When moving upward on an energy pyramid from one level to the next, what happens to the usable energy in an

ecosystem?

It increases by about 10%

It increases by about 90%

It decreases by about 10%

It decreases by about 90%

The ductility of a material is the measure of a) The amount of elastic deformation that can be sustained before yielding b) The capacity of a material to absorb energy when it is deformed elastically c) The degree of plastic deformation that has

Increased concentration increases the reaction rate. true or false.

Identify factors that account for the high phosphoryl‑transfer potential of the nucleoside triphosphates, NTPs.

7.55 grams of P4 and 7.55 grams of O2 react according to the following reaction: P4 + O2--> P4O6 If enough oxygen is available, then the P4O6 reacts further: P4O6 + O2 - -> P4O10 a. Find the limiting reagent in the formation of P4O10. b.

Chlorine and fluorine reacts to form gaseous chlorine trifluoride. You start with 1.75 mol chlorine and 3.68 mol fluorine. a) write a balanced equation.

Consider the two electron arrangements for neutral atoms A and B. What is the difference between atom A and atom B? A - 1s22s22p63s1 B - 1s22s22p65s1 Atom B has lost some inner electrons.

Choose all the answers that apply. Which of the following has kinetic energy? rolling ball, moving car, book on a table, spinning top, or a falling tree.

Which of the following statements about the suns feature is true?

Preteins vary widely in structure, whereas nucleic acids have rather uniform structures. How do you account for this major difference?

Convert the pressure 0.840 atm to mm Hg