A 270.0 gram piece of copper is dropped into 300.0 grams of water 24.00 °C. If the final temperature of water is 42.00 °C, what was the initial temperature of the copper piece?

Specific heat of copper = 0.39 J/g °C

257 °C

272 °C

302 °C

313 °C

Do elements of the halogen family lose one electron to become halide ions

The air in a 4.00 L tank has a pressure of 1.20 atm. What is the final pressure, in atmospheres, when the air is placed in tanks that have the following volumes, if there is no change in temperature and amount of gas? The second voulme is 2500 mL

The complete ionic equation for the reaction of aqueous sodium hydroxide with aqueous nitric acid is

Try using Zn (solid) with Cu (NO3) 2 in one cell and Cu (s) with Zn (NO3) 2 solution in another cell. Note down the voltage value. Explain what you are seeing for voltage value and use redox reaction to justify the process.

Why can metallic elements bend, while solid but non-metallic break or crumble?

Students measuring the mass of a rock record 6.759 g, 6.786 g, 6.812 g, and 6.779 g. Which other measurement of the block's mass would be most precise? A. 6.702 g B. 6.781 g C. 6.605 g D. 6.858 g

What two elements make up dihydrogen monoxide?

What did scientists observe using the earliest microscopes

Which statement describes the redox reaction that occurs when an object is electroplated? A. It is spontaneous and requires an electric current. B. It is spontaneous and produces an electric current. C.

How are electromagnetic different than all other waves