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jek_recluse [69]
3 years ago
6

Bond energy what makes a reaction endothermic or exothermic worksheet answers

Chemistry
1 answer:
Soloha48 [4]3 years ago
8 0
The gain or loss of heat energy is what makes a reaction either endothermic or exothermic. A reaction is said to be endothermic if it absorb heat from the environment while a reaction is described as exothermic if it gives out heat to the environment. During chemical reaction, the bond energy of the reactants needs to be broken and new bond has to be formed in the products. The formation and breaking of bonds requires energy,
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Which Ions oxidize aluminum?<br><br> Li^+, Ca^2+, Ag+, Sn^2+
pishuonlain [190]

Aluminum can be oxidized by Li^{+} and Ca^{2+}

<h3>What is oxidizing?</h3>

Some of the metal corrodes (or oxidizes) and forms the corresponding metal oxide on the surface as a result of a chemical reaction between the metal surface and the oxygen in the air. The corrosion products that occur in some metals, like steel, are highly apparent and loose.

According to reactivity series (The array of metals in the descending order of their reactivities is referred to as the metals' reactivity series. It is sometimes referred to as the metals in the activity series.)

Lithium and calcium ions are more reactive than aluminum ion and they are less electronegative.

Since silver and tin are more electronegative than aluminum so, they cannot oxidize aluminum.

∴ Li^{+} and Ca^{+2} ions can oxidize aluminum.

Learn more about electronegativity here brainly.com/question/16446391

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2 years ago
What is a primary food crop
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Scientists grow cells in a small plate called a petri dish which is filled with a gel that appears red. When you apply a swab of
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Addition of 6 m hcl to which substance will not result in gas evolution?
saul85 [17]

There is no gaseous product when NaNO3 reacts with 6M HCl.

We must note that gas evolution is one of the signs that a chemical reaction has taken place. Hence, we must consider the options and look out for an option in which reaction with HCl does not lead to a gaseous product. This is the option that does not lead to evolution of a gas.

Let us consider the reaction; NaNO3(s) + HCl(aq) ---> NaCl(s) + HNO3(aq), there is no gaseous product hence NaNO3 does not result in gas evolution upon addition of 6M HCl.

Missing parts;

Addition of 6 M HCl to which substance will NOT result in gas evolution?

(A) Al

(B) Zn

(C) K2CO3

(D) NaNO3

Learn more about evolution of gas: brainly.com/question/2186340

6 0
3 years ago
A lab technician mixed a 550 ml solution of water and alcohol. if​ 3% of the solution is​ alcohol, how many milliliters of alcoh
kupik [55]

The solution 550 ml total and first we will find the amount of alcohol. 3% = 0.03 550 ml x .03 = 16.5 ml alcohol
 Then to find the amount of water used, we just have to subtract the amount of alcohol from the total volume  
550 ml total - 16.5 ml alcohol = 533.5 ml water
5 0
4 years ago
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