Explain the four basic types of chemical reactions. Be sure to include a sample equation for each type.

The following sets of quantum numbers ( n, I, ml, ms ) that cannot occur within an atom of gallium are :

Given that

Ga ( 31 ) = 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p¹

                 [ 4r ] 3d¹⁰ 4s²4p¹

where : n = principal quantum numbers,  l = azimuthal quantum numbers, ml = magnetic quantum numbers, ms = spin quantum numbers.

For option B

Given that 4d shell is absent for Gallium the set cannot occur within the atom of Gallium

For Option D and E

All quantum number cannot occur here because the value of l = 2 for option D while for option E the value of l = 3

Hence we can conclude that sets of quantum numbers ( n, I, ml, ms ) that cannot occur within an atom of gallium are as listed above.

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From the equation of te reaction, we know that the mass percent  of NaOH in the mixture is 1.4%.

Neutralization is a reaction that occurs between an acid and a base to yield salt and water only.

In tis case, the reaction of the NaOH and HCl occurs as follows; NaOH + HCl ----> NaCl + H2O

Number of moles of HCl reacted = 15/1000 * 0.5 moldm-³ = 0.0075 moles

Since the reaction is 1:1, 0.0075 moles of NaOH reacted.

Mass of NaOH =  0.0075 moles of NaOH * 40 g/mol = 0.3 g

Percent of NaOH = 0.3 g/21.10g * 100/1 = 1.4%

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Answer:

.926 moles

Explanation:

Rounding :

H2 0 = 18 gm/mole

   50 gm would then be   50 / 18 = 2.7777 moles of water

every two moles of 2 C6H6   produces   6 moles of water

   2.7777/6  * 2 = .926 moles

Answer:When ethanol is oxidised with alkaline potassium permanganate (alkaline KMnO 4) or acidified potassium dichromate (acidified K 2 Cr 2 O 7), ethanoic acid is formed. Alkaline potassium permanganate and acidified potassium dichromate are strong oxidising agents, as they provide oxygen for oxidising other substances in the reaction

Explanation:

Answer:

9.03*10^23 molecules CH4

Explanation:

In the equation CH4 + O2 -> CO2 + 2H2O, the molar ratio of CH4 to CO2 is 1:1. It takes 1 mole of CH4 burned to form 1 mole of CO2. If we convert molecules to moles, we do 9.03 x 10^23 divided by 6.02 x 10^23 = 1.5 moles of CO2. Since we know the ratio is 1:1, that meant it would take 1.5 moles of CH4 burned to make that much CO2. So we convert our 1.5 moles of CH4 into molecules by multiplying 1.5 * 6.02 x 10^23 which equals 9.03*10^23 molecules CH4.

According to the image in this question, the type of reaction shown is that of fission because nuclei are being split into smaller and smaller places.

Nuclear fission in radioactivity is the process whereby the nuclei of atoms split into smaller particles.

In the above diagram, an atom of uranium is labeled and its nucleus is shown to split into smaller particles in succession.

Therefore, the reaction exemplifies a nuclear fission because nuclei are being split into smaller and smaller places.

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Answer:

15 atoms left after 3 half lives

Explanation:

17145 y / 5715 y/halflife = 3 half lives

(1/2)^3 = 1/8 of original is left

1/8 ( 120 atoms) = 15 atoms left

Answer:

You gain sodium basically through the food you eat and lose it basically by excretion through urine,sweat

Answer:

Scientists discovered that when the locations of earthquakes were plotted on a world map, these locations occurred in a pattern, or variety of patterns.

Explanation:

The compound that is most likely present when treated with bromine and the sample absorbs the red bromine color is ; Cycloheptene

Cycloheptene is an unsaturated colorless oily liquid which is insoluble in water it absorbs Bromine when used in performing unsaturation test due it unsaturated nature.

The red bromine color will be absorbed when used to treat Cycloheptene but will not be absorbed when used to treat cycloheptane due to its saturated nature.  

Hence we can conclude that the compound that is present is Cycloheptene.

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Answer:

I think its this 4.125 g Na2SO4 or this 4.125 g

Answer:

[tex]\fbox{Law -Based \: on \: laws \: of \: thermodynamic}[/tex]

Explanation:

At constant pressure Thermal energy always moves from a greater energy level to a lesser energy level, laws of thermodynamics prove that.

Nature always likes to attain equilibrium either it's movement of heat energy or flow of water from higher region to lower region. The first and second law of thermodynamics are profe of that, the first law says that the total energy of universe is Constant. Energy can not be destroyed it always changes from one form to another, by work and heat. The second law explains why thermal energy moves from a greater energy level to a lesser energy level, it deals with the change in entropy of a system and surrounding and states heat flows from hot environment to cold environment.

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Answer:

Particles in the liquid state have greater IM attractive forces than in the gas state.

Answer:

12 or 1.24e

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Answer:

Explanation:

w = 16.0KJ

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