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Vedmedyk [2.9K]
4 years ago
7

Which is the first element in the periodic table to have an electron configuration in the 4th energy level?

Chemistry
2 answers:
Tju [1.3M]4 years ago
7 0
The answer is potassium:)
solong [7]4 years ago
4 0

The answer is potassium .......

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How will the reaction rate of the SN1 reaction change if the electrophile is switched from the tertiary electrophile to a second
lions [1.4K]

The reaction rate of the SN1 reaction change if the electrophile is switched from the tertiary electrophile to a secondary electrophile will decrease.

SN1 exhibits substitution, nucleophilicity, and monomolecular reaction, and is expressed by the expression rate = k [R-LG]. This means that the rate-determining step of the mechanism depends on the degradation of a single molecular species. Multi-step reactions include intermediates and multiple transition states (TS).

The SN1 reaction is a nucleophilic substitution reaction in which the nucleophile replaces the leaving group (similar to SN2). However, the SN1 reaction is a single molecule. The rate of this reaction depends on the concentration of only one reactant.

Learn more about reaction rate  here: brainly.com/question/7578129

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8 0
2 years ago
Calculate the root mean square velocity of F2,Cl2, and Br2 at 304 K .
Artist 52 [7]
<span>The root mean square velocity of gas molecules as a function of temperature is (M is molecular weight): 
v²rms = 3RT/M, 
and kinetic energy is given by: 
KE = ½Mv ² 
We can make the substitution: 
KE = ½M3RT/M, or 
KE = (3/2)RT. 
Notice the molecular weight variable is gone; that means the answer will be the same for F2, Cl2, and Br2: 
KE = (3/2) (8.314 J/K*mole) (290 K) = 3617 J/mole.</span>
5 0
3 years ago
Complete and balance the following:(b) Sb₂O₃(s) + NaOH(aq) →
sammy [17]

Sodium tritioantimonate(III) and water are the products of the reaction between antimony(III) oxide and sodium hydroxide.

Sb2O3(s)+NaOH(aq)→Na3SbO3(aq)+H2O(l)

Balance the reaction from antimony, sodium, then hydrogen and oxygen.

Sb2O3(s)+6NaOH(aq)→2Na3SbO3(aq)+3H2O(l)

The equation is already balanced.

When each element in a chemical reaction has the same number of atoms and total charge on both the reactants and product sides of the equation, the reaction is said to be balanced. In other words, both sides of the reaction have an equal mass and charge of the components.

Because a chemical reaction is simply an arrangement of the atoms of the supplied elements, a chemical equation must be balanced. For the law of conservation of mass to be followed, the chemical equation must be balanced.

Learn more about chemical reaction  here:

brainly.com/question/3461108

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3 0
1 year ago
Huge Stars are how many times more (in mass) than our sun?
xenn [34]
The answer should be answer B. More than three times the sun. I hope this helped! :)))




5 0
3 years ago
hydrogen-2 is also known as deuterium as well as hydrogen-3 is known as tritium hydrogen-1 is our common hydrogen isotope a samp
UkoKoshka [18]
H-1 only has 1 proton and 1 electron, so its mass number is 1.
H-2 has one more neutron so its mass number is 2
H-3 has one more neutron than H-2 so its mass number will be 3.
average atomic mass = 1 x 99% + 2 x 0.8% + 3 x 0.2%
=1.012
6 0
4 years ago
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