Cards in this guide (18)
What is the importance of chemistry in our lives
What represents a number or value
the numerical part or digits represent some value
What property of matter is shown by the tin can when its hammered and rolled into a thin sheet
What is a homogeneous mixture that contains particles that scatter light
They are called "colloids". These have large particles that are
suspended in a solution.
The ability to become uniformly distributed describes what type of matter
The type of matter is a gas, because the particles in a gas are
spread or distributed far apart
What are the types of wires used for installation
Types of wire used in installations are copper and
aluminium.
What is the ability of a substance to be hammered or rolled into thin sheets is known as
The ability of a substance to be hammered into thin sheets is called malleability. The ability of a substance to be drawn into thin wires is called ductility.
Differentiate solute and solvent
Solute is the solid part of the solution. Solvent is the liquid
part of the solution.
Atoms that have filled outermost energy levels and do not participate in chemical bonding are called
What is the concentration of a solution in terms of solute per liter of solution
The molarity of a solution is the number of moles of a solute
per liter of its solution.
The normality of a solution is the number of gram equivalent
weight of a solute per liter of its solution.
As I said before, and precisely, Molarity is moles of solute per
VOLUME of solution!
When does molarity and molality become equal
In dilute solutions... ie closer a solution is to pure water the
closer molality and molarity come to equalling each other. This is
because the molality uses mass and molarity uses volume, the ratio
of these two (mass and volume) is density, and water has the
density of 1 therefore the mass and volume are equal to each other.
THEREFORE calculating the molarity of water is the same as
calculating the molality of water.
What is the Tyndall effect of sugar solution
Tyndall effect doesn't exist in a sugar solution.
Does the temperature indicates a degree of hotness or coldness of an object
Temperature indicates both a degree of hotness and coldness of
an object
Can hail break glass
Yes. Large hail can easily break glass.
What is equilibrium in Latin
From late Latin, aequilibrium, from the words aequus meaning
equal and libra a balance scale
How many significant numbers does 231.57 have
231.57 has five significant figures/numbers. All the numbers in
231.57 are significant.
Why is the size of a decimal number not necessarily determined by the number of decimal places notated
Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude.
Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude.
Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude.
Digits after (to the right of) the decimal point contribute to the accuracy of the number, not its magnitude (or size). So only the digits to the left of the decimal point contribute to the magnitude.
What is the scientific study of the composition structure and properties of matter and the changes that it undergoes
Chemistry is the scientific study of the composition structure and properties of matter and the changes that it undergoes.
