The temperature of a sample of water increases from 30.0 degrees C to 40.0 degrees C as 6540 joules of heat are added. What is the mass of the sample of water?

If you drop a ball from several different heights and note how high it bounces from each height what is the bounce height? A) dependent variable B) constant variable C) control variable D) independent variable

The same force is used to kick both of these objects below. Which will have greater acceleration? Bowling ball Soccer Ball They will accelerate the same Neither will accelerate

The formation of lithium fluoride (seen here) is due to A) a stronger pull by the lithium atom on its valence electron. B) increased stability in the completion of fluorine's outer shell.

Using the following combustion reaction, describe how it follows the laws of conservation of mass and energy. CH 4 + 2O 2 CO 2 + 2H 2 O+50.1kJ/g.

What is the electron configuration of an element with an atomic number of 9?

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

Find the ratio of speeds of an electron and a negative hydrogen ion (one having an extra electron) accelerated through the same voltage, assuming non-relativistic final speeds. Take the mass of the hydrogen ion to be 1.67*10^{-27} kg.

A type of rock that undergoes changes because of heat and pressure

How many milliliters of a 1.25 molar HCL solution would be needed to react completely with 60 g of calcium metal Ca+2HCl - - > CaCl2 + H2