Write a paragraph about yourself as a student. Start by sayi…
Write a paragraph about yourself as a student. Start by saying your name and what you study. Imagine you are in the room shown and describe what is there. (Alternatively, you can use what what is in the room where you are right now). Remember to use “hay” to say there is or there are. You should have at least 6 sentences.
Read DetailsThe element X has three naturally occuring isotopes. The ma…
The element X has three naturally occuring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below: Isotope Abundance (%) Mass (amu) 79X 50.7 78.9183 81X 49.3 80.9163 What is the average atomic mass (amu) of element X?
Read DetailsConsider the combustion of methane, CH4. CH4 (g) + 2 O2 (…
Consider the combustion of methane, CH4. CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g) If 17 grams of CH4 reacts completely with 25 grams of O2, what total mass (in g) of products should form according to the Law of Conservation of Mass?
Read DetailsA 25.0 g sample of each of three metals is added to 25.0 mL…
A 25.0 g sample of each of three metals is added to 25.0 mL of water in graduated cylinders A, B, and C, and the final volumes are as shown below. Following are the densities of the three metals, in no particular order: Zn = 7.14 g/cm3 Fe = 7.87 g/ cm3 Ni = 8.91 g/ cm3 Given the densities of the metals, which metal is in cylinder C?
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