Iron has a density of 7.874 g/cm3 what is the mass of a rectangular block of iron with dimensions of 3.000 cm by 4.000cm by 5000cm

Gases and liquids will both expand to fill their container true or faulse

How much energy in joules does it take to raise the temperature of 255g of water by 12.5C

If you started with 1000 units of a radioactive element that has a half-life of 2,500 years, how many half-lives will the material have gone through in 7500 years? (Show work and explain answer).

Methane burns in oxygen to yield carbon dioxide and water. The chemical formula for this reaction is CH4+2O2→CO2+2H2O. What is the product, or what are the products, of this reaction? a. water and methane b. carbon dioxide and water c.

How many moles (of molecules or formula units) are in each sample? Part A 42.37 g CF2Cl2 Express your answer to four significant figures.

In a short circuit as the resistance decreases what happens to the current?

Describe the characteristic of chemical structure found at the core of each steroid hormone

A molecule has one carbon-carbon double bond and four monovalent atoms or groups. how many different geometric isomers exist for this molecule?

While waiting for your car to warm up one winter morning, you notice a liquid dripping from your tailpipe. You recently learned in chemistry class that combustion reactions occur in car engines.

Which of the following correctly describes how metals behave in an ionic bond? Metals lose their valence electrons and form positive ions. Metals lose their valence electrons and form negative ions.