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4 years ago

Chlorine melts at 172 k what is chlorines melting point in C

1 answer:

7 0

<span><HTML><META HTTP-EQUIV="content-type" CONTENT="text/html;charset=utf-8"> <p class="answer-detail Fw-n" id="yui_3_17_2_3_1463589225479_1149"><SPAN class="ya-q-full-text" id="yui_3_17_2_3_1463589225479_1148" itemprop="text">K = 273.15 + C <BR><BR>K = 172 so substitute <BR><BR> 172 = 273.15 + C <BR><BR> C = 172 - 273.15 = -101.15</SPAN> </DIV></span>

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What is the pH of a 9.50×10−2 M ammonia solution??

Darina [25.2K]

NH₃ + H₂O ⇄ NH₄⁺ + OH⁻

c=9,50*10⁻² mol/L

Ammonia solution is a weak electrolyte.
The dissociation constant of ammonium hydroxide is:
K=1.78*10⁻⁵

[OH⁻]=√(Kc)

pH=14-pOH=14+lg[OH]⁻
pH=14+lg(√(Kc))

pH=14+lg(√(1.78*10⁻⁵*9.50*10⁻²))=8.23
pH=8.23

4 0

3 years ago

Which is a binary compound?

nirvana33 [79]

Answer:

it is made up of two or more element

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3 years ago

What did the Paxton Boys demand? that liquor not be banned in Georgia that slave codes be tightened in New York that the Indians

laiz [17]

Answer:

Indians be removed from Pennsylvania

Explanation:

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4 years ago

I am confuse and need help

dmitriy555 [2]

Answer:

+625kj/mol

Explanation:

I hope my is right

5 0

3 years ago

A sample of a substance is found to have a mass of 223.5 grams. A graduated cylinder contains 45.6 ml of water. After a metal cy

Paraphin [41]

Answer:

We have the final answer as

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass of substance = 223.5 g

volume = final volume of water - initial volume of water

volume = 68.3 - 45.6 = 22.7

volume = 22.7 mL

It's density is

$density = \frac{223.5}{22.7} \\ = 9.84581497797...$

We have the final answer as

Hope this helps you

5 0

3 years ago