Grinding wheat in to flour is a a. physical change b. chemical change

What did scientists observe using the earliest microscopes

A thin square sheet of lead measuring 2.5 inches on each side weighs 525 mg. Find the thickness (in mm) of the sheet, given the density of lead to be 11.342 g/cc. (1 inch = 2.54 cm). Do not use scientific notion

Green uses the example of mandated ethanol in fuel as a case study in regulations gone wrong. How might Research, Development and Demonstration, emphasized by Schneider, have avoided the environmental problems associated with corn-based fuel ethanol?

When preparing a TLC slide of a reference standard material (RSM), a solvent or mixture of solvents is used to dissolve the RSM and transfer it into the TLC plate. How does its polarity affects the Rf of the RSM?

Which chemical equation correctly represents the synthesis of calcium sulfite from calcium oxide and sulfur dioxide?

Peas contain 250 kJ per 100 g. You would use the equivalent of 600 g of peas if you slept for.

A sample of gas in a balloon has an initial temperature of 21 ∘C and a volume of 1310 L. If the temperature changes to 70 ∘C, and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?

Which is a waste product of aerobic respiration? A. water B. energy C. oxygen D. glucose

Match the following: Part A 1. matter with no definite shape or volume 2. matter with no definite shape but with definite volume 3. the process of a solid changing directly to a gas without forming a liquid 4.

What is the mass in grams of 390 mL