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3 years ago

Which group of atoms has this electron dot structure? noble gases non-metals metals network solids alkaline liquids

1 answer:

3 0

The Answer is Noble gases.
It's consequential to note that helium has only two electrons so it does not have the equal electron dot structure as the other noble gases. Electron dot structure displays the number of valence electrons (electrons in the highest energy level) for an atom.

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What is the mass in grams of 6.12 x 10^20 molecules of caffeine, C8H10N4O2?

baherus [9]

$6,02*10^{23} \ \ \ \ \ \ \rightarrow \ \ \ \ \ 194,2g\\
6,12 * 10^{20} \ \ \ \ \ \ \rightarrow \ \ \ \ \ x\\\\
x=\frac{6,12*10^{20}*194,2g}{6,02*10^{23}}\approx197*10^{-3}g=0,197g$

6 0

3 years ago

Sodium chloride is an example of a

Andrei [34K]

C. Weak acid is the correct answer

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3 years ago

Read 2 more answers

What is the new pressure if the temperature outside is 296k and his weight causes the tire's volume to drop to 2.0 liters

sukhopar [10]

Question:

At standard temperature and pressure, the volume of a tire is 3.5L. What is the new pressure if the temperature outside is 296k and its weight causes the volume of the gas is 2.0 L?

Answer:

The new pressure is: 1.896 atm

Explanation:

At standard temperature and pressure, we have:

$P_1 = 1atm$

$T_1 = 273.15k$

$V_1 = 3.5L$

Outside, we have:

$T_2 = 296k$

$V_2 = 2.0L$

Required

Determine the new pressure

Using combined gas law, we have:

$\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}$

This gives:

$\frac{1 * 3.5}{273.15} =\frac{P_2*2.0}{296}$

Solve for $P_2$

$P_2 = \frac{296 * 1 * 3.5}{273.15*2.0}$

$P_2 = \frac{1036}{546.30}$

$P_2 \approx 1.896 atm$

7 0

3 years ago

Why are the three atoms are isotopes of magnesium

LenKa [72]

Answer:

Magnesium is a naturally ubiquitous; (appearing & found evrywhere) element and has three naturally occurring stable isotopes, 24Mg, 25Mg and 26Mg, with relative abundance of 78.99%, 10.00% and 11.01%, respectively.

However, they differ only because a 24Mg atom has 12 neutrons in its nucleus, a 25Mg atom has 13 neutrons, and a 26Mg has 14 neutrons.

Explanation:

6 0

2 years ago

Question 1 (2 points)

bogdanovich [222]

Answer:

3.75 L

Explanation:

We can solve this problem by using Charles' law, which states:

V₁T₂=V₂T₁

Where subscript 1 stands for initial volume and temperature and subscript 2 for final volume and temperature, meaning that in this case:

V₁ = 2.5 L

T₂ = 300 K

V₂ = ?

T₁ = 200 K

We input the data:

2.5 L * 300 K = V₂ * 200 K

And solve for V₂:

V₂ = 3.75 L

5 0

3 years ago