During the reaction P4 + 5O 2 P4 O10, 1.5 moles of product was made in 30 seconds. What is the rate of reaction? a) 0.011 g/min
b) 210 g/min
c) 380 g/min
d) 850 g/min

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false