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3 years ago

Which two changes of state can occur when a substance gains thermal energy?

Chemistry

2 answers:

chubhunter [2.5K]3 years ago

7 0

Answer:

c and d

Explanation:

irinina [24]3 years ago

6 0

Answer:

Adding enough thermal energy to a substance can cause a change of state to occur. The change of state from a solid to a liquid is called melting. When energy is added to an ice cube, the ice particles speed up as energy is absorbed. When the particles move fast enough, the solid ice melts and becomes liquid water

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Determine whether each carbohydrate is best described as a monosaccharide, a disaccharide, or a polysaccharide

vazorg [7]

Answer options from an alternative source

fructose
lactose
starch
glucose
cellulose

Answer:

fructose -monosaccharide
lactose - disaccharide
starch - polysaccharide
glucose - monosaccharide
cellulose - polysaccharide

Explanation:

Monosaccharides are carbohydrates that are the simplest form of a sugar. They cannot be further broken down into smaller carbohydrates, and represent the basic building block for carbohydrates. Monosaccharides can form disaccharides, which are the sugar formed when two monosaccharides join together, or polysaccharides, which are chains of monosaccharides.

3 0

3 years ago

What is the molar mass of PCL3

antiseptic1488 [7]

The molar mass for PCL3 is 137.33 g/mol

8 0

2 years ago

The 54.9-g sample of the compound X2O7 contains 33.6 g of oxygen atoms. What is the molar mass of element X?

vazorg [7]

Mass of X₂O₇ = 54,9g

2x + 33,6g = 54,9g
2x = 54,9g - 33,6g
2x = 21,3g | :2
x = 10,65g/mol

7 0

3 years ago

Read 2 more answers

Help!?

wolverine [178]

I think to measure the age of the rock

6 0

3 years ago

Silver can be electroplated at the cathode of an electrolysis cell by the half-reaction. Ag+(aq)+e−→Ag(s) Part A Silver can be e

dmitriy555 [2]

Answer: Mass of silver deposited at the cathode is 37.1g

Explanation: According to Faraday Law of Electrolysis, the mass of substance deposited at the electrode (cathode or anode) is directly proportional to quantity of electricity passed through the electrolyte

Faraday has found that to liberate one gm eq. of substance from an electrolyte, 96500C of electricity is required.

$Ag^+$ +e− ==> Ag(s)

Given that

Current (I) = 8.5A

Time (t) = 65 *60 = 3900s

Quantity of electricity passed = 8.5*3900 =33150C

Molar mass of Ag= 108g

96500C will liberate 108g

33150C will liberate Xg

Xg= (108*33150)/96500

=37.1g

Therefore the mass of Ag deposited at the cathode is 37.1g.

3 0

3 years ago