Science & Mathematics - 5 December 2007

Initially there is a .500g sample of CuSO4.5H2O and a .245g sample of NH2CH2CO2H (glycine).

We find that there are .002002 moles CuSO4.5H2O and .003264 moles NH2CH2CO2H (glycine). What is the limiting reagent?

How many grams Cu(gly)2.H2O are expected based on the limiting reagent?

2007-12-05 13:35:52 · 1 answers · asked by oceanpotion™ 3 in Chemistry

If an isotope has a half life of 50 million years, and 1/8 of it is left, the age of the rock from which it was taken is:

A. 150 million years
B. 800 million years
C. 300 million years
D. 400 million years

Seriously, I appreciate any real help! Thank you SSSOO much in advance!

2007-12-05 13:32:29 · 4 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-05 13:32:03 · 4 answers · asked by mooman2220 1 in Chemistry

Rated Hp = 4600
Rpm = 1500 (4 Pole)
Power factor = 0.95
Voltage = 3300
Amps = 828
Freq = 50hz
3 Phase

-Trying to work out the output in (MegaWatts) of a motor given the following

-The power input when operating at rated output load and Power Factor

- Efficiency of the motor when operating at rated output load and power factor
[any help thank you]

2007-12-05 13:31:42 · 4 answers · asked by Donut152 1 in Engineering

A homeowner has poured a rectangular concrete slab in her backyard to use for a barbecue area. The length is 3 feet more than its width. There is a 2ft wide flower bed around the barbecue area. If the area covered by the barbecue area and the flower bed is 270 square feet, find the dimensions of the barbecue area.

2007-12-05 13:31:02 · 1 answers · asked by Anonymous in Mathematics

anyone know the two types of malnutrition and what the differences are??

2007-12-05 13:29:50 · 2 answers · asked by Anonymous in Medicine

A gas originally at 27 °C and 1.00 atm pressure in a 3.9 L flask is cooled at constant pressure until the temperature is 11 °C. The new volume of the gas is __________ L.

2007-12-05 13:26:46 · 3 answers · asked by gregmmercer 1 in Chemistry

I have two questions that need to be awnsered

1.Do you get a fake tree,cut down a real tree,or no tree at all

2.What is the point of cuting down a tree(a living thing) decorating it in embarasing popcorn,beeds,and lights and leaving it there to die?

i was just courios

2007-12-05 13:25:58 · 27 answers · asked by Anonymous in Botany

math

2007-12-05 13:22:25 · 2 answers · asked by Anonymous in Mathematics

what would you do?

2007-12-05 13:21:08 · 8 answers · asked by High_Sun 2 in Astronomy & Space

How much work is done in raising a bucket of concrete (1800 kg) to a point 20 m above the ground? (weight= mass x gravity)

please show how you did it

2007-12-05 13:16:24 · 4 answers · asked by garyeestra2 1 in Mathematics

I asked my mom, but she's not sure.

2007-12-05 13:15:24 · 9 answers · asked by Anonymous in Engineering

A couple wants to invest up to $20000. They can purchase a type A bond yielding 9.75% return and a type B bond yielding a 14.5% return on the amount invested. They also want to invest at least as much in the type A bond as in the type B bond. They will also invest at least $10000 in type A and no more than $14000 in type B bond.
How much should they invest in each type of bond to maximize their return?

Let x be the amount invested in type A bond and y the amount invested in type B bond.

a) Write the objective function to be maximized.
P =

b) List the corner points of the feasible region.
Corner points:

c)Determine the amount to be invested in each bond to maximize the return and determine the maximum return:
Amount to be invested in type A bonds: $
Amount to be invested in type B bonds: $
Maximum return is: $

2007-12-05 13:15:08 · 1 answers · asked by timz11 1 in Mathematics

SOLVE: X^3-9X^2=0

2007-12-05 13:14:10 · 9 answers · asked by Mio 2 in Mathematics

2007-12-05 13:12:57 · 71 answers · asked by PJ 1 in Mathematics

you know ho you can drink robotusin.
or take the pill to get a "high" off of it.

can you do the same for alka-seltzer plus
night cold medicine?

or anything else..

or can you only do it for robotusin?

2007-12-05 13:11:25 · 5 answers · asked by Anonymous in Medicine

2007-12-05 13:10:04 · 5 answers · asked by Danielle P 1 in Physics

plz. explain how to do it. I'm fine with just the formulas but would appreciate if everything was solved. :P


A ramp could be used to raise the concrete 20 m.
a) How much work would be required if the ramp formed at an angle 30 degrees with the horizontal?
b) How long would the ramp be?
c) How much force would be required?
(The component of the force // to the ramp.)
(Neglect friction)

2007-12-05 13:08:55 · 1 answers · asked by garyeestra2 1 in Mathematics

2007-12-05 13:05:18 · 2 answers · asked by Anonymous in Mathematics

I'm curious about the importance of the number 64......in "the 64 dollar question"......why 64 in the first place?

2007-12-05 13:03:11 · 1 answers · asked by oj_scott2002 1 in Mathematics

when we mount a camera on a robot for it's vision, then what kind of output is obtained and how such an output from the camera is fed as input to a microcontroller to process it.....pls someone help me

2007-12-05 13:02:50 · 4 answers · asked by santu 1 in Engineering

2007-12-05 13:02:03 · 6 answers · asked by Will 5 in Astronomy & Space

its something for math homework and it confusing!! please help!!!

2007-12-05 13:01:05 · 6 answers · asked by Anonymous in Mathematics

2007-12-05 13:00:32 · 3 answers · asked by allopercia 2 in Biology

A laboratory sample consists of a mixture of two radioactive substances, both of which decay into inert gases which evaporate into the air. The initial composition of the sample by weight is 40% of substance A and 60% of substance B and the initial weight of the sample is 297 grams. After 7 days the sample weighs 124.419451315581 grams and after 14 days it weighs 55.0505357006202 grams.
What is the half-life of substance A?
What is the half-life of substance B?
What will the sample weigh after 25 days?

2007-12-05 12:59:27 · 2 answers · asked by Anonymous in Mathematics

2007-12-05 12:58:22 · 2 answers · asked by Delvis M 1 in Geography

so i know that you startout by solving for the intersection points which is
x^2 - 2x = x + 4
x^2 - 2x - x + 4 = 0
(x - 4)(x + 1)=0
x = 4, -1

top= x + 4
bottom=x^2 +2x

then i solve ofr the area
A= ∫ (top - bottom) dx
A=∫ (x + 4 - x^2 +2x)dx
= ∫ (-x^2 + 3x + 4)dx
= -x^3/3 + 3x^2/2 + 4x

then i plug in b into F and a into F and subtract to get the area

the answer i get is 383/8 which is wrong.. so i dont really see what i'm doing wrong.

2007-12-05 12:56:08 · 2 answers · asked by Anonymous in Mathematics

Which weather prediction tool is most useful for identifying conditions under which tornado might form?

A. Weather maps
B. Surface maps
C. Doppler radar
D. weather satellites

2007-12-05 12:55:21 · 7 answers · asked by The CartoonMasterDudes 1 in Weather

3z^2 + 24z + 45

2007-12-05 12:51:40 · 5 answers · asked by Roar 1 in Mathematics

Terran = Earth, I don't want to hear how fast your pimped-out saucer can fly.

2007-12-05 12:51:22 · 5 answers · asked by Chad m 3 in Astronomy & Space