The diameter of a sewing needle is 0.073 cm. What is the diameter in micrometers?

What main criterion determines major divisions in the geologic time scale? A. shifts in the position of Earth in its orbit B. the occurrence of huge events in Earth's natural history C. different stages in human evolution D.

Which element is oxidized and which is reduced in the following reactions? (Part A) N2 (g) + 3H2 (g) →2NH3 (g) Express your answers as chemical symbols separated by a comma. Enter the oxidized element first.

What do you mean by molar mass

What is the atomic mass of AlNO2?

When hydrochloric acid and zinc were combined, the flask was sealed and thus no gas could escape from the flask. why did the pressure decrease as the temperature decreased?

All of the following are true statements about heterogenous mixtures except for one. Which statement is false? A. An example of a heterogeneous mixture is muddy water. B. The particles of a heterogeneous mixture will not interact. C.

Name the following chemical compound. be (no3) 2

A chemical reaction adds a benzene ring to the third carbon of hexane. What hydrocarbon is formed?

What is the effect on vapor pressure of a solution with particularly strong solute-solvent interactions? With particularly weak solute-solvent interactions?

What is the mass of 3.62X10^24 molecules of methanol