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Rus_ich [418]
3 years ago
8

Why do we use 51.0mL of NaOH but only 50.0mL of HCl?

Chemistry
1 answer:
bixtya [17]3 years ago
3 0

Answer

Na OH reacts with H Cl and forms Na Cl and H₂O

NaOH + HCl   →   NaCl + H₂O                                              

Here we can see that  1 mole of NaOH reacting with 1 mole of HCl and forming 1 mole of NaCl and 1 mole of H₂O

when  NaOH and HCl are added together in equal amount then they will completely neutralize each other but NaOH is hygroscopic in nature which means it can absorb water from air so it will not be weighted accurately.

hence, for neutralization we will take extra NaOH.

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Which has more thermal energy, 500g of ice or 500g of steam? explain your answer.
RUDIKE [14]
Steam because steam comes from water which the energy makes it into steam
7 0
4 years ago
Select 2-possible ointment bases. Select one or more:
fredd [130]

Answer:

The correct option is: c. petroleum jelly, d. Polyethylene glycol 4000/600 mixture                

Explanation:

Topical medications are used for the treatment of ailments and include ointments, gels, lotions creams etc. that can applied directly on the surface of the body i.e. skin.

An ointment base medication gets rapidly absorbed into the skin. Some of the examples of <u>ointment bases</u> include water-soluble bases: <u>polyethylene glycol</u>, hydrocarbon bases: <u>petroleum jelly</u>, paraffin wax.

7 0
3 years ago
Which of the following is used as a refrigerant?<br> methane<br> esters<br> freon<br> fluorine
zepelin [54]

Answer: I believe the answer would be methane

Explanation:

Hope this helps

6 0
3 years ago
Ammonium chloride is used as an expectorant in cough medicine. It has a density of 1.53 g/cm^3. What is the mass of 26.0L of thi
Katena32 [7]

Answer:

                     39.78 Kg

Explanation:

Data Given;

                  Density  =  1.53 g/cm³

                  Mass  =  <u>??</u>

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Formula Used;

                       The measure of mass per unit volume is called as density. It is a physical property of a substance and tells how tightly the particles are packed. Mathematically;

                  Density  =  Mass ÷ Volume

Solving for Mass,

                  Mass  =  Volume × Density

Putting values,

                  Mass  =  26000 cm³ × 1.53 g.mL⁻¹

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8 0
4 years ago
What are the missing coefficients for the skeleton equation below?
Vika [28.1K]

Answer:

C. Double Replacement

Explanation:

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B. Wrong because it does not have O2 in the formula. All combustion reactions must have O2.

C. Correct because it is a compound reacting with a compound.

D. Wrong because the reactants did not form a single product. ex. (x + y > xy)

E. Wrong because the equation did not start with a single compound and break down. ex. (xy > x + y)

3 0
3 years ago
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