Write this number to two significant figures in scientific notation. Use the "^" character to indicate the exponent. 4.253

How can a reaction absorb energy to start but still be exothermic?

What is the molality of a solution that contains 63.0 g HNO3 in 0.500kg H2O?

What would be the number of oxygen atoms in 5.00 moles of co2?

A 65.0-gram sample of some unknown metal at 100.0° C is added to 177.1 grams of water at 24.5° C. The temperature of the water rises to 27.0° C. If the specific heat capacity of liquid water is 4.

Which processes occur during the second stage of technological design? Check all that apply.

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

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