Balance the following chemical reaction below. Bal2 + Pb3N2 = Ba3N2 + Pbl2
A. 1, 1, 3, 1
B. 3, 3, 1, 3
C. 1, 1, 3, 1
D. 3, 1, 1, 3
E. 1, 1, 1, 1

The arrival of in the early days of europa’s existence could have formed its ocean. it is likely that the water experienced similar to earth. it is also possible that this water is retained beneath europa’s surface and in its atmosphere due to europa’s . 1.) a. precipitation b. water vapor c. icy debris 2.) a. gravitational compression b. biochemical cycling c. radiogenic heating 3.) a, gravity b. magnetic field c. heat energy for plato

In the illustration, which two simple machines are being used to enable the student to reach the door? a. inclined plane and pulley b lever and wheel-and-axle c pulley and lever d wheel-and axle and inclined plane

Estimate of the number of stars in our galaxy