http://ejercicios-fyq.com/en/ Exercise Database for Physics and Chemistry en SPIP - www.spip.net http://ejercicios-fyq.com/en/?Solutions-concentration-of http://ejercicios-fyq.com/en/?Solutions-concentration-of 2011-05-10T17:07:34Z text/html en fyq Percentage by mass Molar concentration Molality Solutions Density <p>A concentrated hydrochloric acid containing 35.2% percentage by mass of HCl and its density is 1.175 . Calculate: a) The molarity and molality of the acid. b) The volume of the concentrated acid is needed to prepare a liter of solution 2 M.</p> - <a href="http://ejercicios-fyq.com/en/?-Solutions-" rel="directory">Solutions</a> / <a href="http://ejercicios-fyq.com/en/?+-Percentage-by-mass-+" rel="tag">Percentage by mass</a>, <a href="http://ejercicios-fyq.com/en/?+-Molar-concentration-+" rel="tag">Molar concentration</a>, <a href="http://ejercicios-fyq.com/en/?+-Molality-+" rel="tag">Molality</a>, <a href="http://ejercicios-fyq.com/en/?+-Solutions,31-+" rel="tag">Solutions</a>, <a href="http://ejercicios-fyq.com/en/?+-Density-+" rel="tag">Density</a> <div class='rss_texte'><p>A concentrated hydrochloric acid containing 35.2% percentage by mass of HCl and its density is 1.175 <img src="http://ejercicios-fyq.com/en/local/cache-vignettes/L57xH47/b0c90e618c5a73b874d62a38f5e85d62-463b9.png" style='height:47px;width:57px;vertical-align:middle;' width='57' height='47' alt="g/cm^3" title="g/cm^3" />. Calculate:</p> <p>a) The molarity and molality of the acid.</p> <p>b) The volume of the concentrated acid is needed to prepare a liter of solution 2 M.</p></div> <div class='rss_ps'><p>a) <b>11,33 M</b> ; <b>14,89 m</b></p> <p>b) <b>0,176 L</b></p></div> http://ejercicios-fyq.com/en/?Solutions-Osmotic-pressure-0001 http://ejercicios-fyq.com/en/?Solutions-Osmotic-pressure-0001 2011-05-10T17:00:17Z text/html en fyq Solutions Osmotic pressure <p>The osmotic pressure of a solution containing 4.6 g of solute in 0.5 L of solution is 2.36 atm at 57.2 ºF. Calculate the molecular weight of the solute.</p> - <a href="http://ejercicios-fyq.com/en/?-Solutions-" rel="directory">Solutions</a> / <a href="http://ejercicios-fyq.com/en/?+-Solutions,31-+" rel="tag">Solutions</a>, <a href="http://ejercicios-fyq.com/en/?+-Osmotic-pressure-+" rel="tag">Osmotic pressure</a> <div class='rss_texte'><p>The osmotic pressure of a solution containing 4.6 g of solute in 0.5 L of solution is 2.36 atm at 57.2 ºF. Calculate the molecular weight of the solute.</p></div> <div class='rss_ps'><p><b>M = 91.74 g/mol</b></p></div> http://ejercicios-fyq.com/en/?Solutions-Molarity-molar,92 http://ejercicios-fyq.com/en/?Solutions-Molarity-molar,92 2011-05-10T16:31:03Z text/html en fyq Molar concentration Solutions <p>Dissolve 20.36 g sodium chloride in the appropriate amount of water to obtain 250 mL of volumen, what is the molarity of the solution?</p> - <a href="http://ejercicios-fyq.com/en/?-Solutions-" rel="directory">Solutions</a> / <a href="http://ejercicios-fyq.com/en/?+-Molar-concentration-+" rel="tag">Molar concentration</a>, <a href="http://ejercicios-fyq.com/en/?+-Solutions,31-+" rel="tag">Solutions</a> <div class='rss_texte'><p>Dissolve 20.36 g sodium chloride in the appropriate amount of water to obtain 250 mL of volumen, what is the molarity of the solution?</p></div> <div class='rss_ps'><p><b>1.4 M</b></p></div> http://ejercicios-fyq.com/en/?Solutions-Molarity-molar http://ejercicios-fyq.com/en/?Solutions-Molarity-molar 2011-05-10T16:24:39Z text/html en fyq Mass concentration Molar concentration Solutions <p>Dissolve 12 g sodium chloride and flush the solution with the line in a volumetric flask to 250 mL. Determines mass concentration in g/L and molarity of solution.