How many moles of Al2O3 will be formed when 27 grams of Al reacts completely with O2?

When using a manometer to check boyle's law, why is the pressure changed slowly? a. to avoid compressing the liquid b. to avoid compressing the gas c. to avoid changing the gas temperature d. to avoid changing the mass of the gas

The number of d-electrons in Fe2 + (Z = 26) is not equal to that of A. p-electrons in Ne (Z = 10) B. s-electrons in Mg (Z = 12) C. d-electrons in Fe (Z = 26) D. p-electrons in CI (Z = 17)

Describe the physical and chemical changes may be affected by temperature

The visible spectrum for a colored solution has a maximum absorbances around both 440 nm and around 600 nm and a minimum absorbance between 510 and 540 nm. What is the color of the solution?

Which substance can not be decomposed by ordinary chemical means? (1) methane (3) ethanol (2) mercury (4) ammonia

How many moles of al2o3 are formed when 0.78 mol o2 reacts with aluminum?

The dissociation of a weak electrolyte is suppressed when

There are seven major levels of classification. Kingdom and Phylum are just two of the levels. Which of the following are also major levels of classification? Choose all answers that are correct. A. Class B. Order C. Family D. Level

An experiment with high validity is

What is the smallest part of a tree that can do all the things needed for life?