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3 years ago

The _____ is one of the way paces where North America and Pacific Plates meet.

Chemistry

2 answers:

Morgarella [4.7K]3 years ago

8 0

Answer:

The ring of fire

Explanation:

The ring of fire is where they meet or at the fault lines

svetoff [14.1K]3 years ago

7 0

Ring of fire is correct

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Calculate the solubility (in g/L) of CaSO 4 ( s ) CaSO4(s) in 0.400 M Na 2 SO 4 ( aq ) at 25 ° C 0.400 M Na2SO4(aq) at 25°C. The

Allushta [10]

Explanation:

Ionization equation for $CaSO_{4}$ is as follows.

$CaSO_{4} \rightarrow Ca^{2+} + SO^{2-}_{4}$

s s s

Now, the expression for the solubility product is as follows.

$K_{sp} = [Ca^{2+}][SO^{2-}_{4}]$

= $s \times s$

= $s^{2}$

As the concentration of $Na_{2}SO_{4}$ is given as 0.4 M.

So, $[Na_{2}SO_{4}] = [SO^{2-}_{4}]$ = 0.4 M

Putting the given values as follows.

$K_{sp} = [Ca^{2+}][SO^{2-}_{4}]$

$4.93 \times 10^{-5} = [Ca^{2+}] \times 0.4$

$[Ca^{2+}]$ = 12.325 \times 10^{-5}[/tex]

Hence, the solubility of $CaSO_{4}$ in $Na_{2}SO_{4}$ is $12.325 \times 10^{-5}$ .

Therefore, solubility of $CaSO_{4}$ in g/ml as follows.

$12.325 \times 10^{-5} \times 136 g/mol$

= 0.0167 g/L

Thus, we can conclude that solubility of $CaSO_{4}$ is 0.0167 g/L.

4 0

3 years ago

The rapid decomposition of sodium azide, NaN3, to its elements is one of the reactions used to inflate airbags: 2 NaN3 (s)  2 N

masha68 [24]

Answer: The amount of nitrogen gas produced is 3.864 grams

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

Given mass of $NaN_3$ = 6.00 g

Molar mass of $NaN_3$ = 65 g/mol

Putting values in equation 1, we get:

$\text{Moles of }NaN_3=\frac{6.00g}{65g/mol}=0.092mol$

For the given chemical reaction:

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

By Stoichiometry of the reaction:

2 moles of $NaN_3$ produces 3 moles of nitrogen gas

So, 0.092 moles of $NaN_3$ will produce = $\frac{3}{2}\times 0.092=0.138mol$ of nitrogen gas

Now, calculating the mass of nitrogen gas by using equation 1, we get:

Molar mass of nitrogen gas = 28 g/mol

Moles of nitrogen gas = 0.138 moles

Putting values in equation 1, we get:

$0.138mol=\frac{\text{Mass of nitrogen gas}}{28g/mol}\\\\\text{Mass of nitrogen gas}=(0.138mol\times 28g/mol)=3.864g$

Hence, the amount of nitrogen gas produced is 3.864 grams

7 0

3 years ago

Phosphorus oxychloride has the chemical formula POCl3, with P as the central atom. In order to minimize formal charge, how many

Elina [12.6K]

Answer:

Phosphorus makes 5 bonds with other atoms

Explanation:

$POCl_{3}$ has total 32 number of valence electrons (P has 5 , O has 6 and Cl has 7 valence electrons).

These valence electrons are used to draw Lewis structure of $POCl_{3}$ .

Formal charge on an atom = (no. of valence electrons of the atom)-(no. of covalent bonds attached to the atom)-(no. of electrons in lone pair of the atom)

Applying octet rule (atoms have eight electrons in their valence shell) and minimizing formal charge of $POCl_{3}$ , it has been found that P makes total 5 bonds with rest of the atoms.

Lewis structure of $POCl_{3}$ along with formal charge (in parentheses) has been given below.

6 0

3 years ago

Which of the following processes involves only physical change? A. decay B. sublimation C. digestion D. combustion

grigory [225]

B. Sublimation
Sublimation is the change of a liquid from the liquid state to the gas state. That’s why it’s only involves a physical change. Also, you can go back to the liquid stage.

5 0

3 years ago

Read 2 more answers

Are there any good mnemonic devices for remembering functional groups?

Nikolay [14]

Mnemonics for Functional Groups These are possible mnemonics for the common functional groups.
Vowels: The vowels "A", "E", and "Y" for Alkane, Alkene, and Alkyne.
Remember there is no "I." "O" and "U" would result in awkward pronunciations. Alcohol: Look for the "C-O-H" in "Alcohol." Ether: Ethers were anesthetics used in the 1800s.
Dr. Kellogg also lived at the same time. Corn Flakes are made by Kellogg's. A rooster or wingspan (C-O-C) is the cornflake mascot.
Amine: Remember the "N" stands for nitrogen. Aldehyde: This sounds like "Adelaide," the Australian city.
Australia is at the end of the Asian islands, and aldehydes are at the end of the hydrocarbon chain. The "Y" indicates a C=O double bond.
Ketone: Imagine the diagonal strokes of "K" forming the C=O double bond.
Carboxylic Acid: "Box" stands for boxed wine or C-O-H, alcohol. The "Y" indicates a C=O double bond.
Ester: This sounds like "Estelle" George Costanza's mother in the TV show Seinfeld. George's nickname was Koko or Coco. So think of O=C-O-C.
Amide: Amine with a "D". D for double.

8 0

3 years ago