Chemistry - March 2007

plants use CO2, and H2O in Photosynthisis to make glucose (C6 H12 O6). if a plant has 88 grams of CO2, and 64 grams of H2O determine the following:

limiting reactant


excess reagent and mass in excess


mass of glucose produced






this one realy stumped me, I got 89.318 grams of glucose produced, and i cant figure out which is the limiting reactant and excess reagent.

thanks to whoever answers

2007-03-11 09:45:15 · 1 answers · asked by daniel T 3

You need to produce a buffer solution that has pH 5.12. You already have a solution that contains 10millimoles of acetic acid. How many millimoles of solid sodium acetate will you need to add to this solution? (The pKa of acetic acid is 4.74)

Can someone help me answer this? (I don't have an answer for it though)

2007-03-11 09:38:41 · 1 answers · asked by Anonymous

This is not referring to intake of supplements just in take from food. The RNI is set at 550 mg p'day and i would like to find out problems when going over the upper RNI limit of 1,100mg p'day
thanks

2007-03-11 09:34:29 · 1 answers · asked by Sars 1

Calculate [ OH - ] of a 0.340 M solution of Pyridine C5H5N Kb = 1.70e-9

2007-03-11 09:22:22 · 1 answers · asked by Anonymous

i'm working on a science project and i need to know where to be able to buy sugars "glucose,sucrose,maltose,galactose,maltose,lactose) online or in a common grocery store.

2007-03-11 09:04:54 · 2 answers · asked by hoodie 1

2007-03-11 08:53:26 · 1 answers · asked by Katdabrat 2

If the normal body temperture in the Faherheit scale is 98.6 degrees than what is the Celsius temperture?

2007-03-11 08:49:14 · 3 answers · asked by cheli 2

fill the water bottle completley with water.
place the medicine dropper in the bottle of water

squesse the sides of the bottle....the dropper will sink, why??????

when you release the sides of the bottle.....why does the dropper rise???

please help me with this lab?????

2007-03-11 08:34:24 · 1 answers · asked by Anonymous

2007-03-11 08:33:39 · 1 answers · asked by sbeharry03 1

place a hard-boiled egg in a small saucepan filled with water.
hold the saucepan under running water so that the water runs
tilt the saucepan toward you slightly.


Use your knowledge of pressure and Bernouli's principle to explain the odd behavior of the egg????

2007-03-11 08:31:22 · 1 answers · asked by Anonymous

2007-03-11 08:19:31 · 6 answers · asked by outdoorgal 2

pH vs pKa in membrane transfer

2007-03-11 08:18:40 · 1 answers · asked by Paul P 1

And please explain it too. Thanks!

2007-03-11 08:03:37 · 3 answers · asked by kk 2

need a chemical equation as well, want the information for a lab
thanks

2007-03-11 08:02:52 · 4 answers · asked by lily a 1

Which is the stronger base - the chloride ion (Cl-) or the acetate ion (C2H3O2-)?

I can't find the answer in my bookk. :(

2007-03-11 07:58:37 · 5 answers · asked by Anonymous

2007-03-11 07:54:43 · 1 answers · asked by viktoria y 1

We are told to find the molarity of Cu2+ in solution B.

Solution B contains:
5mL copper iodate (aq)
1 ml en
Rest = Water to the calibration mark
Total V = 10mL

Should I do M1V1 = M2V2?

V1 = .005L
V2 = .0100L
M1 = Not Given
M2 = Not given.

Can I take grams of Cu(IO3)2 used and get moles. Put the moles of Liters to get Molarity, thus getting M1?

If so do I use the Liters of 5mL (its original volume) or the final 10mL?

Thanks

2007-03-11 07:50:47 · 3 answers · asked by Paulllll C 3

2007-03-11 07:50:42 · 4 answers · asked by viktoria y 1

In chemistry class we did a lab where we put some water in a soda can and heated it to a boil and then flipped it over into cold water and the can crushed. Now I have to write a paragraph on why the can crushed...does anyone know?

2007-03-11 07:50:00 · 7 answers · asked by Ggvhjbghvj 2

I cant figure out the equations to figure it out if anyone can show the steps mucho aprreciated

2007-03-11 07:30:04 · 3 answers · asked by Anonymous

Acetic acid is a weak acid in water. What does this indicate about the affinity of the acetate ion for protons compared to the affinity of water molecules for protons? If a solution of sodium acetate is dissolved in water, the solution is basic. Explain. Write equilibrium reaction equations for the ionization of acetic acid in water and for the reaction of the acetate ion with water in a solution of sodium acetate.

2007-03-11 07:28:24 · 1 answers · asked by Kevin8484 2

CH2----CH=CH2

CH3CH=CH----CH3

HC=CH

2007-03-11 07:26:07 · 1 answers · asked by shortydidi03 2

2007-03-11 07:05:57 · 2 answers · asked by Iryna 2

I am doing a calorimetry lab, and I need to convert from J/Kg degrees Celsius to J /g/K ? can anyone help??? asap???

2007-03-11 06:40:37 · 3 answers · asked by aquaticneko 2

How many calories of heat could be transferred to sore muscles?
*21000cal

How much heat energy is absorbed when 20.0g of ice melts?
*6680J

Am I right for these 2 questions? I just want to make sure I'm learning this material right. Thanks!

2007-03-11 06:38:59 · 1 answers · asked by kk 2

B. When ocean water cools, the surrounding air: 1. cools 2. warms 3. stays the same

C. Sand in the desert is hot in the day, and cool at night. Sand must have a: 1. high specific heat 2. low specific heat

*I'm not asking you to do my homework, but I have these questions and want to know if I got them right so I'm learning this stuff the right way. I got 2, 1, 2. Am I right? Thanks!

2007-03-11 06:34:24 · 2 answers · asked by kk 2

hi! i need to bring in supplies to chemisrty class tomorrow to build a caffeine moecule. I know that the c is carbon, the o is oxygen, and the h is hydrogen. What is the N? I know that it should be nitrogen, but I cannot find any info realted to nitrogen in caffeine. also can you think of any household items that would be creative to use in this project???
thanks so much! have a good day everybody!

2007-03-11 06:31:09 · 3 answers · asked by Melt_me_away 2

Help would be greatly appreciated!

2007-03-11 06:26:46 · 3 answers · asked by Troman 1

A certain weak acid, HA, with a Ka of 5.61 x 10^-6, is being titrated with a strong base. A solution is made by mixing 9.00 millimoles of HA and 3.00 millimoles of strong base. What is the resulting pH? Thanks in advance!

2007-03-11 06:22:57 · 2 answers · asked by syndrome1765 1

how come vinegar and baking soda do that foaming thing?

2007-03-11 06:11:55 · 1 answers · asked by Anonymous