Magtanong at makakuha ng maliwanag na mga sagot sa IDNStudy.com. Hanapin ang mga solusyong kailangan mo nang mabilis at madali sa tulong ng aming mga eksperto.

Problem Solving
Directions: Show the equation used to solve each problem. Round
off the atomic mass to the nearest tenth.
1. Write the general mathematical formula that can be used to
calculate the percent composition by mass of any substance.

2. Use the atomic mass of the elements to determine the percent
composition by mass of sodium and chlorine in sodium chloride.
Sodium = Na = 23.0 g
=
Chlorine = Cl = 35.5 g
Sodium
Chloride = NaCl = 58.5 g

3. Use the atomic mass of the elements to find the percent
composition of hydrogen in H2O.
Hydrogen = H = 1.0 g x 2 H = 2.0 g
Oxygen = 0 = 16.0 g
=
Water = H2O = 18.0 g


Sagot :