Which of the following measurements contains two significant figures? a. 0.0004 00 l b. 0.0004 04 l c. 0. 44 l d. 0.0004 40 l

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Find the number of moles of argon in 364g of argon.