The radius of a niobium atom is 131 pm. How many niobium atoms would have to be laid side by side to span a distance of 1.47 mm?

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %