Chapter 1, Problem 1.88AE

The radius of an atom of gold (Au) is about 1.35 Å. Part A: Express this distance in nanometers (nm). Express your answer using three significant figures.   Part B: Express this distance in picometers (pm). Express your answer using three significant figures.   Part C:  How many gold atoms would have to be lined up to span 9.5 mm? Express your answer using two significant figures.   Part D: If the atom is assumed to be a sphere, what is the volume in cm3 of a single Au atom? Express your answer using three significant figures.

A researcher would like to determine whether there is any relationship between students’ grades and where they choose to sit in the classroom. Specifically, the researcher suspects that the better students choose to sit in the front of the room. To test this hypothesis, the researcher asks her colleagues to help identify a sample of n = 100 students who all sit in the front row in at least one class. At the end of the semester, the grades are obtained for these students and the average grade point average is M = 3.25. For the same semester, the average grade point average for the entire college is μ = 2.95 with σ = 1.10. Use a two-tailed test with α = .01 to determine whether students who sit in the front of the classroom have significantly different grade point averages than other students.NOTICE that you are asked to use α = .01! A) sig., p<.01 B) N.S. ("not significant"), p>.01 C) sig., p>.01 D) N.S., p<.01

To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.900 ppm fluoride, F−. How many grams of F− must be added to a cylindrical water reservoir having a diameter of 4.12×10^2 m and a depth of 76.72 m?

In 2014 (the last year for which I can find data), Utah County had a carbon monoxide (CO) average concentration of 1.90 ppm. (1 ppm stands for 1 part per million which means in one million volumes of air—choose whatever volume unit you like—there would be one volume of carbon monoxide.) An average human takes inhales 0.50 L per breath and takes 20 breaths per minute. Carbon monoxide in the atmosphere has a density of 1.2 grams per liter. 3. How many milligrams of carbon monoxide would a person in Utah County inhale in an 8 hours?

In 2014 (the last year for which I can find data), Utah County had a carbon monoxide (CO) average concentration of 1.90 ppm. (1 ppm stands for 1 part per million which means in one million volumes of air—choose whatever volume unit you like—there would be one volume of carbon monoxide.) An average human takes inhales 0.50 L per breath and takes 20 breaths per minute. Carbon monoxide in the atmosphere has a density of 1.2 grams per liter. 2. How many liters of carbon monoxide will a person breathe in Utah County in 8 hours?

In 2014 (the last year for which I can find data), Utah County had a carbon monoxide (CO) average concentration of 1.90 ppm. (1 ppm stands for 1 part per million which means in one million volumes of air—choose whatever volume unit you like—there would be one volume of carbon monoxide.) An average human takes inhales 0.50 L per breath and takes 20 breaths per minute. Carbon monoxide in the atmosphere has a density of 1.2 grams per liter. How many liters of air does a person breathe in Utah County in 8 hours? How many liters of carbon monoxide will a person breathe in Utah County in 8 hours? How many milligrams of carbon monoxide would a person in Utah County inhale in an 8 hours?

Calculate the Normality of Hcl of a solution that contains 45 g in 325 ml of water, knowing that the Molecular Mass of the Acid is 36.4 g / mol. Density is 1.19 g / ml and its purity is 27%.                 Science

The level of mercury in fish is 0.040μg/mL (w/v), that is equivalent to   Group of answer choices 0.040 ppm 4.0 ppb 0.040 mg/mL 4.0 mg/L

K   = 0.2246 meq/100g, Mg = 5.3 meq/100g, Ca = 10.4538 meq/100g weight of 1 Ha = 7.761 x 10^6 Kg how do i get these values in meq/100g to kg/ha. please show step by step