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3 years ago

5

Change of a gas to a liquid

2 answers:

erastovalidia [21]3 years ago

7 0

Answer:

vaporization or condensation

Explanation:

google

OLEGan [10]3 years ago

4 0

Equally the same paragraph

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__________ solutions are very unstable.

Serhud [2]

Answer:

none of the above

Explanation:

because all of them are unstable

3 0

3 years ago

Read 2 more answers

Based on the equation below, how many moles of aluminum sulfate (Al2(SO4)3) will be produced from the reaction of 5.8 moles of a

andrey2020 [161]

Answer:
2.9
Explanation:
1- we can see that for every 2 moles of aluminum hydroxide 1 mole of aluminum sulfate is made so we can make a relation

6 0

3 years ago

Give the symbol for the atom that corresponds to each electron configuration:

stepan [7]

Answer:

Na

N

Si

O

K

Ti

Explanation:

To know what symbol corresponds to the electron configurations, we just have to count the number of electrons.

⇒1s² 2s² 2p6 3s1

This means there are 2 electrons on the first shell

8 electrons on the second shell

and 1 electron on the third shell

in total there are 11 electrons ⇒ this means the atom number is 11

If we look at the periodic table to atom number 11 we'll see that this is Sodium (Na).

⇒ 1s² 2s² 2p³

This means there are 2 electrons on the first shell

and 5 electrons on the second shell

So 7 electrons in total ⇒ this means the atom has atom number 7

⇒Nitrogen (N)

⇒ 1s² 2s² 2p6 3s² 3p²

This means there are 2 electrons on the first shell

There are 8 electrons on the second shell

There are 4 electrons on the third shell

So there are 14 electrons in total ⇒ atom number 14

⇒Silicon (Si)

⇒1s² 2s² 2p4

This means there are 2 electrons on the first shell

There are 6 electrons on the second shell

8 electrons in total ⇒ atom number = 8

⇒Oxygen (O)

⇒ 1s² 2s² 2p6 3s² 3p6 4s1

This means there are 2 electrons on the first shell

There are 8 electrons on the second shell

There are 8 electrons on the third shell

There is 1 electron on the fourth shell

This means there are 19 electrons in total ⇒ atom number 19

⇒Potassium (K)

⇒ 1s² 2s² 2p6 3s² 3p6 3d² 4s²

This means that 2 electrons on the first shell

There are 8 electrons on the second shell

There are 10 electrons on the third shell

there are 2 electrons on the fourth shell

There are 22 electrons in total ⇒ atom number 22

⇒ Titanium (Ti)

4 0

3 years ago

1. when energy increases, amplitude _________.

Ghella [55]

Answer:

1. decreases

2. Transverse

3. Vibrations

5 0

3 years ago

Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. Th

Zarrin [17]

Answer: 136 g of $NaN_3$ must be reacted to inflate an air bag to 70.6 L at STP.

Explanation:

Using ideal gas equation:

$PV=nRT$

P= pressure of nitrogen gas = 1 atm (at STP)

V =volume of nitrogen gas = 70.6 L

n = number of moles of nitrogen gas = 1 atm (at STP)

R = gas constant = 0.0821 Latm/Kmol

T = temperature of nitrogen gas = 273 K (at STP)

$1atm\times 70.6L=n\times 0.0821 L atm/K mol\times 273$

$n=3.14$

For the balanced chemical reaction:

$2NaN_3(s)\rightarrow 2Na(s)+3N_2(g)$

3 moles of nitrogen are produced by = 2 moles of $NaN_3$

3.14 moles of nitrogen are produced by = $\frac{2}{3}\times 3.14=2.09$ moles of $NaN_3$

Mass of $NaN_3$ = Moles × Molar mass = 2.09 mole × 65 g/mol = 136 g

7 0

4 years ago