Describe the different abiotic and biotic parts of an ecosystem. Identify and explain what organisms lie on each of the trophic levels.

State the rules governing the number of significant figures that result from each of the following operations addition and subtraction; mutiplication and divison

A frog is the best jumper in the pond due to its long legs. What is true about this frogs heritable traits? A) its parents passed on genes for jumping distances through the chromosomes found in their gametes.

Hclo is a weak acid (ka = 4.0 * 10-8) and so the salt naclo acts as a weak base. what is the ph of a solution that is 0.089 m in naclo at 25 °c?

Which of the following is not a correct acid-base neutralization reaction? HI + KOH - -> KI + H20 Ca (OH) 2 + HCl - -> CaCl + H2O CH3COOH _ NH4OH - -> NH4CH3COO + H2O HBr _ CsOH - -> CsBr + H2O

What two quantities does the AVEE measure

2. An automobile tire has a pressure of 210 kPa at 293 K. What will be the tire pressure after driving, if the tire temperature rises to 308 K?

Students measuring the mass of a rock record 6.759 g, 6.786 g, 6.812 g, and 6.779 g. Which other measurement of the block's mass would be most precise? A. 6.702 g B. 6.781 g C. 6.605 g D. 6.858 g

What two elements make up dihydrogen monoxide?

What did scientists observe using the earliest microscopes

Which statement describes the redox reaction that occurs when an object is electroplated? A. It is spontaneous and requires an electric current. B. It is spontaneous and produces an electric current. C.