Problem: An unknown mass of each of the following substances, initially at 230°C, absorbs 1980 J of heat. The final temperature is recorded as indicated. Find the mass of each substancePart A a Pyrex glass (Tf = 553°C) Express your answer using two significant figures.  Part B sand (Tf = 621°C) Express your answer using two significant figures ○Type here to searo,

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An unknown mass of each of the following substances, initially at 230°C, absorbs 1980 J of heat. The final temperature is recorded as indicated. Find the mass of each substance

Part A 

a Pyrex glass (Tf = 553°C) 

Express your answer using two significant figures.  

Part B 

sand (Tf = 621°C) 

Express your answer using two significant figures ○Type here to searo,