Which is true of a chemical equation? a. energy must be included in the beginning of the reactionb. subscripts must be used with all products and reactants c. coefficients must be used with all products and reactants d. products and reactants must be balanced

The length of a vector arrow represents its magnitude and the point represents its direction true or false apex

In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?