Answer:
there are no valence electrons left over, so the molecule has four bond pairs and no lone pairs.
Explanation:
Answer:
10 moles of SO₂ are produced when 5 moles of FeS₂
Explanation:
Stoichiometry: it is the theoretical proportion in which the chemical species are combined in a chemical reaction. The stoichiometric equation of a chemical reaction relates molecules or number of moles of all the reagents and products that participate in the reaction.
In other words, stoichiometry establishes relationships between the molecules or elements that make up the reactants of a chemical equation with the products of said reaction. The relationships established are molar relationships (that is, moles) between the compounds or elements that make up the chemical equation.
The stoichiometric coefficients of a chemical reaction indicate the proportion in which said substances react.
Taking into account the above, you can apply the following rule of three: by stoichiometry if 4 moles of FeS₂ produce 8 moles of SO₂, then when reacting 5 moles of FeS₂ how many moles of SO₂ will they produce?
moles of SO₂= 10
<u><em>10 moles of SO₂ are produced when 5 moles of FeS₂</em></u>
Answer:
The energy difference between these 2p and 2s orbitals is 
Explanation:
Wavelength of the photon emitted = 
Energy of the photon will corresponds to the energy difference between 2p and 2s orbital = E
Energy of the photon is given by Planck's equation:
h = Planck's constant = 
c = Speed of the light = 
The energy difference between these 2p and 2s orbitals is
Answer:
a) the wet density of the CL sample is 0.0453 lb/in³
b) the water content in the sample is 65.37%
c) the dry density of the CL sample is 0.0274 lb/in³
Explanation:
Given that;
diameter d = 2.83 in
length L = 6 in
weight m = 1.71 lbs
A piece of clay sample had wet-weight of 140.9 grams and dry-weight of 85.2 grams
a) wet density of the CL sample
wet density can be expressed as p = M /v
V is volume of sample which is; π/4×d²×L
so p = M / π/4×d²×L
we substitute
p = 1.71 / (π/4 × (2.83)²× 6
p = 1.71 / 37.741
p = 0.0453 lbs/in³
so the wet density of the CL sample is 0.0453 lb/in³
b)
water content of sample is taken as;
w = (wet_weight - dry_weight) / dry_weight
we substitute
w = (140.9 - 85.2) / 85.2
w = 55.7 / 85.2
w = 0.6537 = 65.37%
therefore the water content in the sample is 65.37%
c)
dry density of the CL sample
to determine the dry density, we say;
Sd = p / ( 1 + w )
we substitute
Sd = 0.0453 / ( 1 + 0.6537)
Sd = 0.0453 / 1.6537
Sd = 0.0274 lb/in³
therefore the dry density of the CL sample is 0.0274 lb/in³
<u>answer</u> 1<u> </u><u>:</u>
Law of conservation of momentum states that
For two or more bodies in an isolated system acting upon each other, their total momentum remains constant unless an external force is applied. Therefore, momentum can neither be created nor destroyed.
<u>answer</u><u> </u><u>2</u><u>:</u><u> </u>
When a substance is provided energy<u> </u>in the form of heat, it's temperature increases. The extent of temperature increase is determined by the heat capacity of the substance. The larger the heat capacity of a substance, the more energy is required to raise its temperature.
When a substance undergoes a FIRST ORDER phase change, its temperature remains constant as long as the phase change remains incomplete. When ice at -10 degrees C is heated, its temperature rises until it reaches 0 degrees C. At that temperature, it starts melting and solid water is converted to liquid water. During this time, all the heat energy provided to the system is USED UP in the process of converting solid to the liquid. Only when all the solid is converted, is the heat used to raise the temperature of the liquid.
This is what results in the flat part of the freezing/melting of condensation/boiling curve. In this flat region, the heat capacity of the substance is infinite. This is the famous "divergence" of the heat capacity during a first order phase transition.
There are certain phase transitions where the heat capacity does not become infinitely large, such as the process of a non-magnetic substance becoming a magnetic substance (when cooled below the so-called Curie temperature).
