125.0 grams of titanium solid and 125.0 grams of oxygen gas are mixed in a sealed container under combustion conditions. What is the limiting reactant? How many grams of TiO 2 will be made? How many grams of each reactant will be left over ?

Which of the following is a compound? a. carbon b. oxygen c. hydrogen d. water

How is 0.00235 expressed in proper scientific notation? a. 2.35 × 10-3 b. 0.235 × 10-2 c. 2.35 d. 2.35 × 103

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