1) 1.644 kg Express your answer using three significant figures.

2) 74.2587 L
Express your answer using three significant figures.

3) 0.00268756 cm
Express your answer using three significant figures.

4) 8907 m
Express your answer using three significant figures.

Often on a topographic map, every fifth contour line is darkened. what is this line called? a. key b. slope c. benchmark d. index contour

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

What was bohr’s contribution to the planetary model