Which is the limiting reactant in the following chemical reaction 4 NH3 + 5 O2 , if 4 grams of O2 is used and 2 grams of NH3 is used? aO2
bNO
cNH3
dH2O

If a || b and e || f, what is the value of y ?

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

Melting 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.