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3 years ago

I need help with this worksheet please

Chemistry

1 answer:

IrinaVladis [17]3 years ago

4 0

starting with q.1 its the 2nd and 7th day

q.2 the 12th

q.3 is 8 days

q.4 its the second 6 days

q.5 9 days

q.6 4 days

q.7 5 of the days

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2 years ago

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_Cl2 + _NaBr → _NaCl + _Br2 Answer: 1,2,2,1

nlexa [21]

1 2 2 1 is the answer so u are correct

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3 years ago

Explain the connection between reactants, products and limiting reactant.

balu736 [363]

In easy words the connection between Reactants, Products and Limiting reactants is as follow,

Reactants and Products:
Reactants are the starting materials for the synthesis of final synthesized materials called as products.

Example:
CH₄ + 2 O₂ → CO₂ + 2 H₂O

In above reaction Methane (CH₄) and Oxygen (O₂) are the reactants while, CO₂ and H₂O are the products.

Reactants, Products and Limiting Reactants:
Considering the same example it is seen that for one mole of CO₂ two moles of O₂ are required to completely convert into CO₂ and H₂O. If either of the reactant is taken less than the required amount then it will act as a limiting reactant because it will consume first leaving the second reactant present in excess as compare to it. Hence, we can say that the limiting reactant is the starting material which controls the amount of product being formed.

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3 years ago

According to the law of conservation of mass, what should the product side of this single replacement reaction look like? A. H2

Katyanochek1 [597]

Answer: The product side must be $ZnCl_2+H_2$

Explanation:

Single displacement reaction is defined as the reaction in which more reactive metal displaces a less reactive metal from its chemical reaction.

$AB+C\rightarrow CB+A$

Metal C is more reactive than metal A.

The reactivity of metal is determined by a series known as reactivity series. The metals lying above in the series are more reactive than the metals which lie below in the series.

Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form. This also means that total number of individual atoms on reactant side must be equal to the total number of individual atoms on the product side.

When zinc metal reacts with hydrochloric acid, it leads to the production of zinc chloride and hydrogen gas. The chemical reaction follows:

$Zn+2HCl\rightarrow ZnCl_2+H_2$

On reactant side:

Number of zinc atoms = 1

Number of hydrogen atoms = 2

Number of chlorine atoms = 2

On product side:

Number of zinc atoms = 1

Number of hydrogen atoms = 2

Number of chlorine atoms = 2

Hence, the product side must be $ZnCl_2+H_2$

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3 years ago

Which element requieres the least amount of energy to remove the outermost electron

Arte-miy333 [17]

Answer: Sodium

Explanation: The sodium has only one electron at the outer layer.

Hope this helps! :)

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3 years ago

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