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MArishka [77]
3 years ago
7

To how many significant figures can you report your measurement of the mass the nacl sample?

Chemistry
1 answer:
aleksklad [387]3 years ago
5 0

<span>Sodium chloride, NaCl, sample are usually used in many laboratory testings and experiments. The mass required for samples are usually just below 10 g. The most accurate readings for this mass is through which there are 2 decimal places. Thus, the highest number of significant  figures that can be reported for such is only 4. </span>

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6 At STP, which element is a good conductor of electricity?(1) chlorine (3) silver
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Chlorine is a halogen existing as a diatomic gas. Iodine too is a halogen and 2 Iodine atoms held together by covalent bond. Cl - Cl bonds and I-I bonds are  covalent bonds. the outer electrons of Cl and I take part in covalent bonds therefore they are fixed and not free to move about. therefore no free electrons to conduct electricity.
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.an open flask contains 0.200 mol of air. atmospheric pressure is 745 mmhg and room temperature is 68˚f. how many moles are pres
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<u>0.219 moles </u><u>moles are present in the flask when the </u><u>pressure </u><u>is 1.10 atm and the temperature is 33˚c.</u>

What is ideal gas constant ?

  • The ideal gas constant is calculated to be 8.314J/K⋅ mol when the pressure is in kPa.
  • The ideal gas law is a single equation which relates the pressure, volume, temperature, and number of moles of an ideal gas.
  • The combined gas law relates pressure, volume, and temperature of a gas.

We simple use this formula-

The basic formula is PV = nRT where. P = Pressure in atmospheres (atm) V = Volume in Liters (L) n =  of moles (mol) R = the Ideal Gas Law Constant.

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V = nRT/P = 0.2 * 0.08206 * 298.15K / (745/760) = 4.992Liters

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Therefore, 0.219 moles moles are present in the flask when the pressure is 1.10 atm and the temperature is 33˚c.

Learn more about ideal gas constant

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