What type of reaction is Ca+HCl, CaCl+H2

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

What is the main reason why some developing countries fear the increase the free trade policies around the world?