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4 years ago

11

Write a net ionic equation for the reaction that occurs when aqueous solutions of hypochlorous acid and sodium hydroxide are com

bined.

1 answer:

kykrilka [37]4 years ago

5 0

HClO+NaOH----> NaClO+H2O
HClO+Na^{+} + OH^{-}---->Na{+}+CLO^{-} +H2O
HClO+ OH^{-}---->CLO^{-} +H2O

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Which of the following is not a chemical change?

MaRussiya [10]

Answer:

May be boiling is the answer because all other options are a proper chemical changes.

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3 years ago

Provide an orbital energy level diagram for the geound state of a nitrogen atom.

Alenkasestr [34]

Answer:

A

Explanation:

Nitrogen is an atom made up of 7 electrons.

To draw the orbital energy level diagram, let us write the orbital notation of the atom;

7 electrons of Nitrogen:

1s² 2s² 2p³

So,

The orbital notation diagram is :

1s² 2s² 2p³

↑↓ ↑↓ ↑↑↑

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3 years ago

Convert: 6 cubic centimeters to fluid ounces. 2.03 0.203 0.00203 0.000203

NNADVOKAT [17]

Convert: 6 cubic centimeters to fluid ounces. 2.03 0.203 0.00203 0.000203

=0.203

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4 years ago

How many molecules in each sample?<br><br> 64.7 g N2<br> 83 g CCl4<br> 19 g C6H12O6

lilavasa [31]

Answer:

1.39x10²⁴ molecules N₂

.25x10²³ molecules CCl₄

6.38x10²² molecules C₆H₁₂O₆

Explanation:

First we <u>convert the given masses into moles</u>, using the <em>compounds' respective molar mass</em>:

64.7 g N₂ ÷ 28 g/mol = 2.31 mol N₂

83 g CCl₄ ÷ 153.82 g/mol = 0.540 mol CCl₄

19 g C₆H₁₂O₆ ÷ 180 g/mol = 0.106 mol C₆H₁₂O₆

Then we multiply each amount by <em>Avogadro's number</em>, to <u>calculate the number of molecules</u>:

2.31 mol N₂ * 6.023x10²³ molecules/mol = 1.39x10²⁴ molecules

0.540 mol CCl₄ * 6.023x10²³ molecules/mol = 3.25x10²³ molecules

0.106 mol C₆H₁₂O₆ * 6.023x10²³ molecules/mol = 6.38x10²² molecules

3 0

3 years ago

During a skin burn from an oven, approximate the skin and tissue layer to be infinitely thick compared to the damaged layer. The

Vlad [161]

Answer:

The depth of the damage is given as $x = 1.357*10^{-3}m$

Explanation:

From Fick's second law

$\frac{C_{x}-C_{0}}{C_{s}-C_{0}} = 1 -erf [\frac{x}{2\sqrt{Dt} } ] ...(1)$

Where

$C_x$ is the temperature when the skin is damage

$C_0$ is the initial temperature of the skin

$Cs$ is the temperature of the oven

erf is a mathematical function known as error function

D is the thermal diffusivity

x is the depth of the damage

From the question we are given that

$C_x$ = 62°C

$C_0$ = 33°C

D = $2.5 * 10^{-7} m^2/s.$

Substituting values into equation one

$\frac{62-33}{200-33} = 1 -erf [\frac{x}{2\sqrt{2.5*10^{-7}} *2} ]$

$erf[\frac{x}{1.414*10^{-3}} ] = 0.826\\$

Let assume that $z =\frac{x}{1.414*10^{-3}} ... (2)$

Hence

$erf(z) = 0.826$

Looking at the table of error function shown on the first uploaded image

We can use interpolation to obtain the value of z in this manner

$\frac{z-0.95}{0.8260-0.8209} = 1$

z = 0.96

Substituting the value of z into equation 2

$0.96 = \frac{x}{1.414*10^{-3}}$

$x = 1.357*10^{-3}m$

5 0

3 years ago