ch.1 and e

Question 1

conversion: how many joules (J) per calorie (cal)

Answer 1

4184J/cal

Question 2

conversion: how many centimeters (cm) per inch (in)

Answer 2

2.54 cm/in

Question 3

conversions: how many milliliters (mL) per centimeters cubed (cm^3)

Answer 3

1 mL/cm^3

Question 4

milli

Answer 4

10^-3

Question 5

centi

Answer 5

10^-2

Question 6

deci

Answer 6

10^-1

Question 7

nano

Answer 7

10^-9

Question 8

micro or weird u

Answer 8

10^-6

Question 9

kilo

Answer 9

10^3

Question 10

conversions: how many kilojoules (kJ) per kilowatthr (kWh)

Answer 10

3600 kJ/kW*h

Question 11

scientific law

Answer 11

chemist generates similar observations by experiments that leads to the development of a scientific law, that summarizes past observations and predicts future ones

Question 12

Which concept was demonstrated by Rutherford’s gold foil experiment?

Answer 12

Atom’s mass is concentrated in a very small space.

Question 13

Pure substances

Answer 13

do not have a variable composition and contain only a single component, either an element or a molecule

Question 14

mixture

Answer 14

have a variable composition and contain two or more different components

Question 15

Elements

Answer 15

cannot be broken down into simpler substances

Question 16

compounds

Answer 16

can be broken down into simpler substances and contain more than one element

Question 17

homogeneous mixture

Answer 17

is composed of two types of particles that are dispersed uniform

Question 18

heterogeneous

Answer 18

is composed of two types of particles that are located separately

Question 19

law of conservation of mass

Answer 19

states that matter is neither created nor destroyed in a chemical reaction

Question 20

mass number (A)

Answer 20

protons (Z) +neutrons

Question 21

atomic number (Z)

Answer 21

of protons

Question 22

atomic symbol

Answer 22

mass number (A) on top left, atomic number (Z) on bottom left, and chemical symbol (X) on right

Question 23

Conversion: how many feet (ft) per mile

Answer 23

5280 ft/mile