An antique coin is a mixture of silver and copper. the coin has a mass of 1.155 10-2 kg and in water weighs 0.1011 n. determine the mass of silver in the coin. use 1.05 104 kg/m3 as the density of silver, 8.89 103 kg/m3 as the density of copper, and 1000 kg/m3 as the density of water.

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

When balancing a chemical equation:

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