Your answer is
Ca(OH)₂ + 2HNO₃ → Ca(NO₃)₂ + 2H₂O I hope it is at least :P
The motion causes day and night because the earth is constantly spinning on it's axis.
CBr4 is a symmetric tetrahedral molecule so it will be non-polar.
<span>The electronic configuration of cobalt is :1s2 2s2 2p6 3s2 3p6 3d7 4s2 </span>
It is correct, next time re-check your answer and don't second guess yourself. ;3