</p> - <a href="http://ejercicios-fyq.com/en/?-Solutions-" rel="directory">Solutions</a> / <a href="http://ejercicios-fyq.com/en/?+-Mass-concentration-+" rel="tag">Mass concentration</a>, <a href="http://ejercicios-fyq.com/en/?+-Molar-concentration-+" rel="tag">Molar concentration</a>, <a href="http://ejercicios-fyq.com/en/?+-Solutions,31-+" rel="tag">Solutions</a> <div class='rss_texte'><p>Dissolve 12 g sodium chloride and flush the solution with the line in a volumetric flask to 250 mL. Determines mass concentration in g/L and molarity of solution.</p></div> <div class='rss_ps'><p><b>c = 48 g/L</b> ; <b>0.82 M</b></p></div> http://ejercicios-fyq.com/en/?Solutions-of-gases-Partial,90 http://ejercicios-fyq.com/en/?Solutions-of-gases-Partial,90 2011-05-10T16:13:19Z text/html en fyq Solutions Partial pressure Gases <p>Mix 3 L (P = 1.2 atm and T = 59 ºF) of a gas A with 1.75 L (P = 0.98 atm and T = 89.6 ºF) of another gas B. What is the total pressure of the mixture if the volume of container is 4 L and the temperature is 77 ºF? What is the partial pressure of A? And the partial pressure of B?</p> - <a href="http://ejercicios-fyq.com/en/?-Solutions-" rel="directory">Solutions</a> / <a href="http://ejercicios-fyq.com/en/?+-Solutions,31-+" rel="tag">Solutions</a>, <a href="http://ejercicios-fyq.com/en/?+-Partial-pressure-+" rel="tag">Partial pressure</a>, <a href="http://ejercicios-fyq.com/en/?+-Gases-+" rel="tag">Gases</a> <div class='rss_texte'><p>Mix 3 L (P = 1.2 atm and T = 59 ºF) of a gas A with 1.75 L (P = 0.98 atm and T = 89.6 ºF) of another gas B. What is the total pressure of the mixture if the volume of container is 4 L and the temperature is 77 ºF? What is the partial pressure of A? And the partial pressure of B?</p></div> <div class='rss_ps'><p><img src="http://ejercicios-fyq.com/en/local/cache-TeX/1e6049e706db9c9a68711de230a46d4c.png" style="vertical-align:middle;" width="140" height="40" alt="\bf P_T = 1.35\ atm" title="\bf P_T = 1.35\ atm" /> ; <img src="http://ejercicios-fyq.com/en/local/cache-TeX/f996b6145d1577070517c4c7c5858138.png" style="vertical-align:middle;" width="140" height="38" alt="\bf p_A = 0.93\ atm" title="\bf p_A = 0.93\ atm" /> ; <img src="http://ejercicios-fyq.com/en/local/cache-TeX/20bdb5117ca1860720ed0423c62d058e.png" style="vertical-align:middle;" width="138" height="38" alt="\bf p_B = 0.42\ atm" title="\bf p_B = 0.42\ atm" /></p></div> http://ejercicios-fyq.com/en/?Solutions-of-gases-Partial http://ejercicios-fyq.com/en/?Solutions-of-gases-Partial 2011-05-10T16:04:25Z text/html en fyq Solutions Partial pressure Gases <p>What is the partial pressure of oxygen in a mixture of 25 g of hydrogen and 7 g of oxygen if its volumen is 10 L and the temperature is 20ºC?</p> - <a href="http://ejercicios-fyq.com/en/?-Solutions-" rel="directory">Solutions</a> / <a href="http://ejercicios-fyq.com/en/?+-Solutions,31-+" rel="tag">Solutions</a>, <a href="http://ejercicios-fyq.com/en/?+-Partial-pressure-+" rel="tag">Partial pressure</a>, <a href="http://ejercicios-fyq.com/en/?+-Gases-+" rel="tag">Gases</a> <div class='rss_texte'><p>What is the partial pressure of oxygen in a mixture of 25 g of hydrogen and 7 g of oxygen if its volumen is 10 L and the temperature is 20ºC?