Solid copper(II) chloride forms a hydrate of formula CuCl2 ⋅ xH2O. A student heated a sample of hydrated copper(II) chloride, in order to determine the value of x. The following results were obtained:       mass of crucible = 16.221 g       mass of crucible and hydrated copper(II) chloride = 18.360 g       mass of crucible and anhydrous copper(II) chloride = 17.917 g   At. Mass: Cu 63.55   Cl 35.45   H 1.008    O 16.00  1.  Calculate the number of moles of anhydrous copper(II) chloride (answer must be expressed to 5 decimal places)

Molecules can be described as O heterogeneous mixtures. O homogeneous mixtures. two or more atoms chemically joined together. mixtures of two or more pure substances. h mixtures of two or more elements that have a specific ratio between components. Attemp 1 Ho 24/7 Po a

Determine the mol H2O/mol CaSO4 if you have the following data to two decimal places (MM H2O =18.02 g/mol; MM CaSO4 = 136.14 g/mol) mass of sample 1 mass of water in sample 0.23 mass of CaSO4 in sample 0.76

You must show calculations in the space pr receive credit. he line to 1. The following data was obtained by a student heating a mixture of BaCl2•2 H2O and an inert material. Calculate the percent of BaCl2•2 H2O in the sample 24.525 g 26.716 g 26.504 g olod slam Lo Mass of crucible Mass of crucible and mixture Mass of crucible and mixture after heating mby

Oil Ethanol and Water Water A student combines equal volumes of ethanol and water in a beaker and stirs the mixture. The student repeats this process but with equal volumes of oil and water in a different beaker. The student observes the contents of the beakers after they are mixed, as shown in the diagram. Which TWO of the following statements are consistent with the student's observations? Ethanol molecules and water molecules are both polar, so they mix well with each other. Ethanol molecules are nonpolar and water molecules are polar, so they mix well with each other. Oil molecules and water molecules are both polar, so they do not mix well with each other. D Oil molecules are nonpolar and water molecules are polar, so they do not mix well with each other.

CH,2, Zn(Cu) Et,0 CH,l,, Zn(Cu) Et,0

A test of an automobile engine exhaust revealed that 3.7g of NO2 was emitted in 10 minutes of operation. How many moles of NO2 would this engine release if it were used for a 45 minute commute, assuming that this measured number is representative of the emission under all circumstances

If you purchase 1 bottle of 120 tablets of 650. mg sodium bicarbonate in the pharmacy aisle  (the cheapest I found was $4.99), you are paying a significant amount of money for the bottling, capsuling and mark-up.  You can purchase for $28.99 at www.amazon.com 30.0 pounds of sodium bicarbonate.  How many bottles of tablets can you make out of the 30.0 lbs of NaHCO3 if you already have the capsules, labeling and bottles?      If you are able to sell each bottle for $4.99 , once subtracting the $28.99 for the cost of the sodium bicarb, what is the gross profit before other bills?

Which of the following statements is FALSE? The mass percentage of calcium in calcium phosphate is an extensive property. Mixtures can be separated into substances by physical methods. O Density is an intensive property. O Separations of a solid from a liquid by filtration is an example of a physical process. O The mass percentage of calcium in calcium phosphate is an extensive property.

Be sure to answer all parts. Nitroglycerin (C;H;N3O9) is a powerful explosive. Its decomposition may be represented by 4C H;N3O9 6N2 + 12CO, +10H,0 02 This reaction generates a large amount of heat and gaseous products. It is the sudden formation of these gases, together with their rapid expansion, that produces the explosion. (a) What is the maximum amount of O, in grams that can be obtained from 8.00 x 10 g of nitroglycerin? (b) Calculate the percent vield in this reaction if the amount of O, generated is found to be 26.3 g. 0/0