What represents of the number of protons in the nucleus of an element?

Which of the following is a decomposition reaction? BaO + H2O → Ba (OH) 2 CH4 + O2 → CO2 + H2O CaO + CO2 → CaCO3 PbCO3 → PbO + CO2

Students are each given a 20 gram sample of an unknown solid compound in a clear plastic bag. They are instructed to break the material into smaller parts by gently hitting it with a hammer.

Areas of the periodic table that contain elements that form cations in ionic compounds.

What are some of the problems with using flame tests as a way to identify substances?

Na + leaks through neuron membranes faster than k + because of the properties of the non-gated leak channels. na + leaks through neuron membranes faster than k + because of the properties of the non-gated leak channels. a. True b. False

Describe and give an example of parasitism.

Why is a dilute solution of oleic acid used instead of pure oleic acid?

The vapor pressure of benzene (C6H6) is 73.0 mm Hg at 25 °C. What is the vapor pressure of a solution consisting of 179 g of benzene and 0.217 mol of a nonvolatile nonelectrolyte?

Aldo drove 420 miles using 18 gallons of gas. at this rate, how many gallons of gas would he need to drive 357 miles

How many grams of As2S3 are in 3.25 moles?