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xz_007 [3.2K]
3 years ago
7

What do the formulas for table salt, NaCl, and water, H2O indicate about the compounds?

Chemistry
1 answer:
neonofarm [45]3 years ago
4 0
The formulas indicate the number of elements in each compound. Notice the difference in ratios: 
NaCl is 1:1, while H2O is 2:1.
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The internal energy of 10 moles of helium (a monatomic gas) is 15 kJ. What is the rms speed of the molecules? (The molar mass of
Radda [10]

Answer:

v_{rms}=866.32m/s

Explanation:

Hello,

In this case, since the rms speed of the molecules is computed by:

v_{rms}=\sqrt{\frac{3RT}{M} }

Whereas the absolute temperature is computed from the internal energy (by using the Cp of helium (3.1156 J/g*K) as shown below:

U=nCvT\\\\T=\frac{U}{nCv}=\frac{15kJ*\frac{1000J}{1kJ} }{10mol*\frac{4.00g}{1mol} *3.1156\frac{J}{g*K} }  \\\\T=120.36K

Thereby, the rms speed results:

v_{rms}=\sqrt{\frac{3*8.314\frac{kg*m^2}{s^2*mol*K}*120.36K}{4.00\frac{g}{mol}*\frac{1kg}{1000} } } \\\\v_{rms}=866.32m/s

Regards.

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Are air masses and fronts the same thing?
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Best answer and explanation will get marked brainiest
Darina [25.2K]

The number 345,000 has 3 significant figures because the trailing zeros are not significant since there's no decimal point.

<h3>What is significant figures?</h3>

Significant figures of a number in positional notation are digits in the number that are reliable and necessary to indicate the quantity of something.

Also significant figures can be defined as, the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value.

Examples of significant figures;

  • 405 = 3 significant figures
  • 405000 = 3 significant
  • 0.040500 = 5 significant figures

<u>Note:</u> leading zeros are not significant but trailing zeros, which are zeros at the end of a number, are significant only if the number has a decimal point.

345,000 = 3.45 x 10⁵ (3 significant figures)

Thus, the number 345,000 has 3 significant figures because the trailing zeros are not significant since there's no decimal point.

Learn more about significant figures here: brainly.com/question/24491627

#SPJ1

4 0
2 years ago
Where are the products in a chemical equation located
ANEK [815]

Answer:

the right side of the arrow.

Explanation:

reactants are on left because they are the ones reacting. products are on the right because they are the final products.

3 0
3 years ago
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