El aire exhalado contiene 74,5g de N2, 15,7g de O2, 3,6g de CO2 y 6,2g de H2O. En un espacio de 2.1 L y 37°C a. Calcule la fracción molar de cada gas

b. Calcule la presión parcial de cada gas

c. Calcule la presión total del sistema.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

the right answer is c i just did the question.

answer carbon and three oxygen atoms;