Know 24,0g calcium fire 20 9,14kcal ; 142g phosphor chas toa 74kcal; 16 8G Calcium Oxide works with 142g De nthophore Pentaoxide radiant 160.5k cal (thermal effect in the conditio n of the condition). Calculate the  standard of calcium phosphate cryst al? 

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

What is the standard unit of measure for acceleration?

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa