What is true about energy in an ordinary chemical reaction? Energy is

created during the reaction.

destroyed if there is an explosion.

not created or destroyed.

used up by the reaction.

Many pain relief pills have powder that is enclosed inside a capsule. Why might this type of medicine work faster than a solid tablet if they both have the same amount and type of medicine? A.

Which effects would many organisms likely experience if global warming occurs? Check all that apply. disrupted food webs increased competition increased number of glaciers disrupted life-cycle events forced relocation

Which statement best characterizes chemical reactions? They always occur very quickly. Their rates vary significantly. Their rates are always slow. They rarely occur in the natural environment.

Which of the following describes the conversation of chemical energy to heat energy? a: a chair sitting still b: a leaf absorbing sunlight c: a battery powering a cell phone d: a rock hitting the ground

Find the volume of 0.100M hydrochloric acid necessary to react completely with 1.51g Al (OH) 3.

What is the primary function of neurons?

The decomposition of 11.0 g of fe2o3 results in

For the reaction: 2H2O2 → 2H2 + 2O2, what is the total number of moles of O2 produced from the complete decomposition of 8 moles H2O2? A) 2 moles B) 4 moles C) 8 moles D) 16 moles

If you have 15 grams of water, how many molecules of water do you have?

What is the volume of an object with a mass of 220g and a desnisty of 55cm3?