Which of these is not an example of a biotic part of the ecosystem? a. grass b. birds c. insects d. weather

What is the density of a block of marble that occupies 228cm3 and has the mass of 987g

How does the plate boundary along the west coast of the United States change over time?

How many moles of Hg will be produced from 34.0 g of HgO?

An open box of bandages is on the floor. Bandages wrappers are found nearby, what chemical treatment do you use.

What is the average mass (in grams) of a lithium atom?

Balance the following redox reaction in acidic solution. Zn (s) + MnO-4 (aq) → Zn+2 (aq) + Mn+2 (aq)

66.0g of dry ice (solid carbon dioxide)

Select all the discoveries for which ernest rutherford is credited. the emissions of radioactive elements the neutron the electron the proton

Calculate the concentration of a solution made by diluting 86.0 mL of 4.4 M HBr to a final volume of 575.0 mL. Significant figures are graded for this problem. Be sure you do not round your answers until the very end of your calculations.

Hear flows from water in one container to another. What difference between the two samples of water causes heat to flow?