Which of the following choices would have a negative entropy change? A. H2O(s)−>H2O(l) B. CaCO3(s)−>CaO(s)+CO2(g) C. Fe2O3(s)+3C(s)−>2Fe(s)+3CO(g) D. N2(g)+3H2(g)−>2NH3(g)

What are four significant sources of ghgs that come from wostem washington?

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?