Biphenyl, C12?H10 (molar mass =154.22 g/mol ), is a non-volatile, nonionizing solute that is soluble in benzene, C6?H6? (molar mass =78,12 g/mol ). At 25°C, the vapour pressure of pure benzene is 100.84 tort. What is the vapour pressure, in tort, of a solution made from dissolving 15.2 g of biphenyl in 31.3 g of […]

What is the mole fraction of solute in a 3.66 m aqueous solution?5.You need to dissolve CaCl2 in water to make a mixture that is 38.0% calcium chloride by mass. If the total mass of the mixture is 832.9 g, what masses of CaCl2 and water should be used?6. What is the mole fraction, X,

The Table Shows The Velocity Of A Bicyclist Riding For 30 Seconds. Use The Right Riemman Sum To Estimate The Distance Using 3 Intervals Of Length 10. Time (See) Velocity Ft Sec) 0 5 10 15 20 25 30 8 127 29B 222 170 Ft 630 It 200 Ft 170 Ft 230 Ft MacBook Air

What are hydrophobic molecules (or hydrophobic molecular regions)? What are hydrophilic molecules? How can they be described in relation to their polarity? The Correct Answer and Explanation is : Hydrophobic molecules, or hydrophobic molecular regions, are those that repel or do not interact favorably with water. These molecules are nonpolar, meaning they lack regions of

An abnormal lateral curvature of the spine is called scoliosis, as shown in figure 15.10, which can be treated by wearing a brace before the completion of skeletal growth. predict possible consequences of this type of spinal curvature if left untreated. The Correct Answer and Explanation is : Correct Answer:If scoliosis is left untreated, it

A ketone may react with a nucleophilic hydride ion source (e.g., LiAlH or “H”) and, subsequently, a proton source (e.g., H2O or “H+”) to give a secondary alcohol. Given the labeled ketone, determine the atom that is attacked by the hydride and proton. H 888 R1 C V A % 5 B Which atom is

What is the oxidation number of Pin Ba(H2PO4)2? A +1 B. +2 C. +3 D. +4 E. +5 F. +6 The Correct Answer and Explanation is : The correct answer is A. +1. To understand why, let’s break down the oxidation numbers in Ba(H₂PO₄)₂, which is barium dihydrogen phosphate. Therefore, the oxidation number of Ba

What is the difference between a histogram and a bar chart? There is no difference. Histograms and bar charts are interchangeable. A histogram is used to display quantitative data and a bar chart is used to display qualitative data. Histograms have distinct gaps between the bars and bar charts have no gaps between the bars.

Let R be a shaded region in the first quadrant enclosed by the y-axis and the graph of y=1-x³ and the graph of y= tan(x) as shown 1 2 in the figure. (a) Find the area of R. (b) The horizontal line y = k, is draw through the point where the 1 graphs of

The normal body temperature of human beings is __: [A] 96.4 °F [B] 97.4 °F [C] 98.4 °F [D] 99.4 °F The Correct Answer and Explanation is : The correct answer is [C] 98.4 °F. Explanation: The normal body temperature of human beings is generally considered to be around 98.6 °F (37 °C). However, in