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3 years ago

The balanced chemical equation for the reaction of copper (Cu) and silver nitrate (AgNO3) is shown below.

2 answers:

8 0

Remark
The balance numbers in front of Ag and AgNO3 are both 2. That number is in moles.

Rule: if the moles are the same in the equation, then whatever you are given for one, will be the same for the other. So you have 0.854 moles of Ag. You will also have 0.854 moles of AgNO3

Answer: 0.854 <<<<<

Snezhnost [94]3 years ago

4 0

Answer: Moles of $AgNO_3$ that must be reacted are 0.854 moles.

Explanation:

For the given chemical reaction, the equation follows:

$Cu+2AgNO_3\rightarrow 2Ag+Cu(NO_3)_2$

By Stoichiometry of the reaction:

2 moles of silver are produced when 2 moles of silver nitrate is reacted.

So, 0.854 moles of silver is formed when = $\frac{2}{2}\times 0.854=0.854moles$ of silver nitrate is reacted.

Thus, moles of $AgNO_3$ that must be reacted are 0.854 moles.

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The volume of a single tungsten atom is 1.07×10-23 cm3. What is the volume of a tungsten atom in microliters?

vesna_86 [32]

Answer: 1.07×10^-20microlitre

Explanation:

1cm3 = 1000microlitres

1.07×10^-23 cm3 of tungsten = 1.07×10^-23 x 1000 = 1.07×10^-20microlitre

6 0

3 years ago

Select all the correct answers.

Brut [27]

Hi!

The reason for reviewing and replicating work of other scientists is influenced by two factors listed in the answer:

1. An experiment may have had errors that the scientist did not recognize. (unintentional)

2. The results of individual scientists may be influenced by bias. (intentional)

Personal motivations may often influence a scientist to manipulate the results to best suit his/her hypothesis, consequently leading to scientific fraud.

While other options listed are elements of the scientific method, they are not the reasons behind the review and replication of a scientist's work by others.

5 0

3 years ago

Read 2 more answers

Consider the following redox equation Mn(OH)2(s) + MnO4 –(aq)  MnO42 –(aq) (basic solution) When the equation is balanced with

inysia [295]

Answer : The balanced chemical equation is,

$2MnO_4^-(aq)+Mn(OH)_2(s)+4OH^-(aq)\rightarrow 3MnO_4^{2-}(aq)+2H_2O(l)$

The coefficient for $OH^-$ is, 4 and on reactant side of the equation $OH^-(aq)$ is present.

Explanation :

Rules for the balanced chemical equation in basic solution are :

First we have to write into the two half-reactions.
Now balance the main atoms in the reaction.
Now balance the hydrogen and oxygen atoms on both the sides of the reaction.
If the oxygen atoms are not balanced on both the sides then adding water molecules at that side where the more number of oxygen are present.
If the hydrogen atoms are not balanced on both the sides then adding hydroxide ion $(OH^-)$ at that side where the less number of hydrogen are present.
Now balance the charge.

The half reactions in the basic solution are :

Reduction : $Mn(OH)_2(s)+1e^-\rightarrow MnO_4^{2-}(aq)$ ......(1)

Oxidation : $MnO_4^-(aq)+4OH^-(aq)\rightarrow MnO_4^{2-}(aq)+2H_2O(l)+2e^-$ .....(2)

Now multiply the equation (1) by 2 and then added both equation, we get the balanced redox reaction.

The balanced chemical equation in a basic solution will be,

$2MnO_4^-(aq)+Mn(OH)_2(s)+4OH^-(aq)\rightarrow 3MnO_4^{2-}(aq)+2H_2O(l)$

Thus, the coefficient for $OH^-$ is, 4 and on reactant side of the equation $OH^-(aq)$ is present.

6 0

3 years ago

A mountain is a example of solid?

castortr0y [4]

Yes becuase a mountain is made up of bits of rocks and soil which is a soild

5 0

3 years ago

A solution of 2.9 m weak acid is 0.52 ionized. what is the ka value of this acid

AveGali [126]

We can get the Ka value from this formula:

Ka = [H+] [A-} / [HA]

So we need to know [H+] & [A-] & [Ha] to get the Ka value

[H+] = 2.9 * 0.52/100 =0.01508 M

and when [H+] = [A-]
∴[A-] = 0.01508 M

∴ [HA] = 2.9 - 0.01508 = 2.88 M
So by substitution:

Ka = [0.01508][0.01508] / 2.88
= 7.9 x 10^-5

6 0

3 years ago