What does pH measure?

A. The acidity of a solution

B. The ionic strength of a solution

C. The rate of a chemical reaction

D. The hydrogen atoms in a molecule

Megan experimented with growing mold. She took 3 pieces of bread from the same loaf and placed each into a plastic sandwich bag. Before sealing the bag. she added 5 drops of water to each slice.

Which process occurs when dry ice is changed into a gas

Lithium, beryllium, and boron are elements with atomic number 3, 4, and 5, respectively. Even though they are three of the five simplest elements, why are they rare compared to many heavier elements?

Explain the order of entropy of particles in the states of matter.

Which of the following is responsible for circulating air and ocean currents to the right in the northern hemisphere? A.) movement of the earths plates B.) the tilt of the earths axis C.) the coriolis effect D.) wind

Which of the following is an example of a molecule? F C Al O2

Organize the items listed into the proper sequence of events for gas exchange. a: O2 is transported to cells by circulatory system. b: O2 is drawn into the lungs during inhalation. c: Cells use O2 and generate CO2. d: CO2 is exhaled.

Research about the reaction of baking soda and vinegar

What mass (in mg) does 2.63 moles of nickel have? 3.56 * 105 mg 1.54 * 105 mg 2.23 * 104 mg 129 mg?

Given the propane molecule C3H8 (g) ! a) What is the balanced equation for the combustion of propane in O2? (20 pts.) b) What is the standard enthalpy change ΔH0 for the reaction at 25°C? (20 pts.