The mole is a counting number that allows scientists to describe how individual molecules and atoms react. If one mole of atoms or molecules is equal to 6.022 × 1023 atoms or molecules, how many molecules are in a 23.45 g sample of copper (II) hydroxide, Cu(OH)2?  (MM of Cu(OH)2 is 97.562 g/mol)  Express your answer to the correct number of significant figures and you must show all work in the form of dimensional analysis

DUE NOW. Please answer it with the correct significant figures. Thank you!

n3 of 14 Phosphorus reacts with oxygen to form diphosphorus pentoxide, P,0,. 4 P(s) + 5 0,(g) - → 2 P,0,(s) How many grams of P,O, are formed when 3.83 g of phosphorus reacts with excess oxygen? Show the unit analysis used for the calculation by placing the correct components into the unit-factor slots. 言 性 料 E 3.83 g P × = g P,O, 自 自 5. 2 .... 雪 Answer Bank 32.00 g O2 141.94 g P2O5 4 mol P 30.97 g P 1 mol P205 2 mol P205 1 mol O, 5 mol O2 1 mol P , , AT- rs .** r a s W, e | | contact us | help about us privacy policy terms of use careers MacBook Air

An amount (in grams) of nitrogen gas is reacted with excess hydrogen, according to the balanced reaction shown below.  If 104 g of NH3 is recovered, giving a percent yield of 42%, what was the mass of the nitrogen (in grams) that reacted?   N2 (g) + 3 H2 (g) -->  2 NH3 (g)   Report your answer as an integer, that is as a number with zero decimal places, and with no units.  Do NOT use scientific notation.

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.

Solid sodium reacts violently with water producing heat, hydrogen gas and sodium hydroxide. How many molecules of hydrogen gas are produced when 65.4 g of sodium are added to water? 2Na(s) H I ||| + 2H₂O → 2NaOH, Normal Enter your answer here (aq) + H 2(g) X₂ X² 20 Ix BIUS

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

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