All categories

3 years ago

calculate the average atomic mass for neon if its abundance in nature is 90.5% neon-20, 0.3% neon-21, and 9.2% neon-22

1 answer:

4 0

The average atomic mass of Neon would simply be the sum of the weighted average of each isotope. That is:

average atomic mass = 0.905 * 20 + 0.003 * 21 + 0.092 * 22

average atomic mass = 20.187 amu

You might be interested in

Which is true about a chemical reaction

victus00 [196]

I think A. is the answer

8 0

3 years ago

Read 2 more answers

Is the water of hydration covalently bound to the compound?

WINSTONCH [101]

The water of hydration is not covalently bound to the compound.

Many compounds, especially ionic compounds contain molecules of water of hydration which appears as part of the chemical formula of the compound.

This water of hydration is only attached to the crystal of the compound loosely. There is no chemical interaction between the water molecules and the crystal of the compound.

To prove this, the water of hydration is easily driven off by heating. It wouldn't have been possible to drive it off by heating if was covalently bonded to the compound.

Therefore, the water of hydration is not covalently bound to the compound.

Learn more: brainly.com/question/919417

3 0

3 years ago

Explain why most volcanoes and earthquakes occur along boundaries between tectonic plates.

rodikova [14]

Most volcanoes and earthquakes occur along boundaries between tectonic plates because tectonic plates shift either spreading apart causing a earthquake or moving together which pushes the plate upwards causing a volcanoe

3 0

3 years ago

A pure substance melts at 88 degrees celsius and does not conduct electricity in either the solid state or the liquid state. it

scoundrel [369]

Answer:

The answer to your question is: Covalent compounds.

Explanation:

In chemistry there are two kinds of compounds:

Ionic compounds are composed by a metal and a nonmetal, and some are

good conductors of electricity in solid state or when they

dissolve in water.

Covalent compounds are composed by to nonmetals, their melting point is

lower compare to ionic compounds and are not

conductors of electricity in solid state or when are

dissolve in water.

4 0

3 years ago

A pump contains 1.5 L of air at 175 kPa. You draw back on the piston of the pump, expanding the volume until the pressure reads

Tresset [83]

Answer:

$\large \boxed{\text{86.8 L}}$

Explanation:

The temperature and amount of gas are constant, so we can use Boyle’s Law.

$p_{1}V_{1} = p_{2}V_{2}$

Data:

$\begin{array}{rclrcl}p_{1}& =& \text{0.579 atm}\qquad & V_{1} &= & \text{150 L} \\p_{2}& =& \text{1.00 atm}\qquad & V_{2} &= & ?\\\end{array}$

Calculations:

$\begin{array}{rcl}0.579 \times 150 & =& 1.00V_{2}\\86.85 & = & 1.00V_{2}\\V_{2} & = &\dfrac{86.85}{1.00}\\\\& = &\textbf{86.8}\\\end{array}\\\text{The new volume of the gas is } \large \boxed{\textbf{86.8 L}}$

6 0

4 years ago