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konstantin123 [22]
3 years ago
14

_________solution contains sodium hydroxide and copper sulphate​

Chemistry
2 answers:
Archy [21]3 years ago
8 0
Biuret reagent. This is the answer
Hunter-Best [27]3 years ago
8 0

Answer: Biuret Reagent

Explanation:

The reagent used in the Biuret Test is a solution of copper sulfate (CuSO4) and sodium hydroxide (NaOH).

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How many moles are present in 418.9 grams of mohr salt
aniked [119]

Answer: Incomplete/half answer

Explanation:

  grams of              molar mass of the

     substance                     substance in grams

–––––––––––  =  –––––––––––––––

moles of the

substance                      one mol

use this formula to asnwer the question

4 0
3 years ago
Potassium nitrate has a lattice energy of -163.8 kcal/mol and a heat of hydration of -155.5 kcal/mol.
Brut [27]

Answer:

<em>293.99 g </em>

OR

<em>0.293 Kg</em>

Explanation:

Given data:

Lattice energy of Potassium nitrate (KNO3) = -163.8 kcal/mol

Heat of hydration of KNO3 = -155.5 kcal/mol

Heat to absorb by KNO3 = 101kJ

To find:

Mass of KNO3 to dissolve in water = ?

Solution:

Heat of solution = Hydration energy - Lattice energy

                           = -155.5 -(-163.8)

                           = 8.3 kcal/mol

We already know,

1 kcal/mol = 4.184 kJ/mole

Therefore,

= 4.184 kJ/mol x 8.3 kcal/mol

= 34.73 kJ/mol

Now, 34.73 kJ of heat is absorbed when 1 mole of KNO3 is dissolved in water.

For 101 kJ of heat would be

= 101/34.73

= 2.908 moles of KNO3

Molar mass of KNO3 = 101.1 g/mole

Mass of KNO3 = Molar mass x moles

                         = 101.1 g/mole  x  2.908

                         = 293.99 g

                         = 0.293 kg

<em><u>293.99 g potassium nitrate has to dissolve in water to absorb 101 kJ of heat. </u></em>     

4 0
3 years ago
6. If the broken wire of the top branch
vagabundo [1.1K]

Answer: When two light bulbs are connected in parallel, which is true? A. The total resistance is less than the resistance of either bulb alone. B. The Voltage provided

Explanation:

3 0
1 year ago
1. What are the sources of water on Earth?
Lesechka [4]
Rivers, oceans, lakes, ponds
4 0
3 years ago
Read 2 more answers
2. A satellite can generate a maximum force of 550 N using its rockets. The
Gemiola [76]

The satellite's rockets fire in 18.54 s

<h3>Further explanation</h3>

Given

F- Force = 550 N

I - impulse = 10,200 kg m/s

Required

Fire time

Solution

Impulse is defined is the product of the force with the time interval when the force is acting on the object.  

Can be formulated :

I = F. Δt  

Δt  = I : F

Input the value :

\tt \Delta t=\dfrac{I}{F}\\\\\Delta t=\dfrac{10200}{550}\\\\\Delta t=\boxed{\bold{18.54~s}}

6 0
2 years ago
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