Which term describes free-floating, photosynthetic microorganisms in the oceans that are important for producing oxygen? A. phytoplankton B. yeasts C. pathogens D. protozoa

A formula that shows the simplest whole-number ratio of the atoms in a compound is the? a. molecular formula b. ideal formula c. structural formula d. empirical formula

What is the result of (6.2x10^4) x (3.3 x 10^2) expressed in scientific notation?

Which pair of elements do you expect to be most similar in their chemical properties? which pair of elements do you expect to be most similar in their chemical properties? ne and no and sibr and ik and fe?

Which part of a chemical formula indicates the number of copies of molecules or compounds?

How does a catalyst work? A) it shifts the reaction toward the products B) it changes the pressure of the products C) it increases the temperature of reactants D) it increases the temperature of the products E) it decreases the activation energy

Is it true or false that gamma rays have no mass and no electrical charge

True or False? Urea has a high solutiblity in water, due in part to its ability to form hydrogen bonds

Give a reasonable explanation why segments 2 and 4 are not associated with temperature increases even though heat is added a constant rate.

20.0 g of Nitrogen is produced when oxygen gas reacts with NO gas. 29.8 L of oxygen is required at STP to produce this 20.0 g of NO. A. yes B. false

What are some chemical properties of Nitrogen?