An athlete is running a 5-km race at am average speed of km/h. She has to stop to tie her shoe. After tying her shoe, she continues running at 8km/h. Why would her average speed for the entire race be less than 8km/h

As an employee of a summer sports camp, one of your jobs is to prepare the tank of vitamin water for use throughout the day. the mixture calls for 75% pure water and 25% concentrated vitamin drink.

How does a redox titration compare to a normal (acid-base) titration? How is it different?

Which statement describes a chemical reaction? Reactants form products when atoms change state. Products form reactants when atoms change state. Reactants form products when atoms are rearranged. Products form reactants when atoms are rearranged.

Which type of rock forms as a result of cooling and crystallization? a) clastic b) metamorphic c) sedimentary d) igneous

What is a diamond's scientific name

It would take one light year to travel to the sun? True or false?

A specific, electrically neutral atom of boron has 5 protons, 5 electrons, and 6 neutrons. what is the mass number of this atom of boron? 6 5 11 16

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.

Nuclei with too many or too few neutrons are?