Calculate the amount of heat required to raise the temperature of an 64 g sample of water from 32 ∘C to 69 ∘C.

30 Which radioisotopes have the same decay mode and have half-lives greater than 1 hour? (1) Au-198 and N-16 (3) 1-131 and P-32 (2) Ca-37 and Fe-53 (4) Tc-99 and U-233

Explain why the word atom was an appropriate term for democritus's idea.

The chemical formula for aluminum hydroxide is Al (Oh) 3. How many hydrogen atoms are present in 1 molecule here?

What happens to the particles in a substance during a ohysical change

Convert $1.89/gal to dollars per liter

Which exerts greater pressure on the floor-standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed,

1. Sara tells Michael she is 160 centimeters tall, while Michael says he is 60 inches tall. If there are 2.54 centimeters in an inch, who is taller

How do you tell if a compound is polar or non polar

What two ions are central to the arrhenius definitions of acids and bases?

Question 1 A process in which suthetances chemically rearrange to form new substances o Molecule Energy o Organism O Chemical reaction O Matter O Cellular respiration