</p></div> <div class='rss_ps'><p><img src="http://ejercicios-fyq.com/en/local/cache-TeX/4441fe876095855631513688f3e8dae5.png" style="vertical-align:middle;" width="147" height="38" alt="\bf p_{O_2} = 1.87\ atm" title="\bf p_{O_2} = 1.87\ atm" /></p></div> http://ejercicios-fyq.com/en/?Dynamics-Impulse-and-momentum-0002 http://ejercicios-fyq.com/en/?Dynamics-Impulse-and-momentum-0002 2011-05-09T17:08:02Z text/html en fyq Acceleration Dynamics Momentum Impulse <p>A body of 18 kg is moving at 32 m/s when receives a force of 12.5 N, in the same direction and sense of its movement. The final speed of the body is 50 m/s. Which had been the acceleration? How long the body received the force?</p> - <a href="http://ejercicios-fyq.com/en/?-Dynamics,4-" rel="directory">Dynamics</a> / <a href="http://ejercicios-fyq.com/en/?+-Acceleration,18-+" rel="tag">Acceleration</a>, <a href="http://ejercicios-fyq.com/en/?+-Dynamics,21-+" rel="tag">Dynamics</a>, <a href="http://ejercicios-fyq.com/en/?+-Momentum-+" rel="tag">Momentum</a>, <a href="http://ejercicios-fyq.com/en/?+-Impulse-+" rel="tag">Impulse</a> <div class='rss_texte'><p>A body of 18 kg is moving at 32 m/s when receives a force of 12.5 N, in the same direction and sense of its movement. The final speed of the body is 50 m/s. Which had been the acceleration? How long the body received the force?</p></div> <div class='rss_ps'><p><img src="http://ejercicios-fyq.com/en/local/cache-TeX/266391e8d823d24b4385ad4729cc5bff.png" style="vertical-align:middle;" width="95" height="57" alt="\bf a = 0.7\ \frac{m}{s^2}" title="\bf a = 0.7\ \frac{m}{s^2}" /> ; <img src="http://ejercicios-fyq.com/en/local/cache-TeX/f833aeb5ec738d63ed6564b30f61253f.png" style="vertical-align:middle;" width="112" height="40" alt="\bf \Delta t = 25.9\ s" title="\bf \Delta t = 25.9\ s" /></p></div> http://ejercicios-fyq.com/en/?Dynamics-Hooke-s-Law-0001 http://ejercicios-fyq.com/en/?Dynamics-Hooke-s-Law-0001 2011-05-09T16:57:59Z text/html en fyq Force Dynamics Hooke's Law <p>Below is shown a data table obtained in the laboratory by measuring the deformation of a spring due the weight of different objects: a) What is the spring constant? b) What force is necessary to make a deformation of 15 cm in the spring? c) What will be the length if we use a weight of 2.3 N?</p> - <a href="http://ejercicios-fyq.com/en/?-Dynamics,4-" rel="directory">Dynamics</a> / <a href="http://ejercicios-fyq.com/en/?+-Force-+" rel="tag">Force</a>, <a href="http://ejercicios-fyq.com/en/?+-Dynamics,21-+" rel="tag">Dynamics</a>, <a href="http://ejercicios-fyq.com/en/?+-Hooke-s-Law-+" rel="tag">Hooke's Law</a> <div class='rss_texte'><p>Below is shown a data table obtained in the laboratory by measuring the deformation of a spring due the weight of different objects:</p> <p> <p class="spip" style="text-align: center;"><img src="http://ejercicios-fyq.com/en/local/cache-vignettes/L223xH147/c2024f9cb54d048a3eca6b1dbc478268-7b401.png" style='height:147px;width:223px;vertical-align:middle;' width='223' height='147' alt="\begin {tabular}{|c|c|} \hline Force (N)&Lenght (m)\\ \hline 0&0.2\\ \hline 0.5&0.3\\ \hline 1&0.4\\ \hline 1.5&0.5\\ \hline \end {tabular}" title="\begin {tabular}{|c|c|} \hline Force (N)&Lenght (m)\\ \hline 0&0.2\\ \hline 0.5&0.3\\ \hline 1&0.4\\ \hline 1.5&0.5\\ \hline \end {tabular}" /></p> </p> <p>a) What is the spring constant?</p> <p>b) What force is necessary to make a deformation of 15 cm in the spring?</p> <p>c) What will be the length if we use a weight of 2.3 N?