Which of the following is an example of how the same chemicals used to help people can harm the environment?
OA. Hillsides erode after plants are removed to clear a space for
O B. Phosphates are removed from detergents so they don't end up in
c. Excess fertilizers run off into rivers and create a dead zone.
OD. Plants grow back after toxic chemicals are removed from the
crops.
drinking water.
surrounding soil

Measuring which physical property is most likely to produce the most precise results when trying to identify a substance

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

According to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? view available hint(s) according to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? trigonal bipyramidal tetrahedral square planar determination of electron geometry requires information on whether the electron groups are lone pairs or bonding groups.