Density can be calculated using the following rule:
density = mass / volume
therefore,
mass = density x volume
From the givens:
we have the density = 1030 kg/m^3 and volume = 1.89 m^3
Substitute in the equation to get the mass as follows:
mass = 1030 x 1.89 = 1.9467 x 10^3 kg
We assume that the method that made use of urea was able to recover all of the recoverable substance. The method in question is the method that makes use of water.
The total amount of substance is 43 mg/dl. The recovered amount is 25 mg/dl. The percent recovery is
(25 mg/dl / 43 mg/dl) * 100 = 58.14%
I believe the answer is option D !!
Various samples of the must be combusted in other to obtain a reliable result.
<h3>What is a bomb calorimeter?</h3>
The bomb calorimeter is used to obtain the energy of a sample. This is called the energy equivalent or the energy value of the sample.
Now, we know that the bomb calorimeter is calibrated by the use of benzoic acid hence it must be combusted first to obtain the basic energy value of the calorimeter.
Various samples of the must be combusted in other to obtain a reliable result.
Learn more about bomb calorimeter:brainly.com/question/24245395?
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Becquerel discovered radioactivity by accident while studying a mineral containing uranium. He observed that with exposure to sunlight the mineral gave off a penetrating energy that exposed the film. While one day he tried the experiment one day the day was cloudy so he put it away in a dark dresser drawer and at the next day he found the picture of the mineral and later found out that the mineral did not need sunlight to expose radiation so he gave it to two young researchers that eventually isolated the two elements named polonium and radium. <span />
