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3 years ago

The tip of a match is ignited as it is struck against the matchbox. Why is this a chemical change?

Chemistry

2 answers:

Rufina [12.5K]3 years ago

8 0

The tip of the match is flammable its FLVS I did this and realy ITS MELTING ITS COLERFUL LOL omg is up with the awsners

LUCKY_DIMON [66]3 years ago

5 0

The answer is A, because of the chemical reaction taking place color can change (as in this case). Hope it helps!

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In the reaction FeCl2 + 2NaOH ->Fe(OH)2(s) + 2NaCl, if 6 moles of FeCl2 are added to 6 moles of Na0H, how many moles of NaOH

pogonyaev

Answer : The correct option is, (B) 6 mole

Explanation :

Given moles of $FeCl_2$ = 6 moles

Given moles of $NaOH$ = 6 moles

First we have to calculate the limiting and excess reagent.

The balanced chemical reaction is,

$FeCl_2+2NaOH\rightarrow Fe(OH)_2+2NaCl$

From the given balanced reaction, we conclude that

As, 1 moles of $FeCl_2$ react with 2 moles of $NaOH$

So, 6 moles of $FeCl_2$ react with $\frac{2}{1}\times 6=12$ moles of $NaOH$

From this we conclude that, $FeCl_2$ is an excess reagent and $NaOH$ is a limiting reagent because the given moles are less than the required moles and it limits the formation of product.

Thus, the number of moles of NaOH used up in the reaction = Required moles of NaOH - Given moles of NaOH

The number of moles of NaOH used up in the reaction = 12 - 6 = 6 moles

Therefore, the number of moles of NaOH used up in the reaction will be, 60 moles

4 0

3 years ago

Read 2 more answers

CaCO3(s)+2H*(aq) →Ca2+ (aq)+H2001+CO262)

Effectus [21]

Answer:CO2(g) will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time

Explanation:

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3 years ago

What effect might a hydroxyl group on a benzene ring of the reactant have on this reaction?

Zigmanuir [339]

Hey there!:

The hydroxyl groups act to neutralize the sodium borohydride which reduces yield.

Hope that helps!

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3 years ago

A sample of gas has a volume of 12.0 L and a pressure of 2.00 ATM. If the pressure of gas is increased to6.00 ATM, what is the n

earnstyle [38]

Answer:

Explanation:

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3 years ago

Which intermolecular force depends on the formation of temporary dipoles?

aliya0001 [1]

Correct answer: C) dispersion forces

Dispersion forces are the intermolecular forces of attraction present in all types of molecules. These are the weakest forces of attraction in which atoms of the molecule align in such a way that weak forces of attraction develop between electron cloud of one atom and the positively charged nucleus of the adjacent atom. This is referred to as induced dipole-induced dipole type of interaction. Therefore in dispersion forces temporary dipoles are developed due to constant motion of electrons that results in asymmetric electron distribution around the nucleus in an atom.

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3 years ago