Two jars are placed on a counter with a mcdonald's french fry inside, one has a lid, the other does not. they are left alone to see which one decays faster, after 2 days the fry in the closed jar looks fresher. what is the independent variable? what is the dependent variable? what is the control variable?

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.  

answer: mole of the gas

answer: mole of the gasexplanation:

idk what is it? is this a question that you know the answer or u dont