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3 years ago

Explain how synthesis and decomposition reactions can be reverse of one another

1 answer:

5 0

Decompostion reaction have the general chemical reaction of: AB = A + B while synthesis reactions are of the general equation A + B = AB. These reaction can be the reverse of each other because ones building a compound (synthesis) and ones breaking down a compound (decomposition). For example, when reacting carbon and oxygen for a synthesis reaction we have: C + O2 = CO2 and for a decomposition reaction we have: CO2 = C + O2. Thus, these two reactions are the reverse of each other.

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Dhdidhsidbushddbdudhhdh

asambeis [7]

Answer:

It is the 4th option.

Explanation:

5 0

3 years ago

What mass of chromium (cr) is contained in 35.8 g of (nh4)2cr2o7 ?

fiasKO [112]

M{(NH₄)₂Cr₂O₇}=2A(N)+8A(H)+2A(Cr)+7A(O)

M{(NH₄)₂Cr₂O₇}=252.065 g/mol

M(Cr)=51.996 g/mol

m{(NH₄)₂Cr₂O₇}/M{(NH₄)₂Cr₂O₇}=m(Cr)/2M(Cr)

m(Cr)=2M(Cr)m{(NH₄)₂Cr₂O₇}/M{(NH₄)₂Cr₂O₇}

m(Cr)=2*51.996*35.8/252.065=14.770 g

m(Cr)=14.770 g

7 0

4 years ago

A rigid tank is divided into two equal volumes. One side contains 2 kmol of nitrogen N2 at 500 kPa while the other side contains

k0ka [10]

Answer:

The partial pressure of the $CO_2$ in the final mixture is 200 kPa.

Explanation:

Pressure of nitrogen gas when the two tanks are disconnected = 500 kPa

Pressure of the carbon-dioxide gas when the two tanks are disconnected = 200 kPa

Moles of nitrogen gas = $n_1= 2 kmol$

Moles of carbon dioxide gas = $n_2=8 kmol$

After connecting both the tanks:

The total pressure of the both gasses in the tank = p = 250 kPa

According to Dalton' law of partial pressure:

Total pressure is equal to sum of partial pressures of all the gases

Partial pressure of nitrogen = $p_{N_2}^o$

Partial pressure of carbon dioxide= $p_{CO_2}^o$

$p_{N_2}^o=p\times \frac{n_1}{n_1+n_2}$

$p_{N_2}^o=250 kPa\times \frac{0.2}{0.2+0.8}=50 kPa$

$p_{CO_2}^o=p\times \frac{n_2}{n_1+n_2}$

$p_{CO_2}^o=250 kPa\times \frac{0.8}{0.2+0.8}=200 kPa$

The partial pressure of the $CO_2$ in the final mixture is 200 kPa.

7 0

3 years ago

a saturated solution of Cu(IO3)2 was prepared in 0.0250 M KIO3. The copper concentration was found to be 0.00072 M. Set up an IC

Ber [7]

Answer:

$\large \boxed{\text{0.0264 mol/L; }5.0 \times 10^{-7}}$

Explanation:

1. The ICE table

$\begin{array}{rccccc} &\text{Cu}\text{(IO}_{3})_{2} & \rightleftharpoons &\text{Cu}^{2+}&+ & 2\text{IO}_{3}^{-}\\\\\text{I:}& & & 0 & & 0.0250\\\text{C:}& & & +x & & x \\\text{E:}& & & x & &0.0250 + 2x\\\end{array}$

2. Concentration of IO₃⁻

At equilibrium, [Cu²⁺] = 0.000 72 mol·L⁻¹, so x = 0.000 72.

The new ICE table becomes

$\begin{array}{rccccc} &\text{Cu}\text{(IO}_{3})_{2} & \rightleftharpoons &\text{Cu}^{2+}&+ & 2\text{IO}_{3}^{-}\\\\\text{I:}& & & 0 & & 0.0250\\\text{C:}& & & +0.00072 & & 0.00144 \\\text{E:}& & & 0.00072 & & \mathbf{0.0264}\\\end{array}\\\text{The equilibrium concentration of iodate ion is $\large \boxed{\textbf{0.0264 mol/L}}$}$

3. Ksp

$K_{\text{sp}} = [\text{Cu}^{2+}][\text{IO}_{3}^{-}]^{2} = 0.00072 \times 0.0264^{2} = \mathbf{5.0 \times 10^{-7}}$

7 0

4 years ago

Write the chemical properties of metal with an example of each

STatiana [176]

Answer:

high density, malleable, ductile, can corrode, good conductors,

Explanation:

gold's density is 19.3 g/cc compared to something like water which is 1g/cc

aluminum is extremely malleable, it can be flattened into thin sheets

copper can be formed into complex forms without breaking like wire, instruments, and bed frames

steel can get corroded by the oxygen particles in the air if it stays out too long.

copper is an excellent example of a conductor, it is used to make wires which conduct electricity that brings "power" into things like lights, computers, and TVs

6 0

2 years ago