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Tomtit [17]
2 years ago
6

Does anyone know why electron affinity increases as going upward in the periodic table ​

Chemistry
1 answer:
kobusy [5.1K]2 years ago
6 0

Answer:

Electron affinity increases upward for the groups and from left to right across periods of a periodic table because the electrons added to energy levels become closer to the nucleus, thus a stronger attraction between the nucleus and its electrons.

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Which of these is a rough approximation of the cogito?
ratelena [41]

Given the Latin meaning of the cogito, we can confirm that it is roughly translated and summarized by the phrase <em><u>"I think, therefore I am"</u></em>.

Cogito, ergo sum or "The Cogito" is an extremely popular, well-known philosophical phrase credited to <em><u>Rene Descartes</u></em>. This Latin phrase is roughly translated as <em><u>"I think, therefore I am"</u></em>, which appeared originally in "The Principles of Philosophy", and was later translated to a variety of languages in an attempt to reach a wider public, most notably into Latin.

To learn more visit:

brainly.com/question/16853649?referrer=searchResults

4 0
2 years ago
What is the boiling point of a solution of 12.0 g of urea in 165.0 g of water
Nat2105 [25]

Answer:

T = 100.63 °C

Explanation:

To solve this question, we need to know what are we talking about here. In this case, we want to know the boiling point of a solution with Urea in water. This is a colligative property, so, the expression to use to calculate that is the following:

ΔT = m * K / MM * kg water (1)

Where:

ΔT: difference of temperatures (Tb of solution - Tb water)

m: mass of the urea

K: ebulloscopic constant of the water (0.52 ° C / m)

MM: molecular mass of urea

The boiling point of water is 100 °C, we have the mass of the urea, but not the molar mass. The urea has the formula CH₄N₂O, so the molar mass can be calculated using the atomic mass of the elements (I will use a rounded number for this):

MM = 12 + (4*1) + (2*14) + 16 = 60 g/mol

Now, we can calculate the ΔT and then, the boiling point of the solution:

ΔT = 12 * 0.52 / 60 * 0.165

ΔT = 6.24 / 9.9

ΔT = 0.63 °C

the value of ΔT is a difference between the boling point of water and the solution so:

ΔT = Ts - Tw

Ts = ΔT + Tw

Replacing we have:

Ts = 100 + 0.63

<h2>Ts = 100.63 ° C</h2>
8 0
3 years ago
30 POINTS MATCH THE DEFINITIONS PLEASE, ITS PROBABLY EASY FOR U THO
TiliK225 [7]

Answer:

(going down the line)

1. matter

2. hypothesis

3. energy

4. independent variable

5.  theory

6. quantitative data

7. dependent variable

8. constant

9. law

10. qualitative data

Explanation:

5 0
3 years ago
PLS HELP ASAP NO LINKS WILL MARK BRAINLIEST IF CORRECT
patriot [66]

Answer:Strontium-90 and cesium-137 have half-lives of about 30 years (half the radioactivity will decay in 30 years). Plutonium-239 has a half-life of 24,000 years. High-level wastes are hazardous because they produce fatal radiation doses during short periods of direct exposure.

Explanation:

6 0
3 years ago
Read 2 more answers
Calculate q, the heat released in each reaction.
goldenfox [79]

First Set of Answers:

Heat Released Reaction 1: 3700

Heat Released Reaction 2: 3200

Second Set of Answers:

Moles Reactant 1: .00823

Moles Reactant 2: .0397

Third Set of Answers:

Enthalpy 1: -450

Enthalpy 2: -81

FOR EDG!!!!!!!!!!!!

( Record in your data table (; )

8 0
2 years ago
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