What do scientist do at their job?

Explain how molecules can just be elements or compounds

What are examples of a chemical reaction? Select all that apply. A (2AgI + Na2S → Ag2S + 2NaI B) 4FeS + 7O2 → 2Fe2O3 + 4SO2 C) H2O → SiO2 D) SnO2 → Sn + 2H2O

Contrast mixtures with pure substances

For the balanced equation shown below, how many moles of H2O will react with 0.2401 moles of C6G6HOS?

How many formula units are in 3.6 grams of NaCl?

Brianna wanted to compare the densities of two different solids of the same size 6cm3 (same volume) to see which one was more dense. Solid A had a mass of 2 grams and Solid B had a mass of 0.5 grams.

Which type of bond is present within a water molecule

Every oxygen atom has 8 electrons. what can you learn from the electron configuration of oxygen

If there is a loss of 5.63 x 10 - 7 kg of mass in a nuclear reaction, how many joules of energy would be released? Recall that C equals 3 times 108 m / s.

Why is it important that scientific knowledge changes?