(i need this answered quickly! i will give brainliest if you're answer is correct! and maybe extra points! )

you can tell a triple-beam balance is level when the
a. three beams are all lined up
b. balance tips back to the right
c. object does not slide off the pan
d. pointer lines up with the white line labeled 0

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

The boiling point of liquids is very high what does it indicate

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