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3 years ago

What is the name of the ionic compound CaO?

Chemistry

1 answer:

Nata [24]3 years ago

4 0

Answer:

Calcium Oxide.

Explanation:

Ca + O = CaO.

Calcium + Oxygen = Calcium Oxide.

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g An oxidized silicon (111) wafer has an initial field oxide thickness of d0. Wet oxidation at 950 °C is then used to grow a thi

77julia77 [94]

Answer:

Explanation:

From the information given:

oxidation of oxidized solution takes place at 950° C

For wet oxidation:

The linear and parabolic coefficient can be computed as:

$\dfrac{B}{B/A} = D_o \ exp \Big [\dfrac{-\varepsilon a}{k_BT} \Big]$

Using $D_o$ and $E_a$ values obtained from the graph:

Thus;

$\dfrac{B}{A} = 1.63 \times 10^8 exp \Big [ \dfrac{-2.05}{8.617 \times 10^{_-5}\times 1173}\Big] \\ \\ = 0.2535 \ \ \mu m/hr$

$B= 386 \ exp \Big [-\dfrac{0.78}{8.617 \times 10^{-3} \times 1173} \Big] \\ \\ = 0.1719 \ \mu m^2/hr$

So, the initial time required to grow oxidation is expressed as:

$t_{ox} = \dfrac{x}{B/A}+ \dfrac{x^2}{B} - t_o (initial)$

$where; \\ \\ t_{ox} = 2 \ hrs;\\ \\ x = 0.5 \\ \\ B/A = 0.2535 \\ \\ B = 0.1719$

∴

$2= \dfrac{0.5}{0.2535}+ \dfrac{0.5^2}{0.1719} - t_o (initial)$

$2 = 3.4267 - t_o (initial) \\ \\ t_o(initial) = 3.4267 - 2 \\ \\ t_o(initial) = 1.4267 \ hr$

NOW;

$1.4267 = \dfrac{d_o}{0.2535} + \dfrac{d_o^2}{0.1719} \\ \\ 1.4267 = 3.9448 \ d_o + 5.8173 \ d_o^2 \\ \\ d_o^2 + 0.6781 \ d_o = 0.2453$

$d_o = \dfrac{-b \pm \sqrt{b^2-4ac}}{2a}$

$d_o = \dfrac{-(0.6781) \pm \sqrt{(0.6781)^2-4(1)(-0.245)}}{2(10)}$

$d_o = \dfrac{-(0.6781) \pm \sqrt{0.45981961+0.98}}{20}$

$d_o = \dfrac{-(0.6781) \pm \sqrt{1.43981961}}{20}$

$d_o = \dfrac{-(0.6781) + \sqrt{1.43981961}}{20} \ OR \ \dfrac{-(0.6781) - \sqrt{1.43981961}}{20}$

$d_o =0.02609 \ OR \ -0.0939$

Thus; since we will consider the positive sign, the initial thickness $d_o$ is ;

≅ 0.261 μm

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3 years ago

The addition of hydrofluoric acid and __________ to water produces a buffer solution.

TEA [102]

Answer:

c. NaF

Explanation:

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2 years ago

If you blow dry your wet hair is it a physical or a chemical change

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3 years ago

How many moles is 119 grams of uranium??? I dont get this : (

Vadim26 [7]

238.02891

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4 years ago

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Soils are made up of a mineral portion, an organic portion, air and water. What is meant by the

FinnZ [79.3K]

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Explanation:

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4 years ago