A substance made up of a combination of two or more elements held together by chemical bonds that can not be separated by physical means

A doctor examines a patient's sore throat and suggests that the patient has strep throat. She takes a sample to test for the bacteria that causes strep throat. What parts of the scientific method is the doctor applying?

Combustion of gasoline in automobiles produces poisonous gases. Catalytic converters that contain solid platinum, palladium, and rhodium change these poisonous gases into harmless gases.

In the following reaction, which compounds are considered acids? NH3+H2O NH4+OH A) NH3 and OH B) NH3 and H2O C) H2O and NH4 D) NH4 and NH3

91.12 Reactions cannot occur without a certain minimum amount of energy. What is this minimum amount of energy called?

How does the process of cell division replace damaged cells? A) Cells split into two new cells with the identical genetic makeup. B) Chloroplasts use carbon dioxide and water to create glucose.

During which phase of the moon do neap tides occur? O full O gibbous O new quarter

What is called what a scientist personal opinion affects the way experimental results are reported? A. Bias B. Classifying C. Inductive reasoning D. Procedure

Coffee is decaffeinated industrially using supercritical (sc) CO2. One advantage to using scCO2 is that the polarity of the supercritical fluid can be tuned by varying temperature, pressure and cosolvent additives.

The relationship between pressure and temperature of a gas, when volume and moles of a gas are held constant, is: P*T = k. TRUE FALSE

The system is said to be in dynamic equilibrium when: Select one: a. there is no longer any net change in the concentrations of products or reactants. b. the forward and reverse reactions come to a halt. c. None of these d.