30. A5.30 g of Na2CO3 is dissolved in a 400.0 mL solution. What is the molarity for this solution? A. 0.0133 M
B. 0.0500 M
C. 0.125 M
D. 13.3 M

Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).

What is the relationship of air masses and the temperature of oceans?

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?