If 89.6 joules of heat are needed to heat 20 g of iron from 30 c to 40 c, what is the specific heat of the iron in j/cg

How can you get rock salt to dissolve in water quickly?

A sample of nitrogen gas, occupies a volume of 400ml at 2 atm pressure. What pressure must be applied to compare the gas to a volume of 200ml at constant temperature and fixed amount of gas

Give an example of a funny chemical change that you would do in your room? Explain why?

Ludwig Boltzmann developed a model that relates entropy to: Select the correct answer below: a. the spontaneous heat flow accompanying a process to the temperature at which the process takes place b.

A compound contains 69.94 percent iron and 30.06 percent oxygen. what is its molecular formula if the molar mass of the compound is 199.55 grams per mole?

Target tissues of hormones are always near the glands that release the hormones. true or false

What four things affect the tides

What fraction of the enzymes will be active at ph=4.07 explain?

The temperature of a liquid is measured to be 212 °F. Soon afterward, the temperature is taken again and is determined to be 100 °C. Which of these is a possible true statement about the motion of the liquid's particles? A.

In a solution at 25°C, the [H+] is 3.5 * 10-6 M. What is the [OH-]?