A 25.0-cm long cylindrical glass tube, sealed at one end, is filled with ethanol. The mass of ethanol needed to fill the tube is found to be 45.23 g. The density of ethanol is 0.789 g/mL. Calculate the inner diameter of the tube in centimeters.

Therefore, internal diameter of the glass tube = 1.708 cm

Explanation:

Volume of ethanol = volume of glass tube

volume of ethanol = mass of ethanol/ density of ethanol

volume of ethanol = 45.23 g/ 0.789g/ml

volume of ethanol = 57.326 ml

Therefore volume of glass tube = 57.326 ml

1 ml = 1 cm³

Volume of glass tube in cm³ = 57.326 cm³

Volume of a cylinder = πd²h/4

where h = height of cylinder; d = internal diameter of cylinder

d = √(volume * 4/πh)

d = √(4 * 57.326 cm³ / 3.142 * 25)

d = 1.708 cm

Therefore, internal diameter of the glass tube = 1.708 cm

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explanation:

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.