01/05/18

What is nerve impulse
Nerve impulse  Transmission of impulse  Properties of nerve impulse Brain  Spinal cord 
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01/04/18

What impact does engineering have on neuroscience
basically how does engineering fit in neurosicence
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01/04/18

Is it possible to predict in which acid will a precipitate dissolve? Or will it dissolve in acid at all?
For example, how do I know in which acid will BaCO3 dissolve? How do I know that CaC2O4 doesnt dissolve in CH3COOH without looking at a textbook?
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01/04/18

mass, volume, and density
In this word problem the mass of Aluminum is 34.7 so how much is the volume (cm^3) and density ( g/cm^3)?
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01/04/18

Calculate the mass of 4.5×10^ 8 molecules of nitrogen
Calculate the mass of nitrogen molecules give the molar number
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01/04/18

chemistry: unknown carbonate
A 1.1000 gram carbonate sample chosen from Li2CO3, K2CO3, Na2CO3 and CaCO3 was reacted with H2SO4 and was found to lose 0.4831 gram of CO2. (1) Show the calculation of the % CO2 in the unknown... more
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01/03/18

Chemistry help.
A rock weighing 30.0 g is placed in a graduated cylinder displacing the volume from 22.3 mL to 27.6 mL. what is the density of the rock in grams/cubic centimeter?   D=M/V M=DxV V=M/D
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01/03/18

organic carbon represents the largest source of carbon
True or false question 
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01/03/18

Question on science experiment with bacteria
Can you do a science experiment on hand sanitizer killing bacteria that has already been grown in a Petri dish? I swabbed 6 different everyday items and grew the bacteria in a Petri dish. So know I... more
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01/02/18

What volume of oxygen, o2, at stp can be prepared by the complete decomposition of 0.100 mol of potassium chlorate kclo3? 2kclo3=2kcl+3o2
I need help on this question. I would like work to help me figure out the problem.
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01/02/18

A pail holds 234 gallons of water. How much is this in cups?
tHIS IS A MATH WORD PROBLEM ABOUT CUSTOMARY CONVERSIONS.
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01/01/18

Calculate the change in entropy (ΔS) with with no values to entropy ?
How can I Calculate the change in entropy (ΔS) at 1 ATM and 100 ◦C with No entropy values to the reactions:   H2O(l) → H2O(g) ΔH = + 4067 KJ/mol?
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01/01/18

Thermodynamics
calculate enthalpy change for reaction 2c+3h2->c2h6.given that sublimation energy of carbon is 716.7 KJ/mol and the bond energy of H-H,C-H,C-C bonds are 433,413,348kJ/mol
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01/01/18

1. reaction of sulfur with chlorine = sulfur dichloride 2. sulfur dichloride with acetic acid
hi dear i am trying to make acetic anhydride as follows 1. reaction of sulfur with chlorine = sulfur dichloride2. sulfur dichloride with acetic acid= acetyl chloride3.acetyl chloride with sodium... more
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12/29/17

Why is the Kd equation Kd=Koff/Kon instead of K=Kon/Koff?
Lets say a general equation for enzymes is E+S<-->ES<-->E+P, and an expression for the Kd of the enzyme is Kd=[E]+[S]/[ES]. Most K expressions are [Products]/[Reactants], right? In the... more
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12/29/17

What is the most stable monatomic ion formed from phosphorus?
A question that I had.
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12/28/17

Does Iodine exist as only I
In class 12 HSC board Maharashtra book there is a reaction of oxidation of I¯ (iodine) to only I, Does Iodine exist only I , not I2
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12/28/17

Al2O3+H2O→ ...... How to solve it with steps?
Al2O3+H2O→ ......How to solve it with steps?
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12/27/17

What is the area of a room that is 300 ft in width and 70 in length
Math prep
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12/27/17

C61H88N16O14 how does this injected into the human body react?
I  need to know the effects this has on the body separate and as a whole.
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12/26/17

AP Chemistry Orbital Diagram of Neutral Oxygen Atom
The link below correlates to the question: http://prntscr.com/hsqjdg   I already filled out the diagram (A) I am just having difficulty answering the question:   (B) Using your diagram above,... more
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12/26/17

AP Chemistry PES
The link below is the picture that correlates with the question: http://prntscr.com/hsqi56   Here's the question:   The above PES belongs to a neutral chlorine atom   (A) What wavelength of... more
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12/26/17

Calculate the mass of glucose needed to prepare 250g of 5% solution of glucose. answer with steps.
its from chemistry and I think it is molecular mass not sure about this please give me the answer.it is a question of 9th standard.
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12/24/17

AP Chemistry Question
Which of the following statements best explains why phosphorus ions tend to have a charge of -3?   (A) Phosphorus atoms want to gain 3 electrons in order to fill their p-subshell (B) Phosphorus... more
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12/22/17

Calculate the wavelength of Radio 4 which broadcasts on a frequency of 198kHz
 needs to include the units
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