What is the power of 10 when 72,500 is written in scientific notation

In an endothermic reaction what is true of the enthalpy a) is has increased b) is has decreased c) it has remained uncharged d) it has at minimum been halved

When 0.876 g of CaCl2 (110.98 g/mol) is added to 95.0 g of water at 22.4 °C in a 'coffeecup' calorimeter, the temperature of the resulting solution increases to 29.7 °C. The specific heat capacity of the solution is 4.

Calculate the number of kilojoules to warm 125 g of iron from 23.5 degrees C to 78 degrees C

How many moles of barium hydroxide, Ba (OH2), would be required to react with 117 g hydrogen bromide, HBr?

What is the mass of one mole of H

Where do the heaviest elements in our solar system come from?

Four students presented different analogies to describe the formation of an ionic bond. Student A: A tug of war between seven middle school students and a high school student Student B: A small dog and a big dog tugging at a bone with equal strength

Chemical reactions occur when molecules or atoms collide so that the bonds between atoms break and new bonds form. breaking the bonds of the reactants requires energy; whereas, bond formation releases energy.

Calculate the volume of a 0.323-mol sample of a gas at 265 K and 0.900 atm.

What is the molar mass of the following substance : Cs2CO3