A weather balloon has a volume of 65 liters when it is launched from sea level. It rises to an altitude where the atmospheric pressure is 0.65 atmospheres. What is its volume?

Solution:

Subsequently, the weather balloon has a diameter of 65 liters at 28.0 and 748 mmHg. We are told to calculate the diameter of the weather balloon, whether the pressure increases to 385 mm Hg and the temperature decreases to –15.0 C.

Remember that the ideal gas law is as follows:

PV = nRT

The density, volume and temperature of the gas are related to the number of moles of the gas and the constant of the fundamental product:

PV / T = nR

The value of the nR is unchanged. In the case of a given gas mole, the original and final pressure, volume and temperature of the gas shall be calculated by the combined gas law:

P1V1 / T1 =  P2V2 / T2

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation: