Chemistry High School

Which of the following is a chemical change?
melting of ice
burning of wood
breaking of glass
Evaporation of water

Answers

Answer 1
The answer is burning of wood.
Answer 2

Answer:

The answer is burning of wood

Explanation:

just took the quiz

Related Questions

PLEASE HELP WITH THESE THREE (30 POINTS)
1) How is the number of neutrons in the nucleus of an atom calculated?
A. Add the number of elections- and protons+ together
B. Subtract the number of elections- from protons+
C. Subtract the number of protons+ from the atomic mass number
D. Add the atomic mass number to the number of elections-


2) Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr) are in the same group on the periodic table. Why? *
A. They have the same size.
B. They react with each other.
C. They have similar properties.
D. They have the same number of protons

3) Which of the following elements would be a transition metal?
A. Ca
B. Au
C. Rb
D. Fr

Answers

1.B
2. C
3. A

i had the test with the same exact questions

Kernels of corn are heated and become popcorn. Why is this a chemical change?

Answers

Answer:

When popcorn is popped, liquid inside the kernel is changed to steam. Pressure from the steam builds up inside the kernel. When the pressure reached a critical stage the kernel pops turning itself inside out. This is a physical change.

Explanation:

Because it’s not a physical change

Temperature and kinetic energy have a relationship.

Answers

Answer:

[tex]\boxed {\boxed {\sf Temperature=Average \ kinetic \ energy}}[/tex]

Explanation:

Temperature is also known as the average kinetic energy in a substance.

If there is an absence of heat in a substance, the particles move slower and the kinetic energy decreases. The temperature will be lower, because there is less kinetic energy.

If heat is present or applied, the particles move more, so kinetic energy increases. The temperature will be higher, since there is more kinetic energy.

So, the relationship is: temperature is the measure of average kinetic energy.

Answer:

DIRECT

Explanation:

Moritz is watching his little brother play in a mud puddle. Moritz notices that when his brother stirs it with a stick, after a few moments the dirt settles back to the bottom of the puddle. His brother is creating a . Anjali knows that whole milk has more fat than skim milk. However, the solid fat doesn’t seem to separate from the liquid milk even after it has been in the fridge for a few days. This is evidence that milk is a .

Answers

Answer:

1. suspencion

2.colloid

Explanation:

Answer:

Moritz is watching his little brother play in a mud puddle. Moritz notices that when his brother stirs it with a stick, after a few moments the dirt settles back to the bottom of the puddle. His brother is creating a SUSPENSION.

Anjali knows that whole milk has more fat than skim milk. However, the solid fat doesn’t seem to separate from the liquid milk even after it has been in the fridge for a few days. This is evidence that milk is a COLLOID.

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