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aleksandrvk [35]
3 years ago
6

Most chemical changes are _________ and cannot be reversed .

Chemistry
1 answer:
Pachacha [2.7K]3 years ago
5 0

Answer:

irreversible changes

Explanation:

Most chemical changes are permanent and cannot be reversed. That is because a chemical change involves changing the molecular composition which can't be reversed. A common example of a chemical change would be burning wood. The wood burning into ash is changing the molecular composition of the wood transforming it to ash. Now can ash be changed back into wood? No, it is a "irreversible change."

Hope this helps.

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A binary covalent bond exists between
Deffense [45]

Answer:

B

Explanation:

Double Covalent bonds or as you say "binary" bonds consists of 2 non-metals only, nothing else.

Hope this helps!

5 0
3 years ago
calculate the ph of the resulting solution if 17.0 ml of 0.170 m hcl(aq) is added to 22.0 ml of 0.170 m naoh(aq).
Natalka [10]

The pH of the finsl solution is equal to <u>2.93</u>

Concentration is the abundance of a constituent divided by way of the overall volume of an aggregate. several sorts of mathematical descriptions may be outstanding: mass concentration, molar concentration, variety concentration, and extent awareness.

C₁ = 0.170 m

V₁ = 17 ml = 0.017 L

C₂ = 0.170 M

V₂ = 22 ml = 0.022 L

C₁V₁ =C₂V₂

0.170× 0.017 L = 2.89 × 10⁻³  ------------- HCl

0.170× 0.022 L = 3.74 × 10⁻³  ------------ NaOH

⇒ 3.74 × 10⁻³  -  2.89 × 10⁻³ = 0.85 × 10⁻³

⇒ 3 + log 0.85

⇒ 3 + -0.07

⇒ pH = <u>2.93</u>

The concentration of an solution is a degree of the amount of solute that has been dissolved in a given amount of solvent or solution. A focused solution is one which has a rather huge amount of dissolved solute.

Learn more about concentration here:-brainly.com/question/26255204

#SPJ4

5 0
1 year ago
Heat packs are used to relax muscles. Some heat packs contain iron in a small packet. To
WITCHER [35]

Answer:

Explanation:sheesh baby monkey omah

4 0
3 years ago
Combustion of methanol displayed formula???
Andrew [12]

Answer:

reee, here is your answer.

Explanation: CH3OH(l) + 3O2(g) rightarrow CO2(g) + 3H2O(g) CH3OH(l) + O2(g) rightarrow CO2(g) + 2H20(g) CH3OH(l) + 2O2(g) rightarrow 2CO2(g) + 4H20(g) 2CH3OH(l) + 3O2(g) rightarrow 2CO2(g) + 4H20(g) Correct Calculate Delta H degree rxn at 25 degree C.

6 0
3 years ago
What is the molar mass of MgCl2
Pachacha [2.7K]

Answer:

The molar mass of MgCI2 is 95.211 g/mol

3 0
3 years ago
Read 2 more answers
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