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4 years ago

Which statement best explains what is taking place

Chemistry

2 answers:

Reil [10]4 years ago

7 0

nvm its the second one

maria [59]4 years ago

4 0

Answer: Option (b) is the correct answer.

Explanation:

It is known that HCl is a strong acid and when it is dissolved in water then being strong in nature it dissociates completely in the form of hydrogen ions and chlorine ions.

The reaction will be as follows.

$HCl + H_{2}O \rightarrow H_{3}O^{+} + Cl^{-}$

When a base accepts a proton then it results in the formation of a conjugate acid whereas when an acid loses a proton the it results in the formation of a conjugate base.

So, here water on accepting a proton forms $H_{3}O^{+}$ as the conjugate acid. On the other hand, HCl on losing a proton forms $Cl^{-}$ as the conjugate base.

Thus, we can conclude that a strong base is dissociated completely, producing more conjugate acid.

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(45 pts) What is the theoretical yield (in g) of iron(III) carbonate that can be produced from 1.72 g of iron(III) nitrate and a

mote1985 [20]

Answer:

1.04g of iron III carbonate

Explanation:

First, we must put down the equation of reaction because it must guide our work.

2Fe(NO3)3(aq) + 3Na2CO3(aq)→Fe2(CO3)3(s) + 6NaNO3(aq)

From the question, we can see that sodium carbonate is in excess while sodium nitrate is the limiting reactant.

Number of moles of iron III nitrate= mass of iron III nitrate reacted/ molar mass of iron III nitrate

Mass of iron III nitrate reacted= 1.72g

Molar mass of iron III nitrate= 241.88 g∙mol–1

Number of moles of iron III nitrate= 1.72g/241.88 g∙mol–1= 7.11×10^-3 moles

From the equation of the reaction;

2 moles of iron III nitrate yields 1 mole of iron III carbonate

7.11×10^-3 moles moles of iron III nitrate yields 7.11×10^-3 × 1/ 2= 3.56×10^-3 moles of iron III carbonate

Theoretical mass yield of iron III carbonate = number of moles of iron III carbonate × molar mass

Theoretical mass yield of iron III carbonate = 3.56×10^-3 moles ×291.73 g∙mol–1 = 1.04g of iron III carbonate

8 0

3 years ago

Read 2 more answers

What is cerebrospinal fluid?

Dafna1 [17]

It’s a fluid that helps the brain by protecting it providing nourishment and controlling the waste removal.

4 0

3 years ago

6. Geologists in Egypt and Ethiopia are comparing rock samples from rocks

Tcecarenko [31]

Answer:

Both are different.

Explanation:

Both rocks are different from one another because both formed from different types of rocks. Rock A was formed from small pieces of rock while on the other hand, Rock B was formed from liquid rock so they both have different sources of rocks from which they were formed. Forming at the same time does not show that they are similar to each other, it is their source which decides that they are similar or different.

4 0

3 years ago

Why is paper towel absorbing water a chemical change

Anastaziya [24]

Answer:

it is not a chemical change

Explanation:

it is a physical change as a paper towel can be dried in the sun to turn into a regular paper towel thus proving that a paper towel absorbing water is a physical change not a chemical change

5 0

3 years ago

Find a total pressure of the gas mixture that contains forecast is with partial pressure of 5.00 kPa, 4.56 kPa 356 kPa and 678KP

Orlov [11]

Answer: 1044 kPa

Explanation: To find the total pressure of a system, you add up all the partial pressures. 5.00+4.56+356+678=1043.56, but since you need to account for significant figures it is 1044.

In addition, the amount of significant figures is the number with the smallest amount of decimal places. In this case you have no decimal places, since 356 and 678 have no decimal places. Remember that for the numbers 0-4 you round down and 5-9 you round up.

7 0

3 years ago