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Bogdan [553]
2 years ago
5

Define Physical and Chemical change

Chemistry
1 answer:
vlada-n [284]2 years ago
7 0

Answer:

Explanation:

Chemical is when there is a change of color odor or temperature rises

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The proper name for a carbohydrate polymer with 2 subunits is
valentina_108 [34]
Carbohydrates are classified in three major categories depending upon the number of sub units joining to form them. These are,

                                                Monosaccharides

                                                Oligosaccharides

                                                Polysachharides

The simplest single units are monosaccharides, if units are ranging between two and twenty they are called oligosaccharides and above twenty joining units they are called polysachharides.

Result:
          <span>The proper name for a carbohydrate polymer with 2 subunits is called Oligosachharide in general and Disaccharide in specific.</span>
8 0
3 years ago
What is the pH of a solution that has 7.8x10-9 [H+]?
xxTIMURxx [149]

Answer:

8.11

Explanation:

pH = -log[H+]

pH = -log[7.8 x 10^{-9}]

pH = 8.107905...

pH = 8.11

5 0
2 years ago
If a calcium supplement claims to have 200 mg of calcium per pill - how much mass if each pill if the supplement is a calcium su
arlik [135]

Answer:  mmmmmmmmmmmmmmmmmmmmmmmmmmmm

Explanation:

mmmmmmmmmmmmmm

7 0
2 years ago
What is related to the energy of motion of the particles of matter?
Amanda [17]
The Kinitec Molecular Theory of Matter 
Yes Kninetic energy
5 0
3 years ago
A reaction has a ΔH value of +120 kJ and a ΔS value of -42 J/K. At which of the following temperatures is the reaction spontaneo
ollegr [7]

Answer:

the reaction is spontaneous at T > 2900 K

Explanation:

  • ΔG = ΔH - TΔS

∴ ΔH = +120 KJ

∴ ΔS = (-42 J/K)*(KJ/1000 J) = -0.042 KJ/K

∴ ΔG < 0 ⇒ the reaction is spontaneous

⇒ at T = 2900 K:

⇒ ΔG = 120 - (2900)(-0.042) = 120 - 121.8 = - 1.8 KJ < 0

6 0
3 years ago
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