hands are very cold and the cup is very hot, heat energy transfers from the cup to her hands because

What is the term used to describe the number of protons plus the number of neutrons in an atom?

AlF3 is almost insoluble in anhydrous HF but dissolves if KF is present. passage of BF3 through the resulting solution causes AlF3 to precipitate ... can anyone explain the idea behind this?

A 0.25 m solution of the sugar sucrose (c12h22o11) in water is tested for conductivity using the type of apparatus shown. Bulb wires solution being tested plugged into wall outlet what do you predict will happen? 1.

A sample of metal has a mass of 12.9 grams and a volume of 29.8 ml. what is its density?

In general, what is the effect if increased temperature on the solubility of a gas

A/1 * B/C = D, You find yourself with 17 guilders (a gold coin) but you are planning on taking a trip to a country where the local currency is the florin. The current exchange rate is 2 guilders for every 3 florins.

The burning of wood in a fireplace generates heat and light in the form of flames. Which of the following terms best describes this type of reaction? a. condensation reaction b. exergonic reaction c. endergonic reaction d.

How are the number of protons and the number of neutrons related?

If a sample of copper with a density of 8.90 g/cm3 displaces 13.0 mL of water when placed in a beaker, what is its mass? a 1.46 g b. 0.685 g c. 116 g

Which statement accurately describes the origin and expansion of the universe