Nitrifying bacteria participate in the nitrogen cycle mainly by

Use VSEPR theory to decide which one of the following molecules and ions will definitely have at least one 90° bond angle in it. (In each case except water, the central atom is the first one in the formula.

All of the following are conditions that organisms in a tidepool must withstand except a. constant tidal changes b. temperature changes c. constant salinity d. changing salinity

If the heaviest isotope is more abundant and the other two isotopes were kess abundant what would happene to the atomic weight of beanium

How many grams of salt are in 5 L of a solution with a concentration of 3 g/L

A certain rock has a mass of 125 g. The rock is gently lowered into a graduated cylinder whose water level is 250 mL. When the rock is completely submerged, the water level rises to 300 mL What is the volume of the rock?

Why does a solution of a weak base and its conjugate acid act as a better buffer than does a solution?

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

Concentration measurements provide a quantitative measurement of the amount of solute that is dissolved in a given amount of solvent. True or false?

What type of bond will be formed for atoms that have a + 1 or - 1 charge?

Why a neutron is important