Answer:
A
Explanation:
collision theory is a theory used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another
2 is right am 70 percent sure
Transcript of Physical and Chemical changeswhen baking a cake. The first change that occurs when you are baking a cake is a physical change. When you pour the cakebatter in to the pan/bowl, then add the water, the batter only changes its appearance from a solid to a liquid
Answer:
The density of this solution is 2.2 g/mL
Option 3 is correct
Explanation:
Step 1: Data given
Volume = 10.0 mL
mass = 22 grams
Step 2: Calculate the density
Density = Mass / volume
Density = 22.00 grams / 10.0 mL
Density = 2.2 grams / mL
The density of this solution is 2.2 g/mL
Option 3 is correct
Answer:
To find the number of neutrons we would subtract the number of protons from mass number of an atom.
Explanation:
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
For example:
The mass number of carbon is 12 amu and it has six protons thus to find the number of neutrons we would subtract the 6 from 12 and get number of neutrons.
12- 6 = 6 neutrons