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Questions Answered

zachtyzon:
How many combinations of a president, vicepresident, secretary, and treasurer can be chosen from a group of 12 students?
 updated 4 months ago
 4 replies
 No Medals Yet
Mathematics

erinnn20:
Do I use q=mc delta T? What is c?
Calculate the heat (in joules) absorbed by the solution in reaction MgO + 2HCl> H20 + MgCl2.
…
 updated 4 months ago
 2 replies
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Mathematics

rgermina5873:
Heptane (C7H16) and octane (C8H18) are constitutents of gasoline. At 80 degree celsius, the vapor pressure of heptane is 428mmHg and the vap…
 updated 4 months ago
 1 reply
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Mathematics

val0512:
why is cholesterol more soluble in organic solvents and not soluble in water?
 updated 4 months ago
 2 replies
 1 Medal
Mathematics

AngelCriner:
Calculate the enthalpy change, ∆H in kJ, for the reaction H2O(s) → H2(g) + 1/2O2(g)
Use the following:
…
 updated 5 months ago
 2 replies
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Mathematics

AngelCriner:
The enthalpy of a system is the same as its:
A. specific heat.
…
 updated 5 months ago
 4 replies
 2 Medals
Mathematics

miszery:
Help Please!!
A block of brass of mass 500 gram and temperature 100C is placed in 300 grams of water at 20C which is in an aluminium cal…
 updated 5 months ago
 31 replies
 1 Medal
Mathematics

Rea_731:
Please help?
Graham's gas law of diffusion:of the three gases H2 , CH4, C3H8 which would you expect to diffuse faster?
…
 updated 5 months ago
 7 replies
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Mathematics

juciystar234:
Best Response Given Plus Fan.!!
…
 updated 5 months ago
 12 replies
 2 Medals
Mathematics

thewinterfawn:
If the magnitude of F1 is greater than the magnitude of F2, then the box is
A) accelerating in the direction of F1
B) moving at constant s…
 updated 5 months ago
 2 replies
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Mathematics

dance36596:
Diatomic molecules will be nonpolar when a pair of shared electrons is located closer to one atom than the other. True or False?
 updated 5 months ago
 1 reply
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Mathematics

djellza:
what's the IUPAC name CH2=CHCH2CH2CH2CH3
CH3C=CHCH2CH3

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 updated 5 months ago
 2 replies
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Mathematics

cwright150:
Ammonia gas is formed from nitrogen gas and hydrogen gas, according to the following equation, N2 (g) + 3H2 (g) arrow 2NH3 (g). If 140 grams…
 updated 5 months ago
 2 replies
 1 Medal
Mathematics

GavinxFiasco:
True or False Statements for Rigid Bodies
 updated 5 months ago
 14 replies
 1 Medal
Mathematics

smileyylove:
anybody in physical science in ca?
 updated 4 months ago
 5 replies
 1 Medal
Mathematics

copheeaddikt:
What is the rate of flow of water from a 1.85 cm diameter faucet if the pressure head is 15.0 m?
 updated 5 months ago
 1 reply
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Mathematics

emilygoetz10:
A researcher studying the nutritional value of a new candy places a 3.00gram sample of the candy inside a bomb calorimeter and combusts it …
 updated 5 months ago
 5 replies
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Mathematics

Blakeg1998:
1)Which conditions will result in the smallest change in momentum?
A)a large force over a long time period
B)a large force over a short…
 updated 5 months ago
 9 replies
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Mathematics

Jacobbenvenutty:
This isnt realy a homework question. Im just trying to fufill my curiosity.
How do we know what angle the Earth or any planet is tilted a…
 updated 5 months ago
 6 replies
 1 Medal
Mathematics

GavinxFiasco:
The roller has a mass of 42 kg and a diameter of 1.24 m. The height of the step is h = 0.16 m. Calculate the minimum force P required to p…
 updated 5 months ago
 8 replies
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Mathematics

kym02:
Title: To measure the resistance by the ammetervoltmeter method.
1) what is an appropriate hypothesis for this?
Thanks :)
 updated 5 months ago
 5 replies
 1 Medal
Mathematics

butterflyprincess:
What is the derivative of f(x)=xe^(5x)
 updated 5 months ago
 18 replies
 2 Medals
Mathematics

ashlynnwilson8:
Suppose you have a mean standardized score of 1200 points with a standard deviation of 200 points.
This data is normally distributed. What …
 updated 5 months ago
 1 reply
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Mathematics

jasmiemarie:
Describe how you would make 100 mL of a hydroiodic acid solution that has a PH of 2.5
 updated 5 months ago
 1 reply
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Mathematics

NotTim:
A solid hydrate weighing 2.682 g was heated to drive off the water. a solid anhydrous residue remained, which weighed 1.420g. Calculate the …
 updated 5 months ago
 2 replies
 2 Medals
Mathematics

chemENGINEER:
A Prof. gave us an upcoming Heat Transfer exam ahead of time, but with some blanks on the exam. Here it is....
 updated 5 months ago
 4 replies
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Mathematics

ninisprincess:
how may kilojoules of heat are required to melt a 10.0g popsicle at 0 degrees C?(assume the same properties as water)
 updated 5 months ago
 1 reply
 1 Medal
Mathematics

Loser66:
about circular motion
We have F = ma. and a = mv^2/r and v = 2pi r/T
what is the function of F respect to T? 1/T?
…
 updated 5 months ago
 23 replies
 2 Medals
Mathematics

lidah:
A substance that helps a reaction to take place, but does not participate in the reaction is called a(n) _____.
…
 updated 6 months ago
 1 reply
 1 Medal
Mathematics

hubbabubba:
How do I solve this question?
x + y + z = 12
6x  2y  z = 16
…
 updated 6 months ago
 62 replies
 2 Medals
Mathematics
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