PROPOSED EXERCISE ITEM 4
Three solid substances are available: A, B and C. Following a procedure and using the material and
instruments, water solubility, conductivity, and conductivity are experimentally tested
melting temperature of each of the substances resulting in the following results:
-Substance A is insoluble in water, its melting point is low and does not conduct electricity.
- Substance B is insoluble in water, its melting point is very high (we have not managed to melt it)
and drives the electricity.
- Substance C is water soluble, its melting point is high and conducts electric current when
dissolved in water and melted but not in solid state.
a) Based on the data obtained, it classifies substances A, b and C into ion, covalent (molecular or
crystalline) or metallic.
b) Cites an example of each of these substances that corresponds to everyday products.
c) In the case of the ion substance you have proposed, describe the ion formation process
helping you with a representation (drawing) and periodic table to make electronic setup.
d) Classifies the substances you have chosen into elements or compounds and calculates their molecular masses
Corresponding. (Calculation must appear)
Answers: 3
Chemistry, 22.06.2019 11:00, Usman458
The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?
Answers: 1
Chemistry, 22.06.2019 12:30, pup88
According to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? view available hint(s) according to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? trigonal bipyramidal tetrahedral square planar determination of electron geometry requires information on whether the electron groups are lone pairs or bonding groups.
Answers: 2
Chemistry, 22.06.2019 23:00, lufung8627
Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]
Answers: 1
PROPOSED EXERCISE ITEM 4
Three solid substances are available: A, B and C. Following a procedure an...
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