Zinc is present in the human body at a concentration of 33 ppm. If an average...
Zinc is present in the human body at a concentration of 33 ppm. If an average human body has a mass of 70.0 kg, what mass (in grams) of zinc is present? Give your answer to two significant figures.
Answer in g Zn
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Zinc is present in the human body at a concentration of 33 ppm.
If an average...
t is speculated that arsenic (yes, arsenic!) may be an ultra-trace element in the human body,...
t is speculated that arsenic (yes, arsenic!) may be an ultra-trace element in the human body, meaning we need it to survive. Nutritionists estimate that a 75.0-kg person may have as much as 12 micrograms of As in their body. What is the concentration of As in ppb? Give your answer to two significant figures. Answer in (ppb As)
MODEL 7-Conversion Factors from Other Concentration Units Conversion Factors Statement The average concentration of bromide ions...
MODEL 7-Conversion Factors from Other Concentration Units Conversion Factors Statement The average concentration of bromide ions in sea water is 67.3 10° g sea water 67.3 g Br 67.3 g Br 10° g sea water ppm 3.6 g K 1000 g banana 1000 g banana The average banana contains 3.6 ppt potassium 3.6 g K 10° gair 4.7 g H,S 10 g air The average human can detect H,S is air by smell at 4.7 ppb 4.7 g H,S Q42...
Question 16 O pts Calculate the concentration of a solution in ppm of a solution that...
Question 16 O pts Calculate the concentration of a solution in ppm of a solution that has a mass fraction of 0.025. Report your answer to two significant figures.
For a human body falling though air in a spread-eagle position, the numerical value of the...
For a human body falling though air in a spread-eagle position, the numerical value of the constant D is about D = 0.250 kg/m Part A What value of D is required to make ut = 43.0 m/s the terminal velocity of a skydiver of mass 76.0 kg Express your answer using two significant figures. EVO AEO ? kg/m Submit Request Answer Part B If the sky diver's daughter, whose mass is 46.0 kg, is falling through the air and...
A person having a bad fever takes a cold bath. Human body has heat capacity of...
A person having a bad fever takes a cold bath. Human body has heat capacity of 3575 J/(kg K) at normal conditions, and during fever the temperature rises to 38.5oC. What is the final temperature of the sick person if the bath is filled with 263L of water at 39C. Assume that the average mass of a human is 90 kg. Provide answer in degrees Celcius, round off to 2 significant figures
The concentration of chlorine in pool water is 1.50 ppm. What mass of chlorine is present...
The concentration of chlorine in pool water is 1.50 ppm. What mass of chlorine is present in 3.78x108 g of water (which is equivalent to 100,000 gallons of water)? Answer in "g Chlorine"
Prelaboratory Assignment 1. A solution is labeled 512 ppm. The solution is made with a solute...
Prelaboratory Assignment 1. A solution is labeled 512 ppm. The solution is made with a solute that has molar mass equal to 338 g/mol. What is the molarity of the solution? 2. Using the graph on the previous page, answer the following two questions: Label your answer and give the correct number of significant figures. Write your answers in complete sentences, like you are reporting your results to a journal or at a scientific conference. What is the concentration (in...
What is the concentration of bromide, in ppm, if 169.32 g MgBr2 is dissolved in 1.47...
What is the concentration of bromide, in ppm, if 169.32 g MgBr2 is dissolved in 1.47 L water. Record your answer in scientific notation to 3 significant figures.
A) Calculate the molality of a sucrose solution made by dissolving 73.1 grams sucrose into 55.3...
A) Calculate the molality of a sucrose solution made by dissolving 73.1 grams sucrose into 55.3 grams water. The molar mass of sucrose is 342.2 g/mol. Record your answer in scientific notation using 3 significant figures. Use * for the multiplication symbol. B) A sodium hydroxide solution that contains 55.5 grams of NaOH per L of solution has a density of 1.14 g/mL. Calculate the molality of the NaOH in this solution. Record your answer to 2 decimal spaces. C)...
Suppose you find the concentration in your home is 57 ppm by volume at 1.00 atm...
Suppose you find the concentration in your home is 57 ppm by volume at 1.00 atm pressure and 25 °C. What is the concentration in mg/L and in ppm by mass. (The average molar mass for dry air is 28.96 g/mol at 1.00 atm pressure and 25 °C.) what is Concentration = mg /L what is Concentration = ppm
MODEL 7-Conversion Factors from Other Concentration Units Conversion Factors Statement The average concentration of bromide ions in sea water is 67.3 10° g sea water 67.3 g Br 67.3 g Br 10° g sea water ppm 3.6 g K 1000 g banana 1000 g banana The average banana contains 3.6 ppt potassium 3.6 g K 10° gair 4.7 g H,S 10 g air The average human can detect H,S is air by smell at 4.7 ppb 4.7 g H,S Q42...
Question 16 O pts Calculate the concentration of a solution in ppm of a solution that has a mass fraction of 0.025. Report your answer to two significant figures.
For a human body falling though air in a spread-eagle position, the numerical value of the constant D is about D = 0.250 kg/m Part A What value of D is required to make ut = 43.0 m/s the terminal velocity of a skydiver of mass 76.0 kg Express your answer using two significant figures. EVO AEO ? kg/m Submit Request Answer Part B If the sky diver's daughter, whose mass is 46.0 kg, is falling through the air and...
Prelaboratory Assignment 1. A solution is labeled 512 ppm. The solution is made with a solute that has molar mass equal to 338 g/mol. What is the molarity of the solution? 2. Using the graph on the previous page, answer the following two questions: Label your answer and give the correct number of significant figures. Write your answers in complete sentences, like you are reporting your results to a journal or at a scientific conference. What is the concentration (in...
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