1 for specific request mail
CHEM 105 Exam 1 Questions and Correct Answers |
Latest Update
precision Ans: how close together diff measurements are
accuracy Ans: how close measurements are to actual result
substance Ans: kind of matter w/ uniform properties
atom Ans: fundamental unit of a substance
molecule Ans: two or more atoms held in specific shape by attractive
Assignment Expert
forces
ex: H2O
Guru01 - Stuvia
elementary substance Ans: substance w/ only atoms of same atomic
number
2026
ex: H2
compound substance Ans: substance w/ more than one type of atom
©
ex: glucose
chemical formula Ans: elements listed w/ number of atoms as subscript
molecular substance Ans: forms distinct molecules
ionic compound Ans: -forms crystalline substance w/ repeating formula
unit
-metal w/ nonmetal
-ions attracted to each other by electrostatic attractions
ex: NaCl
diatomic elements Ans: H2
, 2 for specific request mail
N2
F2
O2
I2
Cl2
Br2
matter Ans: anything taking up space and having mass
Assignment Expert
density Ans: mass/volume
Guru01 - Stuvia
temperature conversions Ans: C to K: add 273.15
F to C: C=5/9(F-32)
extensive properties Ans: depends on sample size
2026
ex: mass, weight
©
intensive properties Ans: characteristic of a substance, doesn't depend
on sample size
ex: color, density, temp
physical properties Ans: observed without change in composition of
substance
ex: density, color, hardness, MP, BP, electrical conductivity
chemical properties Ans: only evident if substance goes through
chemical change
ex: enthalpy of combustion, flammability, toxicity, acidity
chemical change Ans: requires new substance before and after
CHEM 105 Exam 1 Questions and Correct Answers |
Latest Update
precision Ans: how close together diff measurements are
accuracy Ans: how close measurements are to actual result
substance Ans: kind of matter w/ uniform properties
atom Ans: fundamental unit of a substance
molecule Ans: two or more atoms held in specific shape by attractive
Assignment Expert
forces
ex: H2O
Guru01 - Stuvia
elementary substance Ans: substance w/ only atoms of same atomic
number
2026
ex: H2
compound substance Ans: substance w/ more than one type of atom
©
ex: glucose
chemical formula Ans: elements listed w/ number of atoms as subscript
molecular substance Ans: forms distinct molecules
ionic compound Ans: -forms crystalline substance w/ repeating formula
unit
-metal w/ nonmetal
-ions attracted to each other by electrostatic attractions
ex: NaCl
diatomic elements Ans: H2
, 2 for specific request mail
N2
F2
O2
I2
Cl2
Br2
matter Ans: anything taking up space and having mass
Assignment Expert
density Ans: mass/volume
Guru01 - Stuvia
temperature conversions Ans: C to K: add 273.15
F to C: C=5/9(F-32)
extensive properties Ans: depends on sample size
2026
ex: mass, weight
©
intensive properties Ans: characteristic of a substance, doesn't depend
on sample size
ex: color, density, temp
physical properties Ans: observed without change in composition of
substance
ex: density, color, hardness, MP, BP, electrical conductivity
chemical properties Ans: only evident if substance goes through
chemical change
ex: enthalpy of combustion, flammability, toxicity, acidity
chemical change Ans: requires new substance before and after
