Other Chemistry Answers

calculate the energy of a photon of radiation with a wavelength of 6.4 * 10^-7

Ca(CO3)(aq) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)

If 0.0600 g HCl reacts with excess Ca(CO3), what amount (in moles) of CaCl2 will be produced?

(i) Why is Sodium kept immersed in Kerosene oil? [5]
(ii) Why do ionic compounds have high melting points?

How many molecules are present in 1.8 mol of sulfuric acid (H2SO4)? (You may use scientific notation. If your correct answer is e.g. 1189 enter 1.189E+3)

The statue of Martin Luther at Martin Luther College has a base that is 3.55 m2. The concrete is beginning to crack under the force because the statue exerts a pressure of 735. Pa. What is the force cracking the concrete?

How can we tell the temperature of the substance as it is being heated by the Bunsen burner?

Calculate the moles of calcium chloride (CaCl2) needed to react in order to produce 85.00 grams of calcium carbonate (CaCO3).

Juan argues that when you burn coal, you use up the coal, and hence you use up all of Its energy, and this results in a net loss of energy in the universe. How could you fix Juan's argument? The total energy in the universe remains constant because
A. the chemical energy of coal is converted to thermal energy
B. the kinetic energy of coal is converted to potential energy
C. the elastic potential energy of coal is converted to thermal energy D. the gravitational potential energy of coal is converted to elastic potential energy

Calculate the number of mass of phosphoric acid that is produced when 1.45 x1024 molecules of sulfuric acid react with calcium phosphate.

Ca3(PO4)2 + 3H2SO4 à 3CaSO4 + 2H3PO4