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3 years ago

When a substance undergoes a Chemical Change, can the change be reversed? Explain your answer.

Chemistry

2 answers:

kirill [66]3 years ago

7 0

No, chemical changes produce new substances and majority of the time the change is irreversible.

Vinvika [58]3 years ago

3 0

Answer:When a substance undergoes a chemical change some of the chemical changes can be reversed with a chemical change.

Explanation:

A chemical change changes all of the element but some chemical changes but very few can be changed back to its original substance only with a chemical change.

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How many molecules of HCl would react with 1 mole of Mg0? Mg0 +2HCI MgCl, + H,0

Len [333]

Answer:

12.044 ×10²³ molecules of HCl

Explanation:

Given data:

Number of moles of MgO = 1 mol

Number of molecules of HCl react = ?

Solution:

Chemical equation:

MgO + 2HCl → MgCl₂ + H₂O

with 1 mole of MgO 2 moles of HCl are react.

Number of molecules of HCl react:

1 mole contain 6.022×10²³ molecules

2 mol × 6.022×10²³ molecules / 1 mol

12.044 ×10²³ molecules

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3 years ago

A graph of gas pressure versus the number of particles in a container is a straight line. Which other relationship will have a s

Elanso [62]

Volume has the same relationship with the number of particles than the pressure.

You can see it in the ideal gas equation: PV = nRT

As much as V and P are proportional to n.

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3 years ago

What is an example of a strong base? HCl NaCl NaOH HF

olchik [2.2K]

HF the answer glad to help

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3 years ago

Find the pH of HCl with a concentration of 0.00006M Round to the nearest whole number

Tpy6a [65]

Answer:

4.22

Explanation:

pH stands for potential hydrogen. The letter “p” denotes potential and the letter “H” denotes hydrogen.

pH helps to find the acidity or alkalinity of an aqueous solution.

The number of hydrogen ions (protons) present in a solution is determined by the pH scale.

A pH greater than 7 makes the water more alkaline and a pH less than 7 makes the water more acidic.

$pH=-\log [H^+]=-\log [0.00006]=4.22$

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kondaur [170]

You should never heat chemicals in a closed system (closed bottle or flask) because it might explode.

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3 years ago

When a substance undergoes a Chemical Change, can the change be reversed? Explain your answer.​

When a substance undergoes a Chemical Change, can the change be reversed? Explain your answer.