I believe it's C. Elements. Elements can't be separated by physical means unlike mixtures and solutions.
AnswerElement Symbol # of Atoms
Magnesium Mg 1
Oxygen O 4
Sulfur S 1
:
Explanation:
Answer:
42) 76
b)70
Explanation:
52) because you don't want to confuse different units. one ex)1cm is 1/ 100 of a meter
55) 1 km=1,000 meters
b) 10 decimterers = 1 meter
56)The SI standard for length is the meter the standard for volume is the cubic decimeter
ex) 1cm³=1mL
57) The two scales are the same. but there are no negative temperatures in Kelvin. 0 Kelvin is the lowest temperature possible.
0 Kelvin= -274.5 Celsius
35.453 (chlorine) + 10.811 (boron) = 46.264