General Chemistry

Which property depends on the the amount of matter present?

• extensive

• intensive

• hardness

• mass

Tags

NGSS.MS-PS1-5

Which of the following is a example of extensive property?

• color

• density

• temperature

• weight

Suppose you have two white powders (Baking powder and baking soda) an you want to distinguish the two. How would you identify the given materials without tasting them?

• get their masses

• place them in water then observe

• touch them one by one

• none of the above

Using their properties mixtures can be separated too. When iron and wooden match mixed and you wish to separate them, how would it be possible?

• place them in water

• use magnet to attract the iron

• dissolve them in water

• get their densities

How can a mixture of sand, salt, water and paper be separated?

• I, II, and III

• II, I, and III

• III, II, and I

• III, I, and II

To what classification of properties of matter do the hardness, temperature , color, size, and smoothness belong to?

• State of matter

• Chemical Properties

• Physical Properties

• Elements and compounds

It is defined as how much substance dissolves in a given volume of liquid.

• density

• electric property

• magnetic property

• solubility

Suppose you have a bag of cans that you want to recycle. The recycling center accepts only aluminum cans. You know that some of your cans contains steel. You would probably find it difficult to tell aluminum cans from steel ones just by looking a them. How would you separate the cans?

• use magnet to separate aluminum from steel

• boil them to separate aluminum from steel

• place them in water to separate aluminum from steel

• all of the above

Typically, when two atoms form a chemical bond, the expected result is that the electrons

• will be in the excited state

• will be completely removed from both atoms

• will complete a noble gas configuration for both atoms

• all of the choices

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Given the formula for hydrazine, How many pairs of electrons are shared between the two nitrogen atoms?

• 1

• 2

• 3

• 4