Name an element or elements in the periodic table that you would expect to be chemically similar to potassium.

If an isotope of an element has 18 neutrons and a mass number of 35, how many electrons must it have?

In a candy factory, the nutty chocolate bars contain 22.0% by mass pecans. If 5.0 kg of pecans were used for candy last Tuesday, many pounds of chocolate bars were made?

Choose the best classification of the reactions C6H12O6 (g) + 6O2 yields 6CO2 + 6H2O

How many significant figures should the result have 2.524 g (5.1 • 106 g)

The gas in a 250. mL piston experiences a change in pressure from 1.00 atm to 4.45 atm. What is the new volume (in mL) assuming the moles of gas and temperature are held constant

If 294 grams of FeS2 is allowed ti react with 176 grams of O2 according to the following equation how many grams of Fe2O3 are produced? FeS2 + O2 = Fe2O3 + SO2

Convert 3.57 moles of aluminum to grams

An average microwave uses a frequency of 2.54 GHz. How much energy is emitted?

Why scientist form a hypothesis

Step two of the procedure states: "Using sterile technique, place a loopful of inoculum from the M. luteus culture in the drop of nigrosin and mix." Which of the procedures qualifies as sterile technique?