Chemistry; convertions
radio waves travel at the speed of light which is 3.00x10^8 m/s. how many minutes does it take for a radio message to reach earth from saturn if saturn is 7.9x10^8 km from earth?
a. 4.4.x10^-2 min
b. 1.6x10^5 min
c. 4.0x10^15 min
d. 44 min
e. 2.6 min

How much heat is released upon converting one mole of steam (18.0 g) from 100.0 ∘c to water at 25.0 ∘c? show work and constants, trying to figure out how it works. only given the heat capacity for steam and water so try to only use that

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.