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natulia [17]
3 years ago
6

What are the properties of PLA plastic PLEASE HELP

Chemistry
1 answer:
Zanzabum3 years ago
7 0

Answer:

The Heat Deflection Temperature (HDT) 126 °F (52 °C)

Density 1.24 g/cm³

Tensile Strength 50 MPa

Flexural Strength 80 MPa

Explanation:.

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62 grams of Zn(C2H3O2)4 are dissolved to make a 1.5 M solution. How many milliliters of water are needed?
LenKa [72]
Molarmass of <span>Zn(C2H3O2)4 is 301.5561 g/mol

moles of </span>
<span>Zn(C2H3O2)4
= 62 g * 1 mol/(</span><span>301.5561 g) = 0.2056 mol

concentration = moles / volume
concentration * volume = moles
volume = moles / concentration
volume = 0.2056 mol / 1.5 M
volume = 0.13706 L
volume = 137 mL
volume = 140 mL
</span>


3 0
4 years ago
Read 2 more answers
For the reaction N2(g) + 3H2(g) ↔ 2NH3(g), the equilibrium constant, K, = 9.83 x 10-2 at a certain temperature and pressure.
pshichka [43]

The reaction is not at equilibrium and it is in the forward direction.

a.

Given,

[N₂] = 0.910 mol / L

[H₂] = 0.3 mol / L

[NH₃] = 0.0081 mol / L

K = 9.83 x 10⁻²

The balanced chemical equation for the given reaction is,

N₂(g) + 3H₂(g) ⇄ 2NH₃(g)

The formula of equilibrium constant is given by,

K = [NH₃]² / [N₂] [H₂]²

9.83 x 10⁻² = [(0.0081)² ]/ [0.910 × (0.3)²]

⇒9.83 x 10⁻² = (0.00006561) / (0.0819)

⇒9.83 x 10⁻² = 0.0008010989

⇒0.00983 = 0.0008010989

LHS ≠ RHS

Hence, the reaction is not at equilibrium.

b.

The reaction is in forward direction.

Learn more about direction of the reaction from the link given below.

brainly.com/question/10278602

#SPJ1

4 0
2 years ago
The properties of each state of a substance are due largely to the degree (amount) of intermolecular bonding.
Viktor [21]

Answer:

true

Explanation:

5 0
3 years ago
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Which of these is a property of a substance that is composed of atoms that are held together by ionic bonds
777dan777 [17]

Answer:

It conducts electricity when it is dissolved in water.

Explanation:

It conducts electricity when it is dissolved in water is a property of a substance that is composed of atoms that are held together by ionic bonds.

4 0
3 years ago
After you design your model, build your homes and place them in the same positions as they were in task 1. Build any additional
andreyandreev [35.5K]
Good luck hope you find it
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