Mass = volume x density
volume = πr²
since Diameter = 2.5 cm
then radius = 1.25cm
∴ volume = π x (1.25cm)³
≈ 6.1359 cm³
Thus mass = 6.1359 cm³ x 11.34 g / cm³
= 69.58 g
Answer: Changing the amount of solute and volume of solvent we can change physical properties of the given salt water solution.
Explanation:
Physical properties are defined as the properties which does not cause any change in chemical composition of a substance. For example, density, mass, volume, etc are all physical properties.
When we take a salt water solution then on adding more amount of salt into the water there will occur change in density of the solution as density is mass present per liter of solution.
Also, if we add more amount of solvent then there will occur change in volume of the solution.
Hence, in both the cases physical properties of the solution are changing and no change in its chemical composition is taking place.
An indicator shows where the endpoint of a titration is. Different indicators will change colors at different equivalence points. Phenolphthalein will change colors at around pH7.5 or so, and others like Methylene Blue will change around a pH of 6. Different titrations will have different pH's at different equivalence points.
Answer:
1. H-O-H H-H
Explanation:
1. A water molecule is one oxygen connected to two hydrogen atoms, while a hydrogen molecule is two hydrogen atoms connected to each other.
