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eduard
3 years ago
10

Compared to the process of extracting lithium from mineral deposits, the process of extracting lithium from evaporation ponds re

quires ______ water, ______ money, and ___________ time.
Options: more, less, the same amount of
Chemistry
2 answers:
Shtirlitz [24]3 years ago
7 0

Answer:

Explanation:

Compared to the process of extracting lithium from mineral deposits, the process of extracting lithium from evaporation ponds requires __less____ water, __less____ money, and ___less________ time.

Lithium extraction from salar brines are more economical to extract compared to extraction from their natural ore deposits. Salar brines occurs as liquid underground brine reservoirs. Once pumped to the surface in ponds, they are left to evaporate and the lithium is concentrated from them. Extraction from brines in ponds do not require water that much, less cost and if the evaporation rate is fast, a lot of time can be saved.

Extraction from mineral deposits require a lot of energy and time to achieve.

otez555 [7]3 years ago
4 0

Answer: More Less More is right

Explanation:

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2. A 100.00 mL volumetric flask is loaded with 1.60 grams of NaF. To this was added 30.0 mL of a 4.00 M solution of HF. When thi
Zina [86]

Answer:

pH of the final solution = 3.8

Explanation:

Concentration of NaF = \frac{1.6 X 1000}{42 X 100} molar

                                    = 0.3 molar

NaF → Na⁺ +    F⁻

HF   ⇆ H⁺    +    F⁻

  • NaF is strong electrolyte so completely ionized but HF weak acid not completely ionized.
  • Since F⁻ is common ion here

         according to common ion effect dissociation of weak acid decreases.

        Ka = \frac{[H]^{+}[F]^{-}  }{[HF]}

⇒    [H⁺]  = \frac{K_{a} [HF]}{[F]^{-} } ...............(1)

{Ka of HF = 3.5 x 10⁻⁴} & Concentration of HF = 30 x 4 x 10⁻³ = 0.12 molar

from equation 1

⇒ [H⁺]  = \frac{3.5 X 10^{-4}X 0.12 }{0.3}     [Concentration of F⁻ ≡ Concentration of NaF]

⇒ [H⁺] = 0.00014

⇒pH = - log 0.00014 = 3.85

3 0
3 years ago
What would make bromine, a group 17 element, more similar to a noble gas?
nlexa [21]

Thank you so much men nice well

5 0
3 years ago
Be sure to answer all parts. Propane (C3H8) is a minor component of natural gas and is used in domestic cooking and heating. (a)
Leokris [45]

<u>Answer:</u>

<u>For a:</u> The balanced chemical equation is given below.

<u>For b:</u> The mass of carbon dioxide produced will be 1.07\times 10^3g

<u>Explanation:</u>

  • <u>For a:</u>

Every balanced chemical equation follows law of conservation of mass.

This law states that mass can neither be created nor can be destroyed but it can only be transformed from one form to another form.

This law also states that the total number of individual atoms on the reactant side must be equal to the total number of individual atoms on the product side.

For the given reaction, the balance chemical equation follows:

C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g)

All the substances are present in gaseous state.

  • <u>For b:</u>

By Stoichiometry of the reaction:

1 mole of propane gas produces 3 moles of carbon dioxide gas.

So, 8.11 moles of propane gas will produce = \frac{3}{1}\times 8.11=24.33mol of carbon dioxide gas.

Now, calculating the mass of carbon dioxide using equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Molar mass of carbon dioxide = 44 g/mol

Moles of carbon dioxide = 24.33 mol

Putting values in above equation, we get:

24.33mol=\frac{\text{Mass of carbon dioxide}}{44g/mol}\\\\\text{Mass of carbon dioxide}=1070.52g

Hence, the amount of CO_2 produced in the given reaction and expressed in scientific notation is 1.07\times 10^3g

3 0
4 years ago
What does a mole of iron weigh
r-ruslan [8.4K]

As the atomic mass of iron is 55.847u

We say that it is the mass of one mole of iron.

By formula it can be find by

No.of mole=mass in g/molar mass

Mass in gram = no.of mole x molar mass

No.of mole =1

Molar mass = 55.847g

Mass in gram = 1x55.847

= 55.847g of Fe

3 0
4 years ago
Discord anyone? RaTqUeEn2#8785
GarryVolchara [31]
The answer would be letter A
6 0
3 years ago
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