The digits that are reported in an answer are called

While heating copper in the final step, the bright copper color changes to dull brown. Will percent recovery be too high, too low, or unaffected? Explain your answer

Gas exchange ... (choose all correct) Group of answer choices A. is a passive process B. is inversely related to surface area C. occurs across type II alveolar cells CO position D. does not affect gas exchange but affect the total blood O2

Which chemical equation best describes the reaction of potassium metal with fluorine gas to form solid potassium fluoride? A. K (s) + F2 (g) → KF2 (s) B. K (s) + F (g) → KF (s) C. K2 (g) + F2 (g) → 2 KF (s) D. 2 K (s) + F2 (g) → 2 KF (s) I guessed B

The number of mole of a molecule is defined as its mass per molar mass. Using # mol = n, mass = m and molar mass = M and given that n = M m, rearrange this expression for (a) M = ? (b) m = ? (c) If n = 0.

A 5.10 g sample of iron is heated from 36.0 to 75.0 C. The amount of energy required is 89.5 J. The specific capacity of this sample of iron is ... A.) 17800 J/g C B.) 0.900 J/g C C.) 11.7 J/g C D.) 0.450 J/g C E.) 2.22 J/g C

Small differences between parents and offspring accumulate over time. This process A. prevents parents from being able to care for their offspring. B. results in only one type of organism that has the exact same characteristics as its ancestors. C.

Use Boyle's, Charles's, or Gay-Lussac's law to calculate the missing value in each of the following. (a) V1 = 2.0 L, P1 = 0.62 atm, V2 = 1.0 L, P2 = ? atm (b) V1 = 230 mL, T1 = ?, V2 = 400. mL, T2 = 298 K K (c) V1 = 0.55 L, P1 = 740 mm Hg, V2 = 0.

Is potassium a metal metalloid or nonmetal?

How does protein substance in an animal hide or skin be prevented from bacterial infection during the process of tanning? * a. By soaking in water b. By deliming using an acid c. By brine curing d. By scudding with dull knife

Nonpolar materials have separated positive and negative areas. True False