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frez [133]
2 years ago
6

What is one takeaway you have about future sea levels rising ?

Chemistry
2 answers:
Galina-37 [17]2 years ago
7 0

Answer:

Our world will never be the same. Our beaches will be submerged, many towns, cities, states, and even countries will be partially if not completely submerged. All these human cities being flooded will kill thousands of people, pollute the ocean, and lose billions of dollars.

Explanation:

jonny [76]2 years ago
5 0
Based on their new scenarios, global sea level is very likely to rise at least 12 inches (0.3 meters) above 2000 levels by 2100 even on a low-emissions pathway. On future pathways with the highest greenhouse gas emissions, sea level rise could be as high as 8.2 feet (2.5 meters) above 2000 levels by 2100
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Why glucose and fructose produce same shaped products with phenylhydrazine?
NemiM [27]

During the reaction of glucose and fructose with excess phenylhydrazine to form osazone, only the C-1andC-2 atoms of glucose and fructose participate in the reaction. The rest of the molecule remains intact. Hence, glucose and fructose produce the same osazone.

6 0
2 years ago
Us
MrRissso [65]

Answer:

24.9%

Explanation:

According to this question, mole fraction of NaCl in an aqueous solution is 0.0927. This means that the mole percent of NaCl in the solution is:

0.0927 × 100 = 9.27%

Let's assume that the solution contains water (solvent) + NaCl (solute), hence, the mole fraction of water will be;

100% - 9.27% = 90.73%

THEREFORE, it can be said that, NaCl contains 0.0927moles while H2O contains 9.073moles

N.B: mole = mass/molar mass

Given the Molar Mass

NaCl: 58.44 g/mol

H2O: 18.016 g/mol

For NaCl;

0.0927 = mass/58.44

mass = 0.0927 × 58.44

5.42g

For H2O;

9.073 = mass/18.016

mass = 9.073 × 18.016

= 16.35g

Total mass of solution = 16.35g + 5.42g = 21.77g

Mass percent of NaCl = mass of NaCl/total mass × 100

% mass of NaCl = 5.42g/21.77g × 100

= 0.249 × 100

= 24.9%

5 0
3 years ago
Read 2 more answers
5. Acid + Metal → a Salt + _______
aliya0001 [1]
The answer is Hydrogen

This is what happens when acids react with metals
5 0
3 years ago
Read 2 more answers
20 POINTSSS PLS HELP! Which of the following things threaten our fresh water supply? Check all that apply.
joja [24]
Fertilizer use the run on can go into fresh water
3 0
3 years ago
Read 2 more answers
Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. △ H°(kJ) K(s) → K(g) 89 K(g)
Gelneren [198K]

Answer:

This is the value for the electron affinity = -339.8 kJ

Review the problem because it is possibly wrong and there are also incomplete or erroneous data

Explanation:

First of all,  you have to think the chemical reaction, based on the elements in their ground state.

K(g) + 1/2 Br₂ (l) → KBr

How do we find bromine or potassium in nature? Br₂  as gas, K as liquid.

For this reaction, we use △Hf (kJ) = -394 (formation enthalpy)

The reaction is then defined from the elements in the gaseous state, to form the crystals of the salt, so Br and K have to change state. At the end, the equation will be:

K⁺(g) +  Br⁻(g)  → KBr    This process used the energy called, lattice energy.

LE = -674 kJ.

So we have to go, from K(s) to K⁺(g), and from Br₂(l) to Br⁻(g).

First of all, we have to convert K(s)  → K(g)  with △Hsublimation: 89kJ

And then  tear out an electron to form the cation, with the ionization energy K(g)  → K⁺(g) + 1e⁻    △H: 419 kJ

In first place, we have to convert Br₂(l) to Br₂(g) with a vaporization process. For this: Br₂(l) → Br₂(g)    △H: 30.7 kJ <u>(THIS VALUE IS MISSING AND IT IS WRONG IN WHAT YOU WROTE)</u>

Notice we have, a half of 1 mol of bromine, so we have to convert a half of 1 mol, so we need a half of energy. The enthalpy vaporization is for 1 mol of Br₂, but we only have a half.

Aftewards, we have to separate the 1/2Br₂(g). As this is a dyatomic molechule, we need only 1 Br.

<em>DEFINETALY THERE IS MISTAKE ON WHAT YOU WROTE BECAUSE THIS VALUE IS INCORRECT IN THE STATEMENT.</em>

You use the enthalpy for dissociation to have this Br-Br. You must break the bond. △H = 193/2 kJ

And as you have 1/2 mol, you need 1/2 of energy

Now we have to apply, the electron affinity, to get the bromide anion.

1/2Br₂(g)  +  1e-  →  Br⁻ (g)     △H: ?

This is the unknown value.

How do you make the Born Haber cycle? The Sum all the △H + LE = △Hf

LE + △Hs + △Hie + △Hv + △Hdis  + EA = -394 kJ

EA = -394kJ - LE - △Hs - △Hie - △Hv - △Hdis

EA = -394kJ + 674 kJ - 89kJ - 419 kJ - 30.7/2 kJ - 193/2 kJ

EA = -339.8 kJ

6 0
3 years ago
Read 2 more answers
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