Semester Review: Question Preview (ID: 5007)

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The safest way to dilute concentrated sulfuric acid is to add ---
a) a series of small volumes of water to the acid while stirring
b) the acid to water slowly while stirring
c) the acid to a small volume of water and then add more water
d) dilute the sulfuric acid to a small volume of the concentrated acid

Which of the following groups contains members with a similar chemical reactivity?
a) Li, Be, C
b) Be, Mg, Sr
c) Sc, Y, Zr
d) C, N, O

How man significant figures are in 302.50?
a) 2
b) 3
c) 5
d) 4

Change 2,8300g of Fe to moles.
a) 506 mol
b) 28300 mol
c) 50.6 mol
d) 28.3 mol

Which of the following is a chemical change?
a) Ice cracking
b) Sugar dissolving
c) Milk souring
d) Lead melting

A covalent bond is
a) a chemical bond in which on metal joins with a non metal
b) a chemical bond that involves sharing a pair of electrons between 2 non metals
c) a substance consisting of two or more substances mixed together
d) a pure substance consisting of one type of atom

Biochemistry is
a) the study of the carbon atom and the compounds it forms
b) the study of the chemical processes of living organisms
c) the study of compounds that do not contain carbon
d) a condition that is deliberatly change by the scientist to test the response in an experiment

It is ok to test 3 independent variables
a) true
b) false

Rutherford performed the goild foil experiement and found the electron
a) true
b) false

oxygen (O2) is an example of
a) an alloy
b) a molecule
c) a salt
d) a mixture

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