What is the formula of a binary compound?

a. koh
b. al2s3
c. naclo3
d. bi(no3)3

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

How did planetesmals form planets? a. they broke apart into smaller chunks.b. they collided and stuck together.c. they cooled and pulled ice together.d. they began to rotate.

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device