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coldgirl [10]
2 years ago
8

PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP

Chemistry
1 answer:
vivado [14]2 years ago
8 0

Answer:

not sure about it .I also need an answer

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Please give me the reasons of the solution!
irinina [24]

1. The answer is option E, that is None of the above is correct.

As a polymer becomes more crystalline,

its melting point doesn't decreases, its density doesn't decreases, its stiffness doesn't decreases and its yield stress doesn't decreases.

2. The answer is option B, that is the molecules are arranged in sheets, with their long axes parallel and their ends aligned as well.

In the smectic A liquid-crystalline phase, molecules are arranged in sheets, with their long axes parallel and their ends aligned as well.

3.  For a substitutional alloy to form, the two metals combined must have similar atomic radii and chemical bonding properties.

6 0
3 years ago
Why do elements have different<br> properties?
Ann [662]
I think because each element has its own number of protons and neutrons, giving it its own atomic number and mass (correct me if I’m wrong please)
3 0
2 years ago
Lithium iodide has a lattice energy of −7.3×102kJ/mol and a heat of hydration of −793kJ/mol. Find the heat of solution for lithi
Anna007 [38]
Delta H of solution = -Lattice Energy + Hydration 
<span>Delta H of solution=- (-730)+(-793) </span>
<span>Delta H of solution= -63kJ/mol </span>

<span>Now we find moles of LiI: </span>
<span>10gLiI/133.85g=.075moles </span>
<span>multiply moles to the delta H of solution to cross cancel moles. .75moles x -64kJ/mol =4.7</span>
7 0
3 years ago
Read 2 more answers
When 5.0 mol Al react with 13 mol HCl, what is the limiting reactant, and how many moles of AlCl3 can be formed? 2Al + 6HCl → 2A
bekas [8.4K]
HCI is the limiting reactant, and 4.3 mol AICI3 can be formed.
6 0
3 years ago
List two things in your environment that your body would need to adjust to
olchik [2.2K]

Answer:

Temperature & Humidity

Explanation:

If the body could not adapt to these changes, we wouldn't be able to live all over the planet; from the equator up to the polar caps.

6 0
3 years ago
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