Answer:
Explanation:
the number above the letter is the atomic number and the other on the bottom is the atomic mass . and the mass number is the atomic mass . and protons is the number above the letter along with neutrons electrons you just do atomic mass - atomic number = electrons
example 1 -2= 1 so there is the atomic number of 1 and atomic mass of 2
let me know if this helps
Answer:
The molecules or ions in a solution can freely intermingle.
Explanation:
The reactant molecules and ions can move freely in solution, so thy are more likely to collide with each other and form products.
A is wrong. Solutions are homogeneous.
B and C are wrong. The statements are correct, but they are not the reason why reactions are carried out in solution.
D is wrong. Chemical reactions do not always produce a colour change.
F is wrong. Some chemicals react with water, so other (often flammable) solvents must be used.
The density of magnesium will be 1.74 g/cm³ if 23.5 g of magnesium occupies 13.5 cm³
<h3>What is Density ?</h3>
Density is the measurement of how tightly a material is packed together.
It is defined as the mass per unit volume.
Given ;
- Mass = 23.5 g
- Volume = 13.5 cm³
Formula to calculate density ;
Density = mass / volume
=23.5 / 13.5 = 1.74 g/cm³
Hence, the density of magnesium will be 1.74 g/cm³ if 23.5 g of magnesium occupies 13.5 cm³.
Learn more about density here ;
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We use the term formula unit for ionic compounds because ;
- Ionic compounds consist of cations and anions present in constant ratio ( C )
- Ionic compounds consist of continuous arrays of cations and anions ( D )
The molecule of an ionic compound gets attached to another molecule of an ionic compound via electrostatic force of attraction. this form of attraction between the molecules forms an arranged lattice structure. and due to this well arranged lattice structure an ionic compound can be termed as a Formula unit and not molecule.
Hence the correct options are as listed above
Learn more : brainly.com/question/14870624
The answer is A, a relationship between two variables
