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Cheistry homework a 2.255 g sample of a mixture of CaCO3 and CaO was heated to completely decompose the CaCO3. After heating, the sample weighed 1.860g. What is the percent by weight of the CaCO3 in the sample Is this the question you were looking for? If so, place your order here to get started!

Limiting reactants help 2C8H18(g)+25O2(g)→16CO2(g)+18H2O(g) 0.130 mol of octane is allowed to react with 0.630 mol of oxygen. 0.454 mol of of oxygen was produced. What is the amount of octane left over after the reaction?   Is this the question you were looking for? If so, place your order here to get started!

KClO3 Chem Lab 1. Ignoring any side reactions and assuming the reaction occurs completely, how large (in kg) an oxygen candle (KClO3) would be needed to supply 8 people with enough oxygen for 24 hours on a small submarine? Although this depends on the size of the person and their respiration rate (activity), according to […]

atomic structure Heisenberg Proposed the Uncertainty Principle for Behavior of Electrons Werner Heisenberg proposed what’s known as the Heisenberg Uncertainty Principle. According to the Heisenberg Uncertainty Principle, it is impossible to measure certain properties, like momentum (speed multiplied by mass) and position at the same time without introducing uncertainty into the measurement. Of course, if […]

Mass balance A crystalliser process is used to recover sucrose from a concentrate. The concentrate has 85% sucrose and 1% other inert soluble solids. After cooling, some of the sucrose crystallises out and is separated from the remaining solution (called mother liquor) by centrifuge. The mother liquor stream contains 60% dissolved sucrose and the crystal […]

thermostats probs To xprsolutn 1. The ground level of Cl is 2P3/2 and a 2P1/2 level lies 881 cm–1 above it. Calculate the electronic contribution to the heat capacity of Cl atoms at (a) 500 K and (b) 900 K. 2. Calculate the equilibrium constant of the reaction I2(g) « 2 I(g) at 1000 K […]

Analytical Chemistry Part I Multiple Choice Questions (2 points each) 1.- Which of the following pairs of compounds and ions could be used to form a buffer solution? (a) 0.10 M HCl and 0.10 M NaCl (b) 0.10 M NH4Cl and 0.10 M NH3 (c) 0.10 M HNO2 and 1.0 x 10-4 M NaNO2 2.- […]

chemistry valency number Please describe to me about the concept of valency number Is this the question you were looking for? If so, place your order here to get started!

O chem epoxide Predict the oxidation product of treating the given alkene with a peroxyacid reagent. Omit byproducts. Is this the question you were looking for? If so, place your order here to get started!

Aldehydes and ketones Give the product expected when the following alcohol reacts with pyridinium chlorochromate (PCC). (Assume that PCC is present in excess.) Is this the question you were looking for? If so, place your order here to get started!