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saveliy_v [14]
4 years ago
11

Does this sound good so far

Chemistry
1 answer:
bogdanovich [222]4 years ago
4 0
I think it looks good but some grammars are wrong i suggest trying to put it on grammarly and just check it out its just my suggestion and not doing this for points so you can delete this if it doesnt help
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What is a chemical change produced by heat
babymother [125]

Answer:

absorbes water

Explanation:

4 0
3 years ago
Concerning the 10.0 mL of 0.50 M NaCl to 100 mL of solution: When a solution is diluted, does it change the number of moles diss
Mars2501 [29]

No, the dilution does not change the number of moles dissolved

Explanation:

We can see that,

The molarity of the solution was 0.50 M

The volume of the solution is 10 ml.

No of moles of the solute was= volume * concentration

                                                   = 10 X 10^-3* 0.50

                                                     = 5*10^-3 moles

When the solution is diluted from 10 ml to 100ml, the molarity or concentration  changes but number of moles remains constant.

The molarity of 100 ml solution will be

c=n/V

  = 5*10^-3*/100*10^-3

  = 0.05

  when the solution is diluted to 100ml from 10 ml molarity changes from 0.5M TO 0.05 M

8 0
3 years ago
Read 2 more answers
acetone and ethanol Choose one or more: A. London dispersion B. dipole–dipole C. hydrogen bonding D. ion-induced dipole
andreyandreev [35.5K]

Explanation:

The weak intermolecular forces which can arise either between nucleus and electrons or between electron-electron are known as dispersion forces. These forces are also known as London dispersion forces and these are temporary in nature.

Dipole-dipole interactions are defined as the interactions that occur when partial positive charge on an atom is attracted by partial negative charge on another atom.

When a polar molecules produces a dipole on a non-polar molecule through distribution of electrons then it is known as dipole-induced forces.

Hydrogen bonding is defined as a bonding which exists between a hydrogen atom and an electronegative atom like O, N and F.

Chemical formula of acetone is CH_{3}COCH_{3}. Due to the presence of oxygen atom there will be partial positive charge on carbon and a partial negative charge on oxygen atom. Hence, dipole-dipole forces will exist in a molecule of acetone.

Whereas hydrogen bonding will exist in a molecule of ethanol (CH_{3}CH_{2}OH). Since, hydrogen atom is attached with electronegative oxygen atom.

Whereas London dispersion forces will also exist in both acetone and ethanol molecule.

3 0
3 years ago
Using solubility rules, determine if the following compounds are soluble in water. insoluble soluble A. CuCl2 B. BaSO4
Leviafan [203]

Answer :

(A) CuCl_2 : It is soluble in water.

(B) BaSO_4 : It is insoluble in water.

Explanation :

Solubility : It is defined as the amount of solute dissolved in a solvent at a given temperature.

According to the solubility rules:

All chlorides are soluble except Ag^+,Pb^+\text{ and }Hg^{2+}

All sulfates are soluble except Ba^{2+},Pb^{2+},Ca^{2+}\text{ and }Sr^{2+}

From this we conclude that,

(A) CuCl_2 : It is soluble in water.

(B) BaSO_4 : It is insoluble in water.

8 0
4 years ago
Why is it important that the nitrogenous bases (A, T, G and C) are weakly bonded together by hydrogen bonds?
NemiM [27]
During cell division, the DNA must be replicated, since the daughter cells need a complete set of DNA. To create TWO DNA, it must replicate. To replicate, DNA unzips, the bases pair up with a different base, and the backbone bonds.
5 0
3 years ago
Read 2 more answers
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