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4 years ago

Using the black numbers on the stopwatch to answer the questions.

Chemistry

2 answers:

Andrew [12]4 years ago

8 0

Answer: The answer to the top one is 5.3 s and the bottom one is tenths of seconds

Explanation: Hope this helps plz mark!! Thx

Rus_ich [418]4 years ago

4 0

Answer: the top one is 5.3 s and the bottom one is tenths of seconds

Explanation:

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HELP! what's the kPa?

Rus_ich [418]

Answer:

50,662.5 kPa

Explanation:

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3 years ago

An ionic compound has a very negative heat of solution in water. Would you expect it to be soluble or insoluble in water?.

ddd [48]

Answer:

It will be Insolube in water

8 0

3 years ago

_________ is a systematic method of naming chemical compounds. This creates an unambiguous and consistent name for any chemical

Vlada [557]

Answer: IUPAC NOMENCLATURE

Explanation:

IUPAC stands for International Union of Pure and Applied Chemistry. They devised a systematic method for naming compounds in order to create a uniform global unambiguous system of nomenclature hence making it easier for researchers to share information more freely without the hindrance of reporting the same compound using different names in different parts of the world thus creating confusion in chemical literature.

6 0

3 years ago

Dinitrogen pentoxide is used in the preparation of explosives. If 7.93 mol of

Tpy6a [65]

The volume of O₂ produced: 84.6 L

<h3>Further explanation</h3>

Given

7.93 mol of dinitrogen pentoxide

T = 48 + 273 = 321 K

P = 125 kPa = 1,23365 atm

Required

Volume of O₂

Solution

Decomposition reaction of dinitrogen pentoxide

2N₂O₅(g)→4NO₂(g)+O₂ (g)

From the equation, mol ratio N₂O₅ : O₂ = 2 : 1, so mol O₂ :

= 0.5 x mol N₂O₅

= 0.5 x 7.93

= 3.965 moles

The volume of O₂ :

$\tt V=\dfrac{nRT}{P}\\\\V=\dfrac{3.965\times 0.082\times 321}{1.23365}\\\\V=84.6~L$

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3 years ago

HELP PLZZZZZZZZZZZZZ I WILL GIVE BRAINLIST!!!!!!!!!!!

Phantasy [73]

Answer:

c the pressure increases

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3 years ago