J.R. S.

use solubility rules to predict whether or not a precipitation reaction will occur when the following aqueous solutions are mixed. write the molecular and the net ionic equation for each reaction... more

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General Chemistry

03/28/17

CAlculate the partial pressure of diethylether. And calculate the total pressure on the container

A sample of 5.50 mL of diethylether (C2H5OC2H5; density= 0.07134 g/mL) is introduced into a 6.50 -L vessel that already contains a mixture of N2 and O2, whose partial pressures are Pn2= 0.751 atm... more

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Word Problem

03/28/17

STORY PROBLEM

If the president of a university makes three times as much as one of the department head. If their total salaries equal 250,000 find the the department's head salary.

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Fraction Ward Problem

03/28/17

your car gets 16mpg in the city and 28mpg on the highway. You spend 2/3 of the mileage in the city and 1/3 on the highway. Gas costs 3.00 a gallon.

Estimate annual fuel cost based on an average of 24,000 miles driven per year

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Any Help Will Be Useful

03/28/17

2 Chromatography Experiment

In a chromatography experiment, a student calculated an Rf value for alanine of 0.70 and 0.91 for leucine. Which amino acid traveled higher on the chromatography paper? Explain your... more

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Other

03/28/17

How far apart are the two ships after 3 hours?

Two ships head in opposite directions, one is traveling at 12 kilometers per hour and the other is traveling at 16 kilometers per hour. How far apart are the two ships after 3 hours?

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Chemistry Thermodynamics Chem 1211

03/28/17

Thermodynamics problem! Please help!

A student takes a Styrofoam cooler in fills it with 2.00 L of water. He then adds a small amount of sodium to it and it reacts according to the equation below. The initial temperature of the water... more

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Decimals

03/28/17

A girl on the XC team must run the 5KM course in less than 20 min. What is the average speed of a 20 min runner, in Km per hour? In meters per second?

Can you please have the answer be to two decimal places, and can you explain it so I can understand it? Thanks!

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Math Word Problem

03/28/17

Mr geometry, Ms Algebra and Ms Calculus ordered similarly priced lunches and agreed to split the bill plus 15% tip.

How much is person pay if the BILL IS $24.60

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Word Problem Percentage Percentages

03/28/17

Suppose you buy a camcorder for $495 from A1 Electronics. The camcorder is on sale for 25% off and the sales tax rate in yours country is 5 1/2%.

How much is the discoun? How much is the sales tax, what is the total cost of the camcorder

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Chemistry Stoichiometry Stoichiometery

03/27/17

Got a Chemistry Stoichiometry Problem.. Please Help!

Question: The final step in manufacture of pure platinum (for use in automobile catalytic converters and other purposes) is the decomposition reaction of (NH4)2PtCl6. In addition to the solid... more

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Chemistry Thermodynamics

03/27/17

Thermodynamics problem. Please help!!

A student takes a Styrofoam cooler in fills it with 2.00 L of water. He then adds a small amount of sodium to it and it reacts according to the equation below. The initial temperature of the water... more

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Chemistry

03/27/17

UV spectrum

I have a problem with UV Spectrum chemistry. I dont know how to calculate lambda max for molecules with a single C-c double bond. Please help :) for exmple for Cholesterol

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Math Math Help Math Help For 7th Accelerated

03/27/17

Cal counted the number of miles he walked. He walked 8 1/8 miles in 2 1/2 weeks. If he went the same number of mi. per week, how many mi. did he walk in 2 weeks

I need to know how to do this for the GA Milestones

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Math, Business,

03/27/17

The value of a car depreciates by 20 % in a year. What will a car, currently priced at $37,000 , be worth in a year's time? (with explainaion please)

business math

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Ap Chemistry

03/27/17

Which could be added to a solution of potassium fluoride to prepare a buffer? A) sodium hydroxide B) potassium acetate C) hydrochloric acid D) sodium fluoride

really struggling to understand why the answer is HCl when I though buffers were always weak acids and bases. How does adding HCl create a buffer.

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Chemistry Measurement Word Problem Modeling With Equations

03/27/17

Half life equation model

An organic sample from a Chinchorro mummy was found to contain 54.29% of the relative proportion of carbon-14 found in living matter and the atmosphere. Approximately how long before the carbon-14... more

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Algebra Question

03/26/17

There are two numbers whose sum is 144 onrnumber is three times as large as the other number what is the smallest number

There are two numbers whose sum is 144 one number is three times as large as the other number what is the smallest number

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Math

03/25/17

how much of each mixture will you need to obtain the desired solution

You need 1125 mL of a 45% alcohol solution. On hand, you have a 5% alcohol mixture and a 80% alcohol mixture. How much of each mixture will you need to obtain the desired solution? You will... more

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Which of the following is a possible equivalence that can be used in a conversion?

If you were asked to convert 25 cg to the unit hg, which of the following would be the first fraction used in the conversion?