If the temp. of 63.4 grams of water changes from 22.3C to 28.7C, how many joules of heat are involved? Show work

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

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

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?