What is true about a chemical equation? select all that apply1. you can count the number if molecules2. you can count the number of atoms3. you can see how the products combine to form reactants

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize