An object has a mass of exactly 5g on an analytical balance that has an accuracy of 0.1 mg. To how many significant figures should this mass be recorded

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

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?

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled