The table lists the distances of some of the nearest stars. Some Nearby Stars
Star
Distance from the Sun
(light-years)
4.2
Proxima Centauri
6.0
Barnard's Star
7.7
Wolf 359
8.6
Sirius A
10.4
Ross 248
Based on the table, a student used a measuring tape to model the distances between the sun
and these nearby stars. The sun was at the starting point. Proxima Centauri was at the 10 m
mark
Which star was closest to the 20 m mark in this model?

15) a substance used in manufacturing gasoline consists of finely divided platinum supported on an inert solid. suppose that the platinum is formed by the high temperature reaction between platinum (iv) oxide and hydrogen gas. the other product is water. a) write and balance the equation b) how many grams of hydrogen are needed to produce 1.0 g of platinum metal? c) how many moles of water are produced at the same time? how many grams? ( show work, .)