How is the sequence of bases in DNA related to the sequence of amino acids in proteins?

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?

You open a can of soda at room temperature and hear a hiss. which of the following factors has changed inside the container? a.) atmospheric pressure b.) temperature of gas c.) type of gas d.) amount of gas

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon