The identity of an element can be determined by observing its emission spectrum. True False

Which one is an accurate list of the major organic molecules? a. lipids, minerals, proteins, sulfuric acid b. carbohydrates, lipids, proteins, nucleic acids c. nutrients, nucleic acids, carbon, oils d.

How many electrons would it take to equal the mass of a proton?

What is the difference between a cast fossil and a mold fossil?

A 39 liter SCUBA tank contains 310 grams of oxygen gas (O2, molar mass = 32.0 g/mol) at 19°C. Calculate the pressure in kiloPascals (kPa).

What kind of evidence indicates a chemical change? ... a physical change? you may use examples to show softened.

Density is not a physical property of mass. True False

Does skin have a nucleus true or false

Bacteria are only found in decaying matter. A. True B. False

Which is considered a chemical mutagen? tanning beds tobacco X-rays precious metals

Combining 0.380 mol Fe2O3 with excess carbon produced 13.7 g Fe Fe2O3 + 3C → 2Fe + 3CO What is the actual yield of iron in moles? What is the theoretical yield of iron in moles? What is the percent yield?