In addition to Earth, which planet has evidence of water on the surface? (one Answer)Thank you
Mars
Mercury
Neptune
Saturn

What is the composition, in atom percent, of an alloy that consists of 4.5 wt% pb and 95.5 wt% sn? the atomic weights for pb and sn are 207.19 g/mol and 118.71 g/mol, respectively.(a) 2.6 at% pb and 97.4 at% sn(b) 7.6 at% pb and 92.4 at% sn(c)97.4 at% pb and 2.6 at% sn(d) 92.4 at% pb and 7.6 at% sn

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate