The on that is considered a physical change is : A. Sawing a piece of wood in half
When you cut a piece of wood, the chemical compound within the wood will not change at all, which mean that it's a physical change
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Answer: 24 N
Explanation: solution attached:
F = ma
= 6.0 kg ( 4.0 m/s²)
= 24 N
Bellow you may find the names and structure of the poliatomic ions.
Explanation:
sulfate SO₄²⁻
nitrate NO₃⁻
perphosphate PO₅²⁻
hypoiodite IO⁻
chlorite ClO₂⁻
phosphite PO₃³⁻
percarbonate H₃CO₆²⁻
bromate BrO₃⁻
hyposulfite SO₂²⁻
permanganate MnO₄⁻
carbonite CO₂²⁻
CO₃²⁻ carbonate
MnO₃⁻ manganate
SO₅²⁻ persulfate
BrO₂¹⁻ bromite
CO₄²⁻ percarbonate
PO₅³⁻ perphosphate
ClO¹⁻ hypochlorite
IO₂¹⁻ iodate
PO₄³⁻ phosphate
NO₂¹⁻ nitrite
SO₄²⁻ sulfate
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polyatomic ions
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The (w/v)% concentration of vinegar contains 5g of acetic in 100mL of solution is approx 0.5 %
<h3>What is Concentration ?</h3>
The concentration of a chemical substance expresses the amount of a substance present in a mixture.
There are many different ways to express concentration.(w/v)% is one of them.
Given ;
- Mass of solute(acetic acid) is 5.0 g
- Volume of solution is 100.0 mL.
We need to convert the grams of acetic acid to moles ;
Formula of acetic acid is CH₃COOH
Thus,
Molar mass of acetic acid = 2(12.01) + 4(1.01) + 2(16)
= 24.02 + 4.04 + 32
= 60.06 grams per mol
Moles of acetic acid = 5.0/60.06
= 0.083 moles
(w/v)% = 0.083 x 60 / 1000 x 100
= 0.498 %
= 0.5 %
Hence, The (w/v)% concentration of vinegar contains 5g of acetic in 100mL of solution is approx 0.5 %
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Answer:
c supersaturated
Explanation:
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