From the conversion of units:
1 cm^3 is equivalent to 1 mL
1 L is equivalent to 1000 mL
therefore,
to convert from liter to cm^3, we simply multiply by 1000.
Note that the multiplication will be done in the denominator.
Based on this:
density = (0.625 g/l) x (1g/1000 cm^3) = <span> 0.000625 g/cm^3
= 6.25 x 10^-4 g/cm^3</span>
Answer:
A calorimeter is an apparatus for measuring the amount of heat involved in a chemical reaction or other process.
Answer:
the name of reaction that produces esters is dehydration.
Answer:
697 g / mol
Explanation:
The osmotic pressure of a protein ( non electrolyte ) is given by:
π V= nRT where V is the volume, n is the number of moles, R is the gas constant ( 0.08206 L·atm/Kmol ), and T is the temperature (K).
n= mass/ MW protein ⇒ MW protein = mass / n
Thus,
π V = ( mass/ MW ) RT
MW = mass x R xT/ ( π V )
mass = 0.873 g
R = 0.08206 L·atm/K·mol
T = ( 15.6 + 273 ) K= 288.6 K
π = 0.061 atm
V = 48.6 mL = 48.6 mL x ( 1 L/ 1000 mL ) = 0.0486 L
We just need to plug our values into the aqbove equation for MW:
MW = 0.873 g x 0.08205 L· atm /K·mol x 288.6 K / ( 0.061 atm x0.0486 L )
= 697 g/mol
Answer:
C. The rate of cellular respiration in the tank was much higher than
the rate of photosynthesis
Explanation:
In nature, cellular respiration and photosynthesis are opposite metabolic reactions. Cellular respiration, which is the process of releasing energy, requires oxygen while photosynthesis, which is the process of manufacturing foods by green plants, releases oxygen into the atmosphere. The two equations are as follows:
Photosynthesis:
6CO2 + 6H2O → C6H1206 + 6O2 (oxygen released)
Respiration:
C6H1206 + 6O2 (oxygen used) → 6CO2 + 6H2O
According to this question, 10 snails and two small aquatic plants were added to a closed glass tank half full with water. It was observed that all the snails died. This is most likely due to the fact that the rate of cellular respiration in the tank was much higher than the rate of photosynthesis.
In other words, the usage of oxygen via cellular respiration was much higher than the release of oxygen via photosynthesis.
