6.8 kg of Water at 78 c is mixed with 4.2 kg of Ethyl alcohol at 35 c. The specific heat of water is 4,186 j/kg c. The specific heat of Ethyl alcohol is 2,500 j/kg c. Determine the final equilibrium temperature that will be reached.

In 2002, the rare earth elements mine in mountain pass, california was closed because

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied