The cooling of a refrigerator happens because of the heat flow towards the cooler object. Therefore, the heat flows into the refrigerant. This is as expected according to what law?

During chemistry lab, Mrs. Black's students placed an antacid tablet in a zip lock bag. They recorded the mass of the tablet in the bag. Then they carefully added 50 grams of water and quickly sealed the bag.

A bottle contains 6.23 g of copper turnings. The mass of a length of magnesium ribbon is 6.23 g. Are there more copper atoms or more magnesium atoms present?

What would happen to a sealed bag of chips left in the sun?

The percent composition of all elements in HClO3 is: a. 2% H, 20% Cl, 78% O b. 1% H, 42% Cl, 57% O c. 2% H, 68% Cl, 30% O d. None of the above

Organic protein catalysts are called:

A mixture of 0.10 mol of NO, 0.050 mol of H2, and 0.10 mol of H2O is placed in a 1.0-L vessel at 300 K. The following equilibrium is established: 2NO (g) + 2H2 (g) ⥫⥬==N2 (g) + 2H2O (g) At equilibrium [NO]=0.062M.

Which statements accurately describe the polarity and electronegativity of water?

Which of the following could lead to static discharge? water molecules sticking together at a surface the force of gravity pulling an object to Earth a vibration compressing molecules of air the build up of electrons on the atoms of an object

Which requires the removal of heat, melting or freezing? Is it evaporation? What is it? Why?

Waves are the major force of erosion along coasts