How many moles of potassium are represented by 7.85 _ 1024 potassium atoms?

What is the mass of 2.30 * 1022 molecules of NaOH (Molar mass = 40.0 g/mol) ?

Which statements describe how chemical formulas, such as H2O, represent compounds? Select three options. They show the types of molecules that make up an atom. They show the elements that make up a compound.

When hcl (aq) is exactly neutralized by naoh (aq) at 25? c, the ph of the resulting solution is?

Single and double replacement

Describe the energy transfers and transformations that occur when a person rides a bicycle. Make sure to identify each example as an energy transfer or an energy transformation.

How many electrons will calcium gain or lose when it forms an ion?

Which statement describes thermal energy? the energy that is associated with electric fields the energy that is stored in chemical bonds the energy that is associated with the pull of gravity the energy that is associated with temperature

Give the formula %error = theoretical value - experimental value / theoretical value * 100 calculate the percent error for the experiment.

A baker touches a pie right after taking it out that of me which statement best explains why the pie feels hot

A scientist discovers a new type of polymer. What must be true about this polymer? A. It contains carbon atoms arranged in a ring structure. B. It has double bonds between all the carbon atoms. C. It contains molecules of many different types. D.