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Nesterboy [21]
3 years ago
9

Matter changes whenever _______ is added or taken away

Chemistry
2 answers:
zaharov [31]3 years ago
8 0
Matter changes whenever ENERGY is added or taken away
Alja [10]3 years ago
7 0
Matter changes whenever energy is added or taken away.
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* Urgent Bet no one knows this *
Tju [1.3M]

Answer: The name of the super continent that existed millions of years ago.

Explanation:

Our continents as they exist today were once joined together into a super continent known as Pangea. Over the millennia, the land masses broke off and drifted away creating the location of the continents we know today.

7 0
3 years ago
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Name and write the structures of all isomers of the propyl and butyl alkyl groups.
sergeinik [125]

Answer:

Explanation:

Propyl and butyl groups are the alkyl groups formed by replacing the one hydrogen atom from their corresponding alkanes.

Propyl is formed from propane and has n-propyl and isopropyl alkyl isomers.

Butyl is from butane and has n-butyl, isobutyl , sec-butyl and tertiary butyl alkyl isomers.

6 0
3 years ago
Pee?<br> a) gaming<br> b) yes<br> c) king dedede<br> d) 7
d1i1m1o1n [39]

Answer:

WHat? lol

Explanation:

5 0
3 years ago
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Volume of water displaced = 94.60 cm3 Answer the following questions: Mass = g Density =
Contact [7]
We know that density is a measure of mass per unit of volume:
    Density = Mass / Volume

Therefore, we can calculate for the mass
    Mass = Density * Volume

if the density of water is 1 g/cm^​3:
    Mass = Density * Volume
              = (1 g/cm^​3) * 94.60 cm^​3
              = 94.60 g

8 0
3 years ago
A solution is made by dissolving 58.125 g of sample of an unknown, nonelectrolyte compound in water. The mass of the solution is
e-lub [12.9K]

Answer:

molecular weight (Mb) = 0.42 g/mol

Explanation:

mass sample (solute) (wb) = 58.125 g

mass sln = 750.0 g = mass solute + mass solvent

∴ solute (b) unknown nonelectrolyte compound

∴ solvent (a): water

⇒ mb = mol solute/Kg solvent (nb/wa)

boiling point:

  • ΔT = K*mb = 100.220°C ≅ 373.22 K

∴ K water = 1.86 K.Kg/mol

⇒ Mb = ? (molecular weight) (wb/nb)

⇒ mb = ΔT / K

⇒ mb = (373.22 K) / (1.86 K.Kg/mol)

⇒ mb = 200.656 mol/Kg

∴ mass solvent = 750.0 g - 58.125 g = 691.875 g = 0.692 Kg

moles solute:

⇒ nb = (200.656 mol/Kg)*(0.692 Kg) = 138.83 mol solute

molecular weight:

⇒ Mb = (58.125 g)/(138.83 mol) = 0.42 g/mol

8 0
3 years ago
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