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2 years ago

In a diamond, what type of bonds link carbon atoms together to form a network solid?

Chemistry

2 answers:

arsen [322]2 years ago

8 0

Oh nice I would have never guessed that lol talking to the comment btw

emmasim [6.3K]2 years ago

4 0

Answer is covalent bonds.

Diamond is a giant covalent structure in which: each carbon atom is joined to four other carbon atoms by strong covalent bonds. the carbon atoms form a regular tetrahedral network structure. there are no free electrons.

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How much energy is released by the decay of 3 grams of 230Th in the following reaction 230 Th - 226Ra + "He (230 Th = 229.9837 g

Serhud [2]

Answer: The energy released for the decay of 3 grams of 230-Thorium is $2.728\times 10^{-15}J$

Explanation:

First we have to calculate the mass defect $(\Delta m)$ .

The equation for the alpha decay of thorium nucleus follows:

$_{90}^{230}\textrm{Th}\rightarrow _{88}^{226}\textrm{Ra}+_2^{4}\textrm{He}$

To calculate the mass defect, we use the equation:

Mass defect = Sum of mass of product - Sum of mass of reactant

$\Delta m=(m_{Ra}+m_{He})-(m_{Th})$

$\Delta m=(225.9771+4.008)-(229.9837)=1.4\times 10^{-3}amu=2.324\times 10^{-30}kg$

(Conversion factor: $1amu=1.66\times 10^{-27}kg$ )

To calculate the energy released, we use Einstein equation, which is:

$E=\Delta mc^2$

$E=(2.324\times 10^{-30}kg)\times (3\times 10^8m/s)^2$

$E=2.0916\times 10^{-13}J$

The energy released for 230 grams of decay of thorium is $2.0916\times 10^{-13}J$

We need to calculate the energy released for the decay of 3 grams of thorium. By applying unitary method, we get:

As, 230 grams of Th release energy of = $2.0916\times 10^{-13}J$

Then, 3 grams of Th will release energy of = $\frac{2.0916\times 10^{-13}}{230}\times 3=2.728\times 10^{-15}J$

Hence, the energy released for the decay of 3 grams of 230-Thorium is $2.728\times 10^{-15}J$

5 0

3 years ago

Calculate the quotient [co32–]/[hco3–] at ph 10.75.

KATRIN_1 [288]

The chemical equation is:

HCO3^ -> H^+ + CO3^2-

We know that the formula for Ka is:
Ka = [H^+][CO3^2-]/[HCO3^-]

log Ka = log[H^+] + log[CO3^2-]/[HCO3^-]
pKa = pH - log[CO3^2-]/[HCO3^-]
log[CO3^2-]/[HCO3^-] = pH - pKa = 10.75 - 10.329 = 0.421
[CO3^2-]/[HCO3^-] = Antilog (0.421) = 2.636

Answer:

2.636

3 0

3 years ago

Chemical reactions can be detected by changes in____. select all that apply. a)temperature.

Elenna [48]

It would be a, b, and d

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3 years ago

Agitation causes the dissolving rate of most solutes to:

Zina [86]

Increase. The particles of the solute are more evenly distributed between the solvent, thus speeding up the process of dissolution.

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3 years ago

What advice would you give a person who handles hydrogen and oxygen in their workplace?

zzz [600]

BE CAREFUL! If it is a controlled lab wear saftey equiptment. But it can blow up. So careful...

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3 years ago