1. ch4 + 2o2 → 2co2 + 2h2o = balanced or unbalanced
2. sno2 + 2h2 → sn + h2o = balanced or unbalanced
3. 4al + 3o2 → 2al2o3 = balanced or unbalanced
4. n2 + 3h2 → nh3 = balanced or unbalanced
5. 2zn + 2hcl → zncl2 + h2 = balanced or unbalanced
6. 4fes + 7o2 → 2fe2o3 + 4so4 = balanced or unbalanced
7. 2 agi + na2s → 2ag2s + 2nai = balanced or unbalanced
8. ca3(po4) + 2h2so4 → 2 caso4 + ca(h2po4) 2 = balanced or unbalanced

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

Aman applies a force of 500n to push a truck 100m down the street how much does he do?

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?