How many molecules are contained in 19.3 g of H2SO4 (Given atomic masses: H 1.01, S = 32.06, O = 16.00). Answer in correct significant figures. 1.18 x 1023 H2SO4 molecules 1.184 x 1023 H2SO4 molecules 1.16 x 1025 H2SO4 molecules 3.12 x 1022 H2SO4 molecules =

Liquid hexane (CH,(CH,) CH,) reacts with gaseous oxygen gas (O2) to produce gaseous carbon dioxide (CO,) and gaseous water (H,0). If 42.3 g of carbon dioxide is produced from the reaction of 65.49 g of hexane and 143.2 g of oxygen gas, calculate the percent yield of carbon dioxide. Be sure your answer has the correct number of significant digits in it.

Part A A mixture of N2(g) and H2(g) reacts in a closed container to form ammonia, NH3(g). The reaction ceases before either reactant has been totally consumed. At this stage 3.4 mol N2, 3.4 mol H2, and 3.4 mol NH3 are present. How many moles of N2 and H2 were present originally? Express your answer using two significant figures. Enter your answers numerically separated by a comma nN₂,nH₂ = Ο ΑΣΦ Submit Request Answer Provide Feedback MacBook Pro ? mol

Butyric acid, C4H8O2, is a compound found in many fats and oils.  A 129.6 g sample of butyric acid is how many moles of butyric acid? Report the answer to 3 significant figures.

If the crucible originally weighs 3.715 g and 2.000 g of hydrate are added to it, what is the weight of the water that is lost if the final weight of the crucible and anhydrous salt is 5.072?  Do not include units and assume three decimal places for all numbers.  Remember to include the zero before the decimal if the number is less than one.

A chemist needs 32.0 g of phenol, C6H5OH, for an experiment. How many moles of phenol is this?   Explain how to find the molar mass of the compound. Explain how many significant figures your answer needs to have. The numerical answer

The mole is a counting number that allows scientists to describe how individual molecules and atomsreact. If one mole of atoms or molecules is equal to 6.022 × 1023 atoms or molecules, how many moleculesare in a 23.45 g sample of copper (II) hydroxide, Cu(OH)2? (MM of Cu(OH)2 is 97.562 g/mol) Expressyour answer to the correct number of significant figures and you must show all work in the form ofdimensional analysis as shown in Lesson 4. You must solve the problems as they are taught in the course.     4.2 Counting particles of matter.  Grams to moles of Copper Hydroxide to molecules of Copper Hydroxide.

Enter your answer in the provided box. Calculate the mass in kilograms of 64.6 mol of CuF2 · 2H2O. ______kg CuF2 · 2H2O