Answer: container of zinc and oxygen
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Explanation: edgenuity
Answer:
85.5%
Explanation:
To get the experimental value, you need to convert 15.0 grams of Na2SO4 to grams of Na3PO4. You do this with stoichiometry.
Convert grams of Na2SO4 to moles with molar mass. Then convert to moles of Na3PO4 with the mole-to-mole ratio according to the balanced chemical equation. Then convert moles of Na3PO4 to grams with the molar mass.
15.0 g Na2SO4 x (1 mol/142.04 g) x (2 Na3PO4/3Na2SO4) x (163.94 g/1 mol) = 11.7 g Na3PO4
Percent Yield = (actual value/experimental value) x 100
Actual Value = 10.0 g
Experimental Value = 11.7 g
10.0g/11.7 g = 85.5%
Answer:
Atomic number= 8
Atomic mass= 16
Explanation:
You can determine the atomic number by counting the number of protons. Atomic mass is determined by adding the protons and neutrons together.
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A chemical reaction occurs when mixing water and alka seltzer together. The key hint is that there are bubbles which signify there is gas formation. A chemical reaction normally occurs when there is a temperature change, a color change, or gas formation. Remember that adding hot water, adding food coloring, or stirring vigorously to create bubbles does not mean that the reaction is a chemical reaction. It must solely be a result of the two chemicals combined and not out of human interference. Hope this helps!
