1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
erik [133]
2 years ago
15

If the Earth is round... why is the land flat?

Chemistry
2 answers:
777dan777 [17]2 years ago
6 0

The land isn't actually flat. With so many hills and mountains it would be hard to tell. We are also to small to notice the land is slightly curved

stiv31 [10]2 years ago
4 0

Answer:

See explanation

Explanation:

The land around us appears flat because the Earth is just so unimaginably large, and the curvature is extremely small from our point of view. In reality, the land is slightly bendy, which is why certain structures (like very long bridges) need to be constructed with the curvature in mind, with different ends at slightly different elevations. Hope this helps!

You might be interested in
Glycolic acid, which is a monoprotic acid and a constituent in sugar cane, has a pKa of 3.9. A 25.0 mL solution of glycolic acid
Phoenix [80]

Answer:

pH = 8.0

Explanation:

First, we have to calculate the moles of NaOH.

35.8 \times 10^{-3}L.\frac{0.020mol}{L} =7.2\times 10^{-4}mol

Let's consider the balanced equation.

C₂H₄O₃ + NaOH ⇒ C₂H₃O₃Na + H₂O

The molar ratio C₂H₄O₃: NaOH: C₂H₃O₃Na is 1: 1: 1. So, when 7.2 × 10⁻⁴ moles of NaOH react completely with 7.2 × 10⁻⁴ moles of C₂H₄O₃ they form 7.2 × 10⁻⁴ moles of C₂H₃O₃Na.

The concentration of C₂H₃O₃Na is:

\frac{7.2\times 10^{-4}mol}{60.8 \times 10^{-3}L} =0.012M

C₂H₃O₃Na dissociates according to the following equation:

C₂H₃O₃Na(aq) ⇒ C₂H₃O₃⁻(aq) + Na⁺(aq)

C₂H₃O₃⁻ comes from a weak acid so it undergoes basic hydrolisis.

C₂H₃O₃⁻ + H₂O ⇄ C₂H₄O₃ + OH⁻

If we know that pKa for C₂H₄O₃ is 3.9, we can calculate pKb for C₂H₃O₃⁻ using the following expression:

pKa + pKb = 14

pKb = 14 -3.9 = 10.1

10.1 = -log Kb

Kb = 7.9 × 10⁻¹¹

We can calculate [OH⁻] using the following expression:

[OH⁻] = √(Kb.Cb)               <em>where Cb is the initial concentration of the base</em>

[OH⁻] = √(7.9 × 10⁻¹¹ × 0.012M) = 9.7 × 10⁻⁷ M

Now, we can calculate pOH and pH.

pOH = -log [OH⁻] = -log (9.7 × 10⁻⁷) = 6.0

pH + pOH = 14

pH = 14 - pOH = 14 - 6.0 = 8.0

7 0
2 years ago
The following equation is balanced according to the Law of Conservation of Mass:
igor_vitrenko [27]
The answer would be:
True
6 0
2 years ago
Which of the following is not an example of a pure element?
motikmotik
Copper wire is not an example of a pure element because although it's made by pure elements, it's not one itself. It's made by factories.

Have a nice day! :)
8 0
3 years ago
Read 2 more answers
What is the most simplified meaning within a language?
AysviL [449]

The most simplified meaning within a language is MORPHEME.

In English language, a morpheme refers to a language unit, that is made up of a word or a word elements which can not be further broken down into meaningful smaller parts. Morphemes are the smallest, basic, grammatical unit of a language that have distinct meaning, just as atoms are the smallest unit of elements in chemistry. Examples of morphemes are: sad, joy, depress, excited, etc.

3 0
3 years ago
Read 2 more answers
What is the noble gas electron configuration of aluminum (Al)? A. [Ne] 3s2 3p1 B. [Ne] 2s2 2p1 C. [Ar] 3s2 3p1 D. [Ar] 1s2 2s2 2
Gekata [30.6K]

[Ne] 3s2 3p1  So its A

6 0
3 years ago
Read 2 more answers
Other questions:
  • The escape of gas through a small hole in a container
    6·1 answer
  • Hydrazine, N2H4, may react with oxygen to form nitrogen gas and water.N2H4(aq) + O2(g) -&gt; N2(g) + 2H2O(l)If 3.95 g of N2H4 re
    7·2 answers
  • What do you think is the most important element and why? Include information
    6·1 answer
  • What are the reactants in a neutralization reaction? two elements an acid and a base an element and a compound a salt and water
    14·2 answers
  • 4. What coefficients need to be added to the following chemical reaction
    15·1 answer
  • When sunlight passes through a prism, the different wavelengths separate into a(n)________ of colors.
    5·2 answers
  • The p-value of a statistical test depends on all of the following, except:
    7·1 answer
  • PLEASE HELP MEEE!!!!!!!!!
    14·1 answer
  • A rarefraction is generated when particles move<br> A:together<br> B.closer <br> C.under<br> D.apart
    6·1 answer
  • Can someone help me please. Will mark brainliest!<br> Which equation shows an increase in entropy?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!