How many moles are there for 1.81 × 1024 Na2CO3 molecules. The molar mass of Na2CO3 is 105.99 g/mol.

What are the 4 phases of matter in order of increasing engery content?

4786 joules of heat are transferred to a 89.0 gramsample of an unknown material, with an initialtemperature of 23.0°c. what is the specific heat of thematerialif the final temperature is 89.5 °c?

Plz a person walks 1 mile every day for exercise, leaving her front porch at 9 am and returning to her front porch at 9: 25 am what was the total displacement of her daily walk a. 1 mile b. 0 c. 25 min d. none of the above