For the following organic reaction identify the mystery reactant R, its stoichiometric coefficient N, and any other substance X that must be present. CH3 CH3 CH2 =C-c=CH – CH3 + NR CH3-CH-CH - CH2 -CH3 CH3 CH3 Chemical formula of R: Stoichiometric coefficient N: yes Must any other substance X be present? no If you said an additional substance X must be present, enter its chemical symbol or formula:

Consider the reaction 3X + 2Y → 5C + 4D With excess Y, how many moles of X are needed to produce 13.00 moles of D?

▾ Part A Combustion analysis of toluene, a common organic solvent, gives 3.52 mg of CO2 and 0.822 mg of H₂O. If the compound contains only carbon and hydrogen, what is its empirical formula? Express your answer as a chemical formula. ΑΣΦ A chemical reaction does not occur for this question. Submit Request Answer Part B ? Menthol, the substance we can smell in mentholated cough drops, is composed of C, H, and O. A 5.025x10-2-mg sample of menthol is combusted, producing 0.1415 mg of CO2 and 5.795×10-2 mg of H₂O. What is the empirical formula for menthol? Express your answer as a chemical formula. ΑΣΦΑ ? A

Elemental SS reacts with O2O2 to form SO3SO3 according to the reaction 2S+3O2→2SO3

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The actual yield can only be determined by: 8°F Mostly cloudy O Writing a balanced equation. O Calculating the theoretical yield and plugging into the percent yield. O Reviewing past reactions. O Carrying out the reaction in a laboratory. O Search H

Answer the following questions about the chemical reaction shown below.O3 (g) + H2O (g) →  H2 (g) + 2 O2 (g) ΔH = 3.0 kcal/mol A flask contains the components of the reversible chemical reaction shown above, at equilibrium. Describe how the system will respond if each of the following stresses are applied. a) The flask is heated. ________________________________________________ b) The pressure in the flask is increased. ________________________________ c) Oxygen gas is selectively removed from the flask. _____________________

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2 C2H4  +  6 O2  -->  4 CO2  + 4 H2O From the above reaction, how many moles of O2 are required for the complete combustion of 44.88 g of C2H4? a. 1.3 ×102  mol b. 3.00 mol c. 4.8 mol d. 11.25 mol

Question 49 In 1-2 sentences, explain what the Arrhenius equation tells us. Use the diagram to help describe what you mean. 100 °C - room temperature (300 °K) k, = Ae¯FalRT (373 °K) 4 kJ/mol (1 kcal/mol) 40 kJ/mol (10 kcal/mol) 80 kJ/mol (19 kcal/mol) → energy (E) Edit Format Table 12pt v Paragraph v BI Ų Av ev T? v * s fraction of molecules having energy E