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3 years ago

This is a sign of a chemical reaction that involves a new color being created during the reaction.

1 answer:

5 0

Hey there!

When two or more substances combine, they create one or more new substances, which sometimes have different molecular structures from the original substances, meaning they absorb and radiate light in different ways, leading to a color change.

Hope this helps! :)

You might be interested in

Water freezing is an exothermic process? tue or false

Aliun [14]

Answer:

Explanation:

When water becomes a solid, it releases heat, warming up its surroundings. This makes freezing an exothermic reaction.

So the correct answer is True

8 0

3 years ago

The Calories on a food label indicate the

marusya05 [52]

Answer:

chemical energy

Explanation:

5 0

3 years ago

You will analyze four substances in this lab. Based on their chemical formulas and what you already know about covalent and ioni

Phoenix [80]

Answer: Oil: covalent

Cornstarch: Covalent

Sodium chloride: Ionic

Sodium bicarbonate: Ionic

Explanation: Covalent compounds are formed by sharing of electrons between non metals whereas ionic compounds are formed by transfer of electrons from metals to non metals.

1. Oil, which is built from the nonmetals hydrogen, carbon, and oxygen: forms a covalent compound by sharing of electrons between non metals hydrogen, carbon, and oxygen. Covalent compounds are insoluble in water.

2. Cornstarch, a carbohydrate consisting of hydrogen, carbon, and oxygen: forms a covalent compound by sharing of electrons between non metals hydrogen, carbon, and oxygen. Covalent compounds are insoluble in water.

3. Sodium chloride (table salt), whose formula is NaCl is formed by transfer of electrons from sodium to chlorine.Ionic compounds are soluble in water.

4. Sodium bicarbonate, whose formula is $NaHCO_3$ is formed by transfer of electrons from sodium to $HCO_3$ .Ionic compounds are soluble in water.

7 0

3 years ago

Read 2 more answers

What happened to the average length of the potato cylinders (increased/decreased/remained the same) as the concentration of salt

exis [7]

Answer:

Increased

Explanation:

3 0

3 years ago

Read 2 more answers

How much energy in Joules is released by burning a cheese ball that raises the temperature of

aliya0001 [1]

Answer:

1. The heat energy in Joules is 5280.22J

2. The heat energy in calories is 1261.4 calories

Explanation:

Step 1:

Data obtained from the question.

The following data were obtained from the question:

Mass of water (M) = 74.2 g

Initial temperature (T1) = 24°C

Final temperature (T2) = 41°C

Change in temperature (ΔT) = T2 - T1 = 41 - 24 = 17°C

Heat energy (Q) =?

Recall:

Specific heat capacity of water = 4.186 J/g°C

Step 2:

Determination of the energy in Joules.

This is illustrated below:

Q = MCΔT

Q = 74.2 x 4.186 x 17

Q = 5280.22J

Step 3:

Conversion of the heat energy in Joules to calories. This is illustrated below:

4.186 J = 1 calorie

Therefore, 5280.22J = 5280.22/4.186 = 1261.4 calories

3 0

3 years ago