The weights of chickens for sale in a shop are normally distributed with a mean of 2.5
kg and a standard deviation of 0.2 kg. A
chicken is chosen at random. Find the
probability that it weighs more than 2.8 kg.
(5 pts) *
O 0.1814
O
0.0668
O 0.0228
O 0.2514​

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons