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zheka24 [161]
3 years ago
8

the relative molecular mass of sodium hydroxide is 40. if 60 grams of sodium hydroxide are dissolved in water how many moles wil

l there be in the solution?
Chemistry
1 answer:
goldfiish [28.3K]3 years ago
7 0
The formula to find the amount of moles of a substance used is: actual mass divided by relative molecular mass. 

Therefore,
60/40 = 1.5 moles
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Question 4
vazorg [7]

Answer:

H(aq) + NO3 (aq) + HF(aq)

Explanation:

In the given mixture of HNO3 (Nitric Acid) and HF (hydrofluoric acid) in water  the major species present are H(aq) + NO3 (aq) + HF(aq).

On the reaction of  HNO3 (Nitric Acid) and HF (hydrofluoric acid) in water  , it will give a polar solution and will form a homogenous mixture.

Hence, the correct answer is "H(aq) + NO3 (aq) + HF(aq)".

4 0
2 years ago
What are the challenges for a "sustainable" world of lithium ion batteries?
Neporo4naja [7]

The Lithium-ion Battery Problem

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7 0
2 years ago
A microwave operates at 7.42 mm wavelength. How much energy is produced in Joules from 359 photons?
alisha [4.7K]

Answer:

E=9.62\times 10^{-21}\ J

Explanation:

Given that,

The wavelength of a microwave is 7.42 mm or 0.00742 m

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E=\dfrac{nhc}{\lambda}\\\\E=\dfrac{359\times 6.63\times 10^{-34}\times 3\times 10^8}{0.00742}\\\\=9.62\times 10^{-21}\ J

or

E=9.62e^{-21}\ J

So, the required energy is 9.62\times 10^{-21}\ J.

3 0
3 years ago
Read 2 more answers
In the equation Na + Cl2 → 2NaCl . What is the product?
laila [671]
The product would be 2NaCI. Hope this helps xx
6 0
2 years ago
The electrolyte of the following is:
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An electrolyte is a term used to describe a compound that can dissociate into ions as it is nothing but an ionic compound, a salt made up of a positively charged cation and negatively charged anion.

Here the correct answer is D. Since there are no hydrocarbons or any other organic compound, that do not possess partial let alone full charges, all of them can dissociate in solution to give their ions.

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4 0
2 years ago
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