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rosijanka [135]
3 years ago
13

Which environmental changes occur faster?

Chemistry
1 answer:
Volgvan3 years ago
7 0
The environmental change that occurs faster is definitely volcanic eruption. It may happen in an instant and destroy everything in its way, whereas the process of regrowth of forest after volcanic eruption is a slow one.
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Describe the trends in electron configuration in the periodic table by selecting the terms from the drop-down menus.
Fittoniya [83]

Increases

Stays the same

s-orbitals

d-orbitals

p-orbitals

Explanation:

The trend in the electronic configuration on the periodic table follows a definite pattern because the arrangement of elements on the table is based on the periodic law.

The periodic law states that "The properties of elements are a function of their atomic number".

  • Elements in the same horizontal period have increasing number of valence electrons.
  • The number of valence electrons stays the same down a group.
  • Groups 1 and 2 are known as the s-block and electrons are added to the s-orbitals for them.
  • Groups 3 to 12 is the transition block and electrons the valence d-orbital.
  • Groups 3 through 18 is the p-block where the valence shell is the p-orbital.

learn more:

Periodic table brainly.com/question/8543126

#learnwithBrainly

7 0
3 years ago
Read 2 more answers
Lead melts at 328 ℃. How much heat is required when 23.0 g of solid lead at 297 K condenses to a liquid at 702 K?
son4ous [18]

Heat = 1.74 kJ

<h3>Further explanation</h3>

Given

melts at 328 ℃ + 273 = 601 K

mass = 23 g = 0.023 kg

initial temperature = 297 K

Final tmperature = 702 K

Required

Heat

Solution

1. raise the temperature(297 to 601 K)

c of lead = 0.130 kJ/kg K

Q = 0.023 x 0.13 x (601-297)

Q = 0.909 kJ

2. phase change(solid to liquid)

Q = m.Lf (melting/freezing)

Q = 0.023 x 23 kj/kg = 0.529 kJ

3. raise the temperature(601 to 702 K)

Q = 0.023 x 0.13 x (702-601)

Q = 0.302 kJ

Total heat = 1.74 kJ

7 0
3 years ago
Can somebody help me with this problem
Helen [10]
Im going with c hope this helps
5 0
4 years ago
For this heterogeneous system 2 A ( aq ) + 3 B ( g ) + C ( l ) − ⇀ ↽ − 2 D ( s ) + 3 E ( g ) the concentrations and pressures at
maw [93]

Answer:

2.55*10^{11

Explanation:

Equation for the heterogeneous system is given as:

2A_{(aq)}  + 3 B_{(g)} + C_{(l)}      ⇄      2D_{(s)}    +     3E_{(g)}

The concentrations and pressures at equilibrium  are:

[A] = 9.68*10^{-2}M

P_B = 9.54*10^3Pa

[C]=14.64M

[D]=10.11M

P_E=9.56*10^4torr

If we convert both pressure into bar; we have:

P_B = 9.54*10^3Pa

P_B = (9.54*10^3)*\frac{1}{10^5} bar

P_B=9.54*10^{-2}bar

P_E=9.56*10^4torr

1 torr = 0.001333 bar

9.54*10^4 *0.001333 = 127.5 bar

K=\frac{[P_E]^3}{[A]^2[P_B]^3}

K=\frac{(127.5)^3}{(9.68*10^{-2})^2(9.54*10^{-2})^3}

K=2.55*10^{11

3 0
3 years ago
What is the standard units of mass, length and time in the (a) CGS system (b) SI system​
Ede4ka [16]

Explanation:

a. CGS system: centimetre as the unit of length, the gram as the unit of mass, and the second as the unit of time

b. SI system: metre as the unit of length, the kilogram as the unit of mass, and the second as the unit of time

8 0
3 years ago
Read 2 more answers
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