Bthe atomic number of nitrogen is 7. what is the mass number of a nitrogen atom with 6 neutrons? express your answer as an integer.

Mass number is equal to the sum of number of neutrons (neutral subatomic particle) and number of protons (positively charge particle).

Mass number  =

Now, atomic number is same as the number of protons i.e. atomic of nitrogen is 7 . Thus, number of protons is also equal to 7.

Therefore,

Mass number  =

=

Hence, mass number of nitrogen is equal to .

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boiling point is the temperature at which the vapor pressure of the liquid equals atmospheric pressure. the vapor pressure of solvent molecules is decreased when a solute is added, so a higher temperature is required to increase the number of solvent molecules in the gas phase above the liquid.

at the freezing point, the vapor pressures of the solid and liquid are equal; a lower temperature is needed to reduce the number of solvent particles above the liquid.

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tobey

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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