20 mL of 80°C water is mixed with 20 mL of 0°C water in a perfect calorimeter. What is the final temperature?

Using the mass of the proton 1.0073 amu and assuming its diameter is 1.0*10-15m, calculate the density of a proton in g/cm3.

Carbon and sodium chloride are both extended structures. What are the main differences between these two kinds of extended structures?

As matter changes, what happens to the energy?

If an element contains 8 electrons how many electrons will be placed in the 2nd valence shell? 6 2 8 5 11

How many liters of CH4 (g), measured at 22.6 ∘C and 768 mmHg, must be burned to provide the heat needed to vaporize 3.82 L of water at 100 ∘C? ΔcombH=-8.90*102kJmol-1 CH4. For H2O (l) at 100 ∘C, d=0.958gcm-3 and ΔvapH=40.7kJmol-1.

2. A balloon is dunked into a tank of cold water. How will this affect the size of the balloon?

Which of the following correctly describes a compound?

If the [H+] of a solution is 1.0 x 10 to the power of - 2 mol/L the pH is: (pH = - log (H+] 1 12 -2 2 chemistry

Change 5.20 moles of c3h6o2to grams

What factors can make atoms unstable