3.) If it takes 3.0 Calories to increase the temperature of one gram of a substance 1 degree Celsius, how many Calories of heat must be added to 30.0 grams of the substance to increase the temperature
one degree Celsius? (No phase change takes place.)
a.) 20 Calories
b.) 90 Calories
c.) 60 Calories
d.) 3 Calories
e.) None of the above.

b. examine and describe cells

може ли да зареждате повече информация, моля

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.