a) Calculate the molar mass of sucrose, C12H22O11.(b) How many moles of sucrose are present in: (i)1.00 gram; (ii) 1.00 pound, and (iii) 1.00 kg of sucrose?(c) How many sucrose molecules are present in a 4.536-gsampleof sucrose?

Glucose CH2O, reacts with oxygen to give CO, and H,0. What mass of the oxygen (in grams) is required for complete reaction of 25.0 g of glucose? What masses of carbon dioxide and water (in gramy are formed? CHOg O-CO2+ H,0

(a) What is the mass, in grams, of 4.62  1023 molecules of aspirin, C9H8O4?  (b) What is the molar mass of diazepam (Valium(R)) if 0.05570 mol weighs 15.86 g?  g/mol (c) How many moles of ammonium ions are in 0.645 g of ammonium carbonate?

(6)For the following balanced reaction use the mass of the chemical provided to solve the mass of the chemical asked for.  6 CO2 +  6 H2O  -->  1 C6H12O6   +   6 O2   202 g of CO2 is consumed by a plant undertaking this photosynthesis reaction.  Find the mass of C6H12O6 produced.

A 19.51 g sample of impure methylamine, which contains 72.58% (by mass) of CH;NH: , is reacted with 30.81 g of pure oxygen gas: 2.1 4CH, NH,(2) + 90,(8) - 4C0,(8) + 10H,0(?) + 2N;(8) 2.1.1 What is the percentage yield of this reaction if 5.54 g of nitrogen gas is collected? 2.1.2 In another experiment, this impure methylamine was used as follows: • An unknown mass of the impure compound is dissolved in enough water to make 500.0 m of solution. • 20 ml of this solution was transferred by pipette to a clean 250 ml volumetric flask and made up to the mark. • The molarity of the CH;NH; in the final solution was determined to be 0.103 M. Determine the mass of CH;NH; present in the original amount of impure compound used make this solution.

Does the mass of the dried product(s) agree with the table included and the chemical equation: CaCO3(aq) + 2CH3COOH(aq) --> Can(CH3COO)2(aq) + CO2(g) + H2O(l)? if not, how can you account for the mass loss or excess mass? (Hint: No calculations needed)

Be sure to answer all parts. TCDD, also called dioxin (C H,Cl,O2, molar mass 322.0 g/mol), is a potent poison. The average lethal dose in humans is estimated to be 3.0 x 10- mg per kg of body weight. (a) How many grams constitute a lethal dose for a 91-kg individual? (b) How many molecules of TCDD does this correspond to? (a) X 10 g dioxin (b) x 10 molecules

6. Consider the following chemical reaction: 2 Cr(OH)3(aq) >Cr₂O3(s) + 3H₂0(1) 12.00 moles of chromium (III) hydroxide is decomposed. Calculate moles of the water produced. O 18.00 moles O 1.500 moles O 4.00 moles O 12.00 moles

Balance the following equations in which ethane, C2H6, burns in oxygen.    C2H6(g) + O2(g) --> C(s) + H2O(g)    C2H6(g) + O2(g) --> CO(g) + H2O(g)    C2H6(g) + O2(g) --> CO2(g) + H2O(g) d.   Explain why the coefficients for oxygen vary, depending on whether C, CO, or CO2 is formed.

Calculate the mass of silver bromide produced from 23.2 g of magnesium bromide in the following reaction: 2AGNO;(aq) + MgBr,(aq) - 2AgBr(s) + Mg(NO)2(aq)