10/16/17

Ion exchange column estimate
The question is: Suppose another student attempts to do an ion exchange on a column that is already nearly saturated with Co2+ and Zn2+. Will his calculated % Co be high or low?
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10/16/17

Dry basis moisture content of this piece of wood when it had been dried to a weight of 15 lbs
A piece of wood had an initial weight of 18 lbs. After it was totally dry, it weighed 11 lbs.
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10/15/17

Can you help me with this Grahm's Law AP Chemistry Problem?
The rate of effusion of a particular gas is 24.0 L/min. Under the same conditions, the rate of effusion of CH4 is 47.8 L/min. What is the molar mass of the unknown gas?
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10/15/17

Consider two separate 1.0 L gaseous samples of H2 and O2. How can the samples have the same average velocity at STP?
Can you please help me with this problem?   Thanks
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10/15/17

On Friday, a local hamburger shop sold a combined total of 312 hamburgers and cheeseburgers. The number of cheeseburgers sold was three times the number of ha
idek the answer to this question can someone help
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10/15/17

which name of Zn(OH)2 compound is right? Zinc Hydroxide, or Zinc(||) Hydroxide ?
i know that Zinc is one of the metals cations, but i don't know if it's a transition metal too. I asked my professor once and he preferred the second one Zinc(||) Hydroxide, but after i researched... more
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10/15/17

Escape from an aversive stimulus is a ______ reinforcer
This question is about dreams, sleep, and memory.
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10/15/17

Provide the chemical reaction being demonstrated in the experiment. it should include the starting materials, reagents, and products.
Procedure:1) Accurately weigh approximately 0.40 g of Dimethyl maleate into a 50 mL round bottom flask that possesses a ground glass joint, and record the weight.2) Dissolve the Dimethyl maleate in... more
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10/15/17

If insufficient amounts of oxygen are present within the cell during aerobic respiration, how and why will this affect ATP production
i dont understand this question and have tried googling the answer, cant find anything. help!
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10/15/17

How much of another coffee that costs $1.50 should the cafe mix with the first?
A coffee mix is to be made that sells for $2.50 by mixing 2 types of coffee. The cafe has 40 ml of coffee that costs $3.00. 
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10/15/17

EXTRACTIONS: What if methylene chloride was used as the organic solvent instead of diethyl ether?
If methylene chloride (CH2Cl2) was used as the organic solvent instead of diethyl ether what would be different when performing the extractions?    I've already done the lab where we had to... more
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10/15/17

Good question
A substance is 99% water .some water evaporates leaving a substance that is 98%water.how much of the water evaporated?
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10/14/17

How many mg for first powder and second powder are required to make mixture
A pharmacist has two vitamin-supplement powders. The first powder is 20% vitamin B1 and 30% vitamin B2. The second is 15% vitamin B1 and 10% vitamin B2. How many milligrams of each powder should... more
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10/14/17

is the sodium potassium pump a glycoprotein
Is the sodium potassium pump considered a glycoprotein since it is an integral protein and also a carrier protein?
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10/14/17

What molecules will react with FeCl3
Multiple answer what molecules will react with FeCl3 A. Cyclohexene B. Chlorobenzene C. ChlorophenolD. Phenol
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10/14/17

help help help
A lab technician mixed a 690 ml solution of water and alcohol. If 3% of the solution is alcohol, how many milliliters of alcohol were used, and how many milliliters of water were used
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10/13/17

a sample of vinegar is 4% acetic acid by mass, if the desnity of vinegar sample is 1.006g/ml what volume is needed to obtain 65.7g of acetic acid?
hello please help me with this problem for I am in dire need of assistance 
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10/13/17

neutrilization reaction
Fe(OH)3 + 3HNO3 > Fe(NO3)3 + 3H2O   in the product why  is the NO in parenthesis with a 3 in it and why does it have a subscript of 3
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10/13/17

coefficient and subscript question
This will be a double displacement/neutralization reaction. It is written as follows:H3PO4 + 3LiOH ==> Li3PO4 + 3H2O as a BALANCED EQUATION.so why does the coefficient in 3lioh go as a subscript... more
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10/13/17

Pure acid is to be added to a 5​% acid solution to obtain 95 L of 75​% solution. What amounts of each should be​ used?
Please Solve
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10/13/17

The sum of the product of 4 and x and the postive difference between 5 and 6
Just need help on how to but it in a equation Please 
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10/13/17

Flag that is 396 m in length by 39600 m in height what is the area
12.3 the worlds largest flag problems 1-3 
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10/12/17

how much aluminum chloride will be produced?
Aluminum reacts with magnesium chloride to form aluminum chloride and magnesium metal. If 45.56 grams of aluminum react with 86.9 g of magnesium chloride, how much aluminum chloride will be produced?
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10/12/17

stiochiometry
chlorine is purpose on large scalate by the electrolysis of aqus sodium chloride solution .caculate the mass of nacl required to produced 100gm cl?
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10/12/17

a leaky faucet drips at the rate of .5 pint per hour. How many gallons will drip in 30 days?
I did the problem, I'm just trying to figure out if I did it correct and got the correct answer
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