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3 years ago

Is a burning log an exothermic or endothermic event if the log is the system?

Chemistry

2 answers:

Katyanochek1 [597]3 years ago

8 0

Answer:

Exothermic

Explanation:

Burning wood provides heat through the exothermic chemical reaction of oxygen (O) with cellulose (C6H10O5), the major chemical component of wood, to produce carbon dioxide (CO2), steam (H2O) and heat.

yaroslaw [1]3 years ago

3 0

Answer:

Im the one who dont know the answer

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Which of the following substances would you expect to have a low melting point?

Lorico [155]

The substance you would expect to have a low melting point would be carbon dioxide, so the correct answer would be A

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2 years ago

You must make 1 L of 0.2 M acetic acid (CH3COOH). All you have available is concentrated glacial acetic acid (assay value, 98%;

Sergeu [11.5K]

Answer:

The correct answer is "11.44 ml".

Explanation:

Molarity,

= 0.2 M

Density,

= 1.05 g/ml

Volume,

= 1 L

As we know,

⇒ $Molarity=\frac{No. \ of \ moles }{Volume \ of \ solution}$

or,

⇒ $No. \ of \ moles=Molarity\times Volume$

On putting the values, we get

⇒ $=0.2\times 1$

⇒ $=0.2 \ moles$

Now,

⇒ $No. \ of \ moles=\frac{Mass \ taken}{Molecular \ mass}$

or,

⇒ $Mass \ taken=No. \ of \ moles\times Molecular \ mass$

⇒ $=0.2\times 60.05$

⇒ $=12.01 \ gram$

hence,

⇒ $Density= \frac{Mass }{Volume}$

or,

⇒ $Volume=\frac{Mass}{Density}$

⇒ $=\frac{12.01}{1.05}$

⇒ $=11.44 \ ml$

7 0

3 years ago

A lithium atom that has lost an electron comes near a chlorine atom that has gained an electron. What happens?

lina2011 [118]

C. They form an ionic compound LiCl

8 0

3 years ago

Read 2 more answers

Helen [10]

Answer:

1) atomic number is the same. Both, chlorine atom and anion, have atomic number 17. They have 17 protons in nucleus of an atom.

2) both are the same element.

Explanation:

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2 years ago

Silver chloride breaks down to form silver and chlorine in the presence of light. What type of reaction is this?

Vitek1552 [10]

This is the decomposition reaction, namely the reaction of photolysis.

2AgCl = 2Ag + Cl₂

7 0

3 years ago