27. The electronegativity difference in diatomic elements is always equal to:
a. -2
b. -1
c. 0
d. +1
e. +2
28. Bonds between diatomic molecules are always;
a. Ionic
b. Covalent
c. Metallic
d. Polar covalent
29. T or F: An ionic bond is the complete transfer of outer valence electrons from one atom to another.
30. Match the toxin to the organism;
a. Cicutoxin 1. Quercus spp.
b. Amatoxins 2. Crotalus horridus
c. Three-finger toxin 3. Loxosceles reclusa
d. Tropane alkaloids 4. Lactrodectus mactans
e. Hydrolyzable gallotannins 5. Toxicodenron radicans
f. Canebrake venom 6. Daucus carota
g. Sphingomyelinase D 7. Galerina marginata
h. ⍺-latrotoxin 8. Micrurus fulvius
i. Urushiol 9. Hyoscyamus niger
31. Factors that effect the toxicity of a poison include all except:
a. Duration of exposure
b. Toxicity
c. Temperature
d. Dose
e. Route of exposure
32. A colloid has two phases:
a. stationary, mobile
b. dispersed, continuous
c. dissolution, sedimentation
d. dilution, disassociation
33. The toxicity of isopropanol is about _______________ ethanol.
a. 2.0 times less than
b. 1.2 times less than
c. about the same as
d. 1.2 time more than
e. 2.0 times more than
Re: Potions & Poisons B
Posted: March 20th, 2019, 6:09 pm
by UTF-8 U+6211 U+662F
Froggie wrote:2. 125 g/0.95 = 131.6 g? It’s probably not this simple...
3Si + 2N2 -> Si3N4
[math]\frac{125\textrm{ g Si3N4}}{0.95} \cdot \frac{1\textrm{ mol Si3N4}}{(28.1 \cdot 3+14.0 \cdot 4)\textrm{ g Si3N4}} \cdot \frac{3\textrm{ mol Si}}{1\textrm{ mol Si3N4}} \cdot \frac{\textrm{28.1 g Si}}{1\textrm{ mol Si}}[/math]
which turns out to be 78.8 grams of silicon.
Re: Potions & Poisons B
Posted: March 20th, 2019, 9:30 pm
by Crimesolver
dvegadvol wrote:27. The electronegativity difference in diatomic elements is always equal to:
a. -2
b. -1
c. 0
d. +1
e. +2
28. Bonds between diatomic molecules are always;
a. Ionic
b. Covalent
c. Metallic
d. Polar covalent
29. T or F: An ionic bond is the complete transfer of outer valence electrons from one atom to another.
30. Match the toxin to the organism;
a. Cicutoxin 1. Quercus spp.
b. Amatoxins 2. Crotalus horridus
c. Three-finger toxin 3. Loxosceles reclusa
d. Tropane alkaloids 4. Lactrodectus mactans
e. Hydrolyzable gallotannins 5. Toxicodenron radicans
f. Canebrake venom 6. Daucus carota
g. Sphingomyelinase D 7. Galerina marginata
h. ⍺-latrotoxin 8. Micrurus fulvius
i. Urushiol 9. Hyoscyamus niger
31. Factors that effect the toxicity of a poison include all except:
a. Duration of exposure
b. Toxicity
c. Temperature
d. Dose
e. Route of exposure
32. A colloid has two phases:
a. stationary, mobile
b. dispersed, continuous
c. dissolution, sedimentation
d. dilution, disassociation
33. The toxicity of isopropanol is about _______________ ethanol.
a. 2.0 times less than
b. 1.2 times less than
c. about the same as
d. 1.2 time more than
e. 2.0 times more than
27. c
28. b
29. T
30. a-6
b-7
c-8
d-9
e-1
f-2
g-3
h-4
I-5
31.c
32.b
33. a(?)
Re: Potions & Poisons B
Posted: March 22nd, 2019, 3:16 pm
by dvegadvol
All good except 33. is 2.0 times more toxic.
Bravo!
Re: Potions & Poisons B
Posted: March 22nd, 2019, 6:31 pm
by Crimesolver
Thanks!
What is the difference between colloid and suspension?
Bronze is a combination of which metals?
T or F - copper is not used in cooking because of its inability to conduct heat evenly
Re: Potions & Poisons B
Posted: March 22nd, 2019, 7:01 pm
by Deathstalker
Crimesolver wrote:Thanks!
What is the difference between colloid and suspension?
Bronze is a combination of which metals?
T or F - copper is not used in cooking because of its inability to conduct heat evenly
1. A colloid is a heterogenous mixture that can pass through a filter, while a suspension cannot.
2. Bronze is a combination of Copper and Tin
3. F
Re: Potions & Poisons B
Posted: March 22nd, 2019, 10:37 pm
by Crimesolver
You forgot the third question
But for now
1. Colloids are actually a homogenous mixture that consists of particles that are permanently suspended, while suspensions are a heterogenous mixture that has particles that settles. Only the suspension can be separated through a filter.
2. Yes
Re: Potions & Poisons B
Posted: March 23rd, 2019, 4:32 am
by Deathstalker
Crimesolver wrote:You forgot the third question
But for now
1. Colloids are actually a homogenous mixture that consists of particles that are permanently suspended, while suspensions are a heterogenous mixture that has particles that settles. Only the suspension can be separated through a filter.
2. Yes
I'm pretty sure Colloids are considered heterogeneous mixtures in most cases.
Re: Potions & Poisons B
Posted: March 23rd, 2019, 9:31 am
by dvegadvol
A colloid is somewhere in between a truly homogeneous mixture and a heterogeneous mixture. At the microscopic level, a colloid is heterogenous. At the macroscopic level it is homogenous. Macroscopically, a colloid shows a single "phase": at this level, it will always have the same composition. But if you look at the microscopic level, you will find that there are at least two different regions, each with a different composition.
The individual particle in a colloid are small enough so that thermal movement (Brownian motion) prevents them from settling to the bottom of a container through gravity, although they can be separated by centrifugation (which is not possible for a true homogeneous mixture). On the other hand, colloids are usually not transparent, as they disperse light because the particles are as large or larger than the wavelength of visible light.
