How do experiments scientists learn about the world?
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a. experiments correct old ideas.
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b. experiments test the scientists' ideas.
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c. experiments explain scientific theories.
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d. experiments prove the scientists' hypotheses.

Which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology

Ineed to find the answer of this question because i dont understand it

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?