficients 1, ...
December 1, 2014
The price of a new car is $24,000. Assume that an individual makes a down payment of 25% toward the purchase of the car and secures financing for the balance at the rate of 10%/year compounded monthly. (Round your answers to the nearest cent.) (a) What monthly payment will she...
May 19, 2014
On Monday, it snowed a total of 15 inches. On Tuesday and Wednesday, it snowed in additional 4 1/2 inches and 6 3/4 inches respectively. A weather forecaster says that over the last three days, it snowed over 2 1/2 Feet. Is this a valid claim? Justify you answer.
November 15, 2012
ms. gries is an athlete. she is skis every day for 5 days. she skis for 1 1/2 hours for her first day and increases her time by 1 1/4 hours for her next four days. how many hours will she ski on the fifth day? show you work
February 26, 2012
A bag holds 40 erasers that are each the same size and shape.Eight of the erasers are red. You reach into the bag and select one eraser at random, what is the probability it is not red?
April 19, 2011
In two to three well-developed paragraphs, explain how the graph below helps support the concern that burning fossil fuels has changed the atmosphere. Describe, in your own words, the change shown in the graph and how this change is occurring in the atmosphere. i cant post a ...
March 25, 2011
the characters nat hocken from the story "the birds by,Daphne du Maurier" and general zaroff from "the most dangerous game by, Richard Connell" must overcome internal foes as well as external monsters list and explain each character's internal conflicts.
March 17, 2011
A political scientist aruges that we have made all the constitutional changes necessary to expand sufferage. What do we need to do now is to foster the civic norm that increse citizen participation. Do you agree of disagree with that argument and WHY???
October 12, 2007