Based upon the following equation: P4 + 5 O2 - - > 2 P2O5 How many grams of P4 (molar mass 124 g = 1 mole) are necessary to react with 6.8 grams of O2 (molar mass 32 g = 1 mole) ?

Explain how the number of chromosomes per cell is cut in half during meiosis in which the diploid parent cell produces haploid daughter cells.

Every cell is surrounded by a thin membrane. What is the main function of this cell membrane?

A how many hydrogen atoms are in an acyclic alkane with 7 carbon atoms?

The greatest amount of energy released per gram of reactants occurs during a (1) redox reaction (2) fission reaction (3) substitution reaction (4) neutralization reaction

Which is NOT one way used to collect empirical evidence? A. Sight B. Taste C. Extra sensory perception D. Hearing

A cylinder of oxygen gas contains 2.80 mol of 02. If the volume of the cylinder is 8.58 L, what is the pressure of the 02 if the gas temperature is 294 K.

A housefly's average life span is 3 days. How many minutes is that

The elements in Groups 1 AU) and 7A (17) are all quite reactive. What is a major difference between them?

A certain radioactive element has a half-life of one hour. if you start with 1.0 gram of the element at noon, how much of the radioactive element will be left at 2 p. m.? 0.50 grams 0.25 grams 0.125 grams 0.0 grams

Name two bases which react with dillute sulfuric acid to give zinc sulfate