One similarity and one difference between an element and a mixture of elements

What is the name of the particles that make up all matter?

a) What is the common-ion effect? b) Given an example of a salt that can decrease the ionization of HNO2 in solution. List all of the substances (species) that would be present in the solution. (Consider the HNO2, the salt, and the water.)

Which statements describe how Becquerel, the Curies, and other scientists contributed to the cumulative understanding of radioactivity? Check all that apply. Becquerel showed that radioactivity is a form of phosphorescence.

The reaction that occurred when the antacid mixed with the HCl resulted in an additional product (besides a salt and water).

Is a producer a octopus?

Which average wind speed do areas need to effectively power wind farms? A:1 mph B:5 mph C:10 mph D:16 mph

What is the total number of moles represented by 20 grams of CACO3 A. 0.1 B. 0.2 C. 1 D. 2

Which describes the polarity in a water molecule? a). partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms b).

To what temperature in kelvin will a 2.3 L balloon have to be heated to expand to a volume of 400 L Assume the initial temperature of the balloon is 25 degrees celsius.

In which changes of state do atoms lose energy?