Match each vocabulary word with its definition. match the items in the left column to the items in the right column. 1. one mole of any gas at stp will occupy 22.4 l atomic mass 2. the sum of the protons and neutrons in an atom mole 3. 6.02 x 1023; the number of atoms, molecules, or particles in a mole mass number 4. atoms of the same element that have different numbers of neutrons avogadro's hypothesis 5. the relative mass of an atom as compared to the carbon-12 atom isotopes 6. the amount of a substance that contains the same number of atoms, molecules, or particles as 12 g of carbon-12 avogadro's number 7. the mass of an element or molecule in grams per mole (g/mol) molar mass

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1. one mole of any gas at stp will occupy 22.4 l : avogadro's hypothesis

2.  the sum of the protons and neutrons in an atom: Mass number

3. 6.02 x 1023; the number of atoms, molecules, or particles in a mole : avogadro's number

4. atoms of the same element that have different numbers of neutrons : isotopes

5. the relative mass of an atom as compared to the carbon-12 atom: molar mass

6. the amount of a substance that contains the same number of atoms, molecules, or particles as 12 g of carbon-12: mole

7. the mass of an element or molecule in grams per mole (g/mol): atomic mass

Explanation:-

According to avogadro's law, 1 mole of every substance occupies 22.4 Liters at STP and contains avogadro's number of particles.

Avogadro's number of substance represents 1 mole and thus weigh same as molecular mass called as molar mass. Molar mass is expressed in g/mol.

Protons are nucleus are located in the center of an atom where while mass of an atom is concentrated.

Mass number = Number of protons + Number of neutrons

Mass number is a whole number.

Isotopes are the atoms of same element with same atomic number but different mass number. Thus they have same protons but different number of neutrons.

Atomic mass is calculated by:. It is a integer.

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.