</p></div> <div class='rss_ps'><p>a) <img src="http://ejercicios-fyq.com/en/local/cache-TeX/51be2b4be4e1de51b61f6b876d0417c7.png" style="vertical-align:middle;" width="80" height="67" alt="\bf k = 5\ \frac{N}{m}" title="\bf k = 5\ \frac{N}{m}" /></p> <p>b) <b>F = 0.75 N</b></p> <p>c) <b> L = 0.26 m</b></p></div> http://ejercicios-fyq.com/en/?Dynamics-Force-and-mass-0002 http://ejercicios-fyq.com/en/?Dynamics-Force-and-mass-0002 2011-05-09T16:30:51Z text/html en fyq Acceleration Force Dynamics <p>Determine the acceleration that suffers a body of 20 kg when a constant force of 185 N is applied on it.</p> - <a href="http://ejercicios-fyq.com/en/?-Dynamics,4-" rel="directory">Dynamics</a> / <a href="http://ejercicios-fyq.com/en/?+-Acceleration,18-+" rel="tag">Acceleration</a>, <a href="http://ejercicios-fyq.com/en/?+-Force-+" rel="tag">Force</a>, <a href="http://ejercicios-fyq.com/en/?+-Dynamics,21-+" rel="tag">Dynamics</a> <div class='rss_texte'><p>Determine the acceleration that suffers a body of 20 kg when a constant force of 185 N is applied on it.</p></div> <div class='rss_ps'><p><img src="http://ejercicios-fyq.com/en/local/cache-TeX/6eae952964cd47a0a3ec655e4d41ea0b.png" style="vertical-align:middle;" width="107" height="57" alt="\bf a = 9.25\ \frac{m}{s^2}" title="\bf a = 9.25\ \frac{m}{s^2}" /></p></div> http://ejercicios-fyq.com/en/?Dynamics-inclined-plane-0002 http://ejercicios-fyq.com/en/?Dynamics-inclined-plane-0002 2011-05-09T16:24:11Z text/html en fyq Acceleration Newton's Laws Friction force Incline <p>Calculate the acceleration of the system below if the mass of the body 2 is double than the mass of body 1 and the coefficient of kinetic friction are = 0.12 and = 0.15. Consider = 30º and = 40º.</p> - <a href="http://ejercicios-fyq.com/en/?-Dynamics,4-" rel="directory">Dynamics</a> / <a href="http://ejercicios-fyq.com/en/?+-Acceleration,18-+" rel="tag">Acceleration</a>, <a href="http://ejercicios-fyq.com/en/?+-Newton-s-Laws-+" rel="tag">Newton's Laws</a>, <a href="http://ejercicios-fyq.com/en/?+-Friction-force-+" rel="tag">Friction force</a>, <a href="http://ejercicios-fyq.com/en/?+-Incline-+" rel="tag">Incline</a> <div class='rss_texte'><p>Calculate the acceleration of the system below if the mass of the body 2 is double than the mass of body 1 and the coefficient of kinetic friction are <img src="http://ejercicios-fyq.com/en/local/cache-vignettes/L23xH30/37dc09a2b334eb9f45b15d240ba67472-1dee8.png" style='height:30px;width:23px;vertical-align:middle;' width='23' height='30' alt="\mu_1" title="\mu_1" /> = 0.12 and <img src="http://ejercicios-fyq.com/en/local/cache-vignettes/L23xH30/68bacc49316038b30136c5e43311b70f-affd0.png" style='height:30px;width:23px;vertical-align:middle;' width='23' height='30' alt="\mu_2" title="\mu_2" /> = 0.15. Consider <img src="http://ejercicios-fyq.com/en/local/cache-vignettes/L18xH30/7b7f9dbfea05c83784f8b85149852f08-0bef3.png" style='height:30px;width:18px;vertical-align:middle;' width='18' height='30' alt="\alpha" title="\alpha" /> = 30º and <img src="http://ejercicios-fyq.com/en/local/cache-vignettes/L18xH40/b0603860fcffe94e5b8eec59ed813421-1166c.png" style='height:40px;width:18px;vertical-align:middle;' width='18' height='40' alt="\beta" title="\beta" /> = 40º.</p> <p><span class='spip_document_3 spip_documents spip_documents_center'> <img src='http://ejercicios-fyq.com/en/local/cache-vignettes/L500xH275/dinam_2-14996.png' width='500' height='275' alt="" style='height:275px;width:500px;' /></span></p></div> <div class='rss_ps'><p><img src="http://ejercicios-fyq.com/en/local/cache-TeX/149f558888e8a90996d04849d8e419f7.png" style="vertical-align:middle;" width="107" height="57" alt="\bf a = 0.35\ \frac{m}{s^2}" title="\bf a = 0.35\ \frac{m}{s^2}" /></p></div>