A chemical reaction gives off 2,100 kJ of heat energy.

About how many calories is it equal to?

(1 calorie=4.18 Joules)

5.0 * 10³ calories

5.0*10^4 calories

5.0*10^5 calories

5.0*10^6 calories

Determine the number of moles of compound in each of the following samples.? 4.50g H2O 471.6g Ba (OH) 2 129.68g Fe3 (PO4) 2

Name four components of the blood

Why are very high temperatures and pressures required for fusion to occur? to generate the neutrons that are needed to break the nuclei to overcome the repulsion between the protons in the nuclei that join to maintain the proper conditions to keep

A student needs to prepare 50.0 mL of a 1.30 M aqueous H 2 O 2 solution. Calculate the volume of 5.0 M H 2 O 2 stock solution that should be used to prepare the solution.

What are the advantages of using structural composite lumber rather than solid lumber?

The dissolution of barium hydroxide in water is an exothermic process. Which of the following statements is correct? A) The enthalpy of solid barium hydroxide plus pure water is less than that of the solution, at the same temperature.

What's the Compound for CO?

How to measure a bag of flour

If the pH of a wine is too high, say, 4.0 or above, the wine becomes unstable and has a flat taste. (a) A certain California red wine has a pH of 3.5, and a certain Italian white wine has a pH of 2.9.

Sodium hydroxide reacts with carbon dioxide as follows: which is the limiting reactant when 1.85 mol naoh and 1.