1 Answers
Call
How does the digestive system help with water input and water output in the body?How does the respiratory system help with water input and water output in the body?
I'm not sure what the has to do with water (other than the body it's in, and water vapor). Sorry.
1 Answers 1 views
9. The density of water is 1.0 g/mL. What is the density of water in pounds/gallon?
Use "Dimensional Analysis" to determine what "conversion factors" you will need before you do the math. $g/"mL" xx "??"/"??" = "lbs"/"gal"$ We need a mass conversion unit ($g to "lbs"$)...
1 Answers 1 views
An 81-kg person puts on a life jacket, jumps into water, and floats. The jacket's volume is $3.1*10^-2m^3$ and is completely under water. The volume of the person’s body that is under water is $6.2*10^-2m^3$. What is the density of the life jacket?
The idea here is that you need to find the mass of the life jacket by using the total mass of water displaced by the person and his life jacket....
1 Answers 1 views
An 77-kg person puts on a life jacket, jumps into water, and floats. The jacket's volume is $2.7*10^-2m^3$ and is completely under water. The volume of the person's body that is under water is $6.7*10^-2m^3$. What is the density of the life jacket?
Since the problem provides you with the volume of the jacket, you will have to focus on find its mass by using the total mass of water displaced by the...
1 Answers 1 views
When is the density of water $"1 g/mL"$? How can we measure density?
The of pure water is 1 gram per 1 milliliter or one cubic cm. By knowing the density of water we can use it in dilution equations or to calculate...
1 Answers 1 views
The density of water is 1.00 g/mL. Carbon tetrachloride is insoluble in water. Would carbon tetrachloride float on water or sink beneath water when they are combined?
of carbon tetrachloride at ambient conditions is approximately 1.5 g/ml, so for a given volume carbon tetrachloride has a higher mass than water. So when combined the carbon tetrachloride...
1 Answers 1 views
The density of mercury is 5,427 $kg$$/m^3$. If the density of water is $1.0$ $g$$/mL$, will mercury float or sink in water?
The density, $rho$, of mercury $=$ $13,593*kg*m^-3$; it is $13.6*g*cm^-3$ in more accessible units. Anyway, mercury metal is pretty dense stuff. If you ever found a pool of mercury, you...
1 Answers 1 views
A graduated cylinder contains 225 mL of water. What is the new water level affer 30.2 g of silver metal with a density of 10.5 g/mL is submerged in the water?
Well, we work out the water displaced by the silver........by calculating the volume of the silver nugget using the . $"Density"(rho)$ $=$ $"Mass"/"Volume"$ Thus $"Volume"="Mass"/rho$ $=$ $(30.2*g)/(10.5*g*mL^-1)$ $~=$ $3*mL$. This...
1 Answers 1 views
As liquid water freezes, the molecules arrange themselves in a way that takes up more space than llquid water. What would most likely occur if the arrangement of frozen water molecules required less space than that of liquid water molecules?
If ice were denser than liquid water, icebergs would likely sink (even given that sea water is denser than normal water). If this were the case then oceans would likely...
1 Answers 1 views
The density of water is 1.00 g/mL at 4°C. How many water molecules are present in 2.46 mL of water at this temperature?
The idea here is that you need to use the of water at $4^@"C"$ and the volume of the sample to find its mass, then use water's molar mass to...
1 Answers 1 views