Why are metallic and ionic substances harder to melt than covalent substances

What is the percent by mass of solution formed by dissolving 50.0 g of glucose in 1000g of water?

What happens to a substance if it is oxidized during a chemical reaction? What is a reducing agent, and how would you identify it in a chemical reaction?

A thermometer is placed in a beaker full of water that has been sitting on the lab table for a few hours. The beaker is placed on a ring stand and heated over a Bunsen burner for 4 minutes. After 4 minutes, the temperature is taken again.

The ideal gas constant, R, can be found using which of the following equations? A. R = (nP) / (VT) B. R = (PV) / (nT) C. R = (nT) / (PV) D. R = (PT) / (nv) E. R = (nV) / (PT)

150.0 grams of iron at 95.0 °C, is placed in an insulated container containing 500.0 grams of water. The temperature of the water increases to 27.2°C. What was the initial temperature of the water? The specific heat of water is 4.

What is unique about the way that transition metals form compounds? a. They don't form compounds c. They can form bonds with the electrons in the two outer-most shells b. They are the most reactive d. They can donate all of their electrons

What prompted rutherford to do the alpha particle scattering experiment?

How many moles of hydrogen would be required to produce 5.0 mol of water?

What is the biggest difference between an exothermic and endothermic process? A. The direction of energy flow. B. The amount of energy transferred. C. The type of energy being transferred. D. The speed with which energy is transferred.

The mass of 1 mol of chromium (atomic mass 51.996 amu) is