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Neko [114]
3 years ago
9

When a lead acid car battery is recharged by the alternator, it acts essentially as an electrolytic cell in which solid lead(II)

sulfate PbSO4 is reduced to lead at the cathode and oxidized to solid lead(II) oxide PbO at the anode. Suppose a current of 96.0A is fed into a car battery for 37.0 seconds. Calculate the mass of lead deposited on the cathode of the battery.
Chemistry
1 answer:
Rainbow [258]3 years ago
6 0

Answer: 3.73 grams

Explanation:

Q=I\times t

where Q= quantity of electricity in coloumbs

I = current in amperes = 96.0 A

t= time in seconds = 37.0 sec

Q=96.0A\times 37.0s=3552C

The reaction at cathode is:

Pb^{2+}+2e^-\rightarrow Pb

96500\times 2=193000Coloumb of electricity deposits 1 mole of  

3552 C of electricity deposits =\frac{1}{193000}\times 3552=0.018moles of Pb

\text {mass of Pb}={\text{moles}\times {\text{Molar mass}}

\text {mass of Pb}={0.018}\times {207.2g/mol}=3.73g

Thus mass of lead deposited is 3.73 g

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If an unknown liquid has a density of 0.756 g/mL and a mass of 2.00 g, what is its volume?
OverLord2011 [107]

Answer:

<h3>The answer is 2.65 mL</h3>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density} \\

From the question

mass = 2 g

density = 0.756 g/mL

So we have

volume =  \frac{2}{0.756}  \\  = 2.645502...

We have the final answer as

<h3>2.65 mL</h3>

Hope this helps you

4 0
3 years ago
Which of the following bond types is the strongest?
Andre45 [30]

Answer:

b) Ion-dipole

Explanation:

Intermolecular forces are the forces of attraction or repulsion between molecules, they are significantly weaker than intramolecular forces like covalent or ionic bonds.

  • <em>Hydrogen bonds</em> happen between a partially positively charged hydrogen and another partially negatively charged, it's a type of dipole-dipole interaction, one of the strongest among intermolecular forces.
  • <em>Ion-dipole</em> involves an ion and polar molecule, its strength is proportional to the charge of the ion. It's stronger than hydrogen bonds because the ion and the polar molecule align so positive and negative charges are next to another allowing maximum attraction.
  • <em>Dipole-dipole </em>is an interaction between two molecules that have permanent dipoles, aligning to increase attraction.
  • <em>Ion-dipole</em> induced usually happens when a non-polar molecule interacts with an ion causing the molecule to be temporary partially charged. It's a weaker interaction.
  • <em>Dipole- Induced Dipole</em>, like ion-dipole induced this interaction causes one of the two involved molecules to be temporary partially charged.

Considering this information we can conclude that Ion-Dipole interaction is the strongest force among intermolecular forces.

I hope this information is useful to you!

5 0
3 years ago
when chemical x is added to a certain liquid, it breaks down into chemicals y and z. it is not possible to simplify chemicals y
Hatshy [7]
Elements are the same type of atoms, so there is nothing else to separate. Hydrogen has hydrogen atoms, and no other kind. Therefore nothing can be taken out of it anymore. Chemical x is a mixture, made by y and z. Nothing can make up y and z but themselves.
5 0
3 years ago
Pls I need help give away 11 points
Maru [420]

Answer:

The charge is +2

Explanation:

Protons are positive, electrons are negative. 10-8=2.

+2 :)

7 0
3 years ago
Look at the chemical equation shown below. A, B, X, and Y represent different elements or polyatomic ions.
VLD [36.1K]

Answer:

The answer to your question is an acid base reaction

Explanation:

A single replacement reaction  is a reaction in which one metal replaces the cation of a compound. The reaction of this problem is not of this type because here the reactants are compounds no single elements.

A decomposition reaction  is a reaction in which one compound decomposes into two or more products. This is not the answer to this question because in this reaction there are two reactants not only one.

A synthesis reaction  is a reaction in which two reactants form only one product. The reaction of this problem is not of this type because there are two products not only one.

An acid-base reaction is a kind of double replacement reaction. In some acid-base reactions, there is an interchange of cations and anions like is shown in this reaction.

8 0
3 years ago
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