What volume of methane gas (CH4) has the same number of atoms as 6.00 L of krypton gas (Kr) at the same temperature and pressure?

Which type of fossil does this image depict?

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt

Johnny's bakery has 30,900 grams of sugar. a recipe calls for 32 pounds of sugar to be used. how much sugar will be left over? (1 lb=453.59 g).