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3 years ago

Using the reactivity series shown in the handbook, tell whether the following reactions

1 answer:

6 0

The possibility of metals replacing each other is dependent on the relative positions of the metals in the activity series.

The activity series is an arrangement of elements in order of decreasing reactivity. The elements that are higher in the series can displace the elements that are lower in the series.

Before we make a decision in each case, we must consider what metal is lower or higher in the series;

Between Na and K, Na is lower in the series so the answer is no
Between Co and Cu, Co is higher than Cu in the series so the answer is yes
Since Zn and Zn^2+ are just a specie and its ion, the answer is no.
Since Ba is higher than Ni, Ni can not replace Ba so the answer is no

Learn more: brainly.com/question/24058474

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Grace [21]

Answer:

B)Wegener

Explanation:

4 0

3 years ago

What is the poh of a 4.5x10^-3 m oh- solution?

Ksju [112]

The formula for pOH is -log(M)

So, all we need to do is plug in that number! -log(4.5x10^-3)
That gives us 2.3, so the pOH is 2.3 :)

6 0

3 years ago

Read 2 more answers

Describe the process you used to build a model. What did you do first? second?

dimaraw [331]

First read the introduction.

Seconds look at the pictures how to build it.

3 0

3 years ago

The rate constant for the first-order decomposition of N2O5 (g) to NO2 (g) and O2 (g) is 7.48 * 10-3 s-1 at a given temperature.

alina1380 [7]

Answer:

Explanation:

In this problem, we have a first-order decomposition reaction with a given rate constant. The rate law for a first-order reaction like this is

[

]

, where k is the rate constant and [A] is the concentration of the reactant (renamed as A, for brevity). To find the dynamics of the reaction with time, we can integrate the rate law to get an expression for [A](t):

rate = −d[A]dt = k[A]

[A]f =[A]i e−kt

We want the total pressure of the reaction chamber to be 0.145 atm, with a starting reactant pressure of 0.110 atm. To solve for the time this reaction takes, we need the reaction equation:

2N2O5(g) → 4NO2(g) + O2(g)

Using the stoichiometry of the reaction equation, we can determine the final pressure of the reactant. This requires us to rewrite the total pressure equation in terms of the change in pressure of the reactant.

Pf=0.145atm

Pi=0.110atm = pN2O5

iPf =pN2O5

f +pNO2 + pO2pNO2 = 4pO2

This comes from the stoichiometry.

pNO2 = 2(pN2O5i − pN2O5f )

This comes from the stoichiometry.

pNO2 = −2ΔpN2O5Pf = (pN2O5i + ΔpN2O5) − 2ΔpN2O 5 − 12ΔpN2O5

0.145atm =(0.110atm + ΔpN2O5) − 2.5ΔpN2O5 = 0.110atm − 1.5ΔpN2O5

ΔpN2O5 = −0.0233atm

pN2O5f = 0.110atm − 0.0233atm =

0.0867atm

This is our final pressure! Now we can use the integrated rate law.

8 0

3 years ago

Write a balanced chemical equation that describes an acid-base reaction that would allow you to determine the moles of aspirin p

Kryger [21]

A balanced equation representing the acid-base reaction that allows the calculation of the moles of aspirin in a sample is

$C_{9} H_{8}O_{4} + NaOH$ ⇒ $C_{9} H_{7}O_{4} Na+ H_{2} O$

Aspirin, also known as acetylsalicylic acid, is a nonsteroidal anti-inflammatory drug used to reduce pain, fever, and/or inflammation, and as an antithrombotic.

Aspirin is a benzoic acid with an ortho-substituted acylated alcohol function (actually a phenol). Therefore, two reactions can occur when aspirin and NaOH are combined: In fact, several aspirin formulations contain this ingredient.

Hence, A balanced equation representing the acid-base reaction that allows the calculation of the moles of aspirin in a sample is

$C_{9} H_{8}O_{4} + NaOH$ ⇒ $C_{9} H_{7}O_{4} Na+ H_{2} O$

To know more about Aspirin, here : brainly.com/question/23878261

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6 0

1 year ago