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ikadub [295]
3 years ago
6

What is the name for the new technology that works on the atomic or molecular level?

Chemistry
1 answer:
Dahasolnce [82]3 years ago
5 0
I believe it's A. Nanotechnology.
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This is basic chemistry btw.<br> screen shoted it
mr_godi [17]
B) Metalloid because that's a mixture of the other two.
5 0
3 years ago
When completing an experiment, results will be much more accurate if multiple trials are completed and the results averaged. TRU
grandymaker [24]
<span>When completing an experiment, results will be much more accurate if multiple trials are completed and the results averaged. True. That's because you may get different results each time. </span>
5 0
3 years ago
Read 2 more answers
Calculate AS° for the reaction below: N2(g)+202(g) 2NO2(g) where ASo for N2(g), O2(g), &amp; NO2(g), respectively, is 191.5, 205
nignag [31]

Answer:

ΔS Rx = -120, 5 J/K

Explanation:

The ΔS in a reaction is defined thus:

ΔS Rx = ∑ n S°products - ∑ m S°reactants

For the reaction:

N₂(g) + 2 O₂(g) → 2NO₂(g)

ΔS Rx = 2 mol × 240,5 \frac{J}{mol.K} - [ 1 mol × 191,5 \frac{J}{mol.K} + 2 mol × 205,0 \frac{J}{mol.K}]=

<em>ΔS Rx = -120, 5 J/K</em>

A negative value in ΔS means a negative entropy of the process. Doing this process entropycally unfavorable.

I hope it helps!

5 0
3 years ago
In a coffee-cup calorimeter, 50.0ml of 0.100M AgNO3 and50.0ml of 0.100M HCl are mixed to yield the following reaction:
Marina CMI [18]

Answer:

-66.88KJ/mol

Explanation:

It is possible to obtain the heat involved in a reaction using a calorimeter. Formula is:

q = -C×m×ΔT

<em>Where q is heat of reaction, C is specific heat capacity (4.18J/°Cg), m is mass of solution (100.0g) and ΔT is temperature change (23.40°C-22.60°C = 0.80°C)</em>

Replacing:

q = -4.18J/°Cg×100.0g×0.80°C

q = -334.4J

Now, in the reaction:

Ag⁺ + Cl⁻→ AgCl

<em>AgNO₃ as source of Ag⁺ and HCl as source of Cl⁻</em>

Moles that react are:

0.050L× (0.100mol /L) = 0.0050moles

If 0.0050 moles produce -334.4J. Heat of reaction is:

-334.4J / 0.0050moles = -66880J/mol = <em>-66.88KJ/mol</em>

5 0
3 years ago
Which of the following are isotopes, choose all that apply.
Juliette [100K]

Answer:

Element X with atomic number 10 and atomic mass 21

Element Z with atomic number 10 and atomic mass 22

Explanation:

Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the number of neutrons in their various nuclei.

  • Isotopes of an element have the same electronic configuration.
  • They share the same chemical properties
  • They only differ in their masses.

So, Element X and Z with atomic number 10 which is their number of electrons are isotopes. Their mass number, 21 and 22 differs.

4 0
3 years ago
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