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3 years ago

9

Which of the following is a synthesis reaction?

2 answers:

Anvisha [2.4K]3 years ago

8 0

Answer:

The correct answer is CO2 + H2O yields H2CO3

Explanation:

Hi!

Let's solve this!

Synthesis reactions are those that two compounds or elements come together to form another.

Let's analyze each of the reactions:

C2H4 + 3 O2 yields 2 CO2 + 2 H2O in this reaction there is a recombination of elements

2HBr yields H2 + Br2 in this reaction the hydrogen bromide is broken and two simpler molecules are formed

CO2 + H2O yields H2CO3 in this reaction two compounds come together and form one

F2 + 2 HCl yields Cl2 + 2 HF in this reaction there is a rearrangement of elements

After the analysis, we conclude that the correct answer is CO2 + H2O yields H2CO3

nadezda [96]3 years ago

6 0

Synthesis reaction is a reaction where two or more substances combine to form a new compound. <span>It is a reaction which releases energy in the form of heat and light. Therefore, it is an exothermic reaction. </span>From its the definition the correct answer is the third option where carbon dioxide and water combine to form carbonic acid.

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4.85 x 10^-4 tons to cups

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Answer:

2.08753919851 cups

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2.08753919851 cups

Explanation:

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2 years ago

What does every chemical reaction involve?

IgorC [24]

breaking bonds in reactants and forming new bonds in products. Breaking bonds requires energy, and forming bonds releases energy.

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3 years ago

Read 2 more answers

For each reaction below, use the drop-down menus to select which compound will form a precipitate. Note: It is possible that no

Dimas [21]

Answer:

1. Cadmium sulfide

2. Iron (III) hrydroxide

3. Barium carbonate

8 0

2 years ago

A reactant decomposes with a half-life of 29.5 s when its initial concentration is 0.229 M. When the initial concentration is 0.

Dmitrij [34]

Answer :

The order of reaction is, 0 (zero order reaction).

The value of rate constant is, $0.00388Ms^{-1}$

Explanation :

Half life : It is defined as the time in which the concentration of a reactant is reduced to half of its original value.

The general expression of half-life for nth order is:

$t_{1/2}\propto \frac{1}{[A_o]^{n-1}}$

or,

$\frac{t_{1/2}_1}{t_{1/2}_2}=\frac{[A_2]^{n-1}}{[A_1]^{n-1}}$

or,

$n=\left(\frac{\log\frac{(t_{1/2})_1}{(t_{1/2})_2}}{\log\frac{(A)_2}{(A)_1}}\right )+1$ .............(1)

where,

$t_{1/2}$ = half-life of the reaction

n = order of reaction

[A] = concentration

As we are given:

Initial concentration of A = 0.229 M

Final concentration of A = 0.639 M

Initial half-life of the reaction = 29.5 s

Final half-life of the reaction = 82.3 s

Now put all the given values in the above formula 1, we get:

$n=\left (\frac{\log \frac{29.5}{82.3}}{\log\frac{0.639}{0.229}}\right )+1$

$n=0.000196\approx 0$

Thus, the order of reaction is, 0 (zero order reaction).

Now we have to determine the rate constant.

To calculate the rate constant for zero order the expression will be:

$t_{1/2}=\frac{[A_o]}{2k}$

When,

$t_{1/2}$ = 29.5 s

$[A_o]$ = 0.229 M

$29.5s=\frac{0.229M}{2k}$

$k=0.00388Ms^{-1}$

Thus, the value of rate constant is, $0.00388Ms^{-1}$

4 0

3 years ago

What is the Net Ionic Equation of the chemical equation (NH4)2S(aq) + 2KOH(aq) -> K2S(aq) + 2NH4OH(s)?

tangare [24]

Answer:

Chemical Equation: (NH4)2S(aq) + 2KOH(aq) -> K2S(aq) + 2NH4OH(s)

Explanation:

8 0

2 years ago