A new penny has a mass of 2.49 g and a volume of 0.349 cm3. Is the penny made of pure copper?

What is the relationship between the following compounds?

What is an effective way to slow down or stop this reaction in aqueous solution? NaOH (aq) + KCI (aq) - > NaCI (aq) + KOH (aq) increase the pressure of the reaction mixture increase the surface area of the reactants add a catalyst to the reaction

Your body contains vast numbers of carbon atoms. How is it possible that some of these carbons may have been part of the body of a prehistoric creature?

Magnesium element has three isotopes: 24Mg, 25Mg, and 26Mg. The natural abundance of the isotopes on Earth is 78.99% 24Mg with a mass of 23.985 amu, 10.00% 25Mg with a mass of 24.985 amu, and 11.01% 26Mg with a mass of 25.9825 amu.

What would happen to the relative amount of unsaturated lipids in a plasma membrane when e. coli bacteria grown at 25 degrees celsius are then grown at 37 degrees celsius?

Where might you find a temperature of 2 kelvin? a. north poleb. the equatorc. earth's cored. the coldest regions of outer space

A blank is a coil of wire that produces a magnetic field when it carries an electric current

What is the change in heat energy when 132g of copper at 32.2°C is raised to 45.0oC? The specific heat of copper is 0.385 J/g °C.

Polar covalent bonds are formed when the electrons in the bond are not shared equally between the two nuclei. which one of these molecules contains polar bonds?

The flame from my candle gives off black smoke heat and light what type of changes do these indicate