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

As the masses of two objects decrease, how does the gravitational force between the two bodies change? A. The gravitational force increases. B. The gravitational force decreases. C. The gravitational force begins to repel the objects. D.

The embryo refers to an undeveloped animal or plant. True or false

It has been determined that the body can generate 5500 kJ of energy during one hour of strenuous exercise. Perspiration is the body's mechanism for eliminating this heat.

A 186 mL sample of a 0.275 M solution is left on a hot plate overnight. The following morning, the solution is 1.10 M. What volume of solvent has evaporated from the 0.275 M solution?

The solid-state transition of Sn (gray) to Sn (white) is in equilibrium at 18.0 ˚C and 1.00 atm, with an entropy change of 8.8 J K-1 mol-1. The density of gray tin is 5.75 g cm-3; that of white tin is 7.28 g cm-3.

The volume of oxygen required for complete combustionof a mixture of 5 cm3 of ch4 and5 cm3 c2h4

What part of the digestive system removes most of the water from food? Question 4 options: Small intestine Stomach Large intestine Esophagus Save

In which type of chemical bonding are electrons shared among all atoms in the substance?

As pressure decreases, density: A. decreases B. increases C. remains the same

Use the unbalanced equation NH3+O2--> NO+H2O to find the mole ratio between NH3 ad O2