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Bingel [31]
4 years ago
9

Escriba las fórmulas de los siguientes compuestos iónicos:

Chemistry
1 answer:
IrinaK [193]4 years ago
6 0
Fluoruro de bario estoy casi segura que es correcto
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What is the mass of 1 mole of KBr
Reptile [31]
In grams it's 119.0023
8 0
3 years ago
How many grams of an 8% w/w progesterone gel must be mixed with 1.45 g of a 4% w/w progesterone gel to prepare a 5.5% w/w gel?
Nimfa-mama [501]

Answer: 0.87 g of an 8% w/w progesterone gel must be mixed with 1.45 g of a 4% w/w progesterone gel to prepare a 5.5% w/w gel.

Explanation:

According to the dilution law,

C_1w_1+C_2w_2=C_3w_3

where,

C_1 = concentration of ist progesterone gel = 8%w/w

w_1 = weight of ist progesterone gel  = x g

C_2 = concentration of another progesterone gel  = 4% w/w

w_2 = weight of another progesterone gel = 1.45 g

C_3 = concentration of resulting progesterone gel  = 5.5%w/w

w_3 = weight of resulting progesterone gel  = (x+1.45) g

8\times x+4\times 1.45=5.5\times (x+1.45)

x=0.87

Thus 0.87 g of an 8% w/w progesterone gel must be mixed with 1.45 g of a 4% w/w progesterone gel to prepare a 5.5% w/w gel.

4 0
4 years ago
In carbon dioxide, London dispersion forces are the only intermolecular forces of
LUCKY_DIMON [66]

Answer:

true

Explanation:

CO has two C-O bonds. The dipoles point in opposite directions, so they cancel each other out. Thus, although CO₂ has polar bonds, it is a nonpolar molecule. Therefore, the only intermolecular forces are London dispersion forces.

8 0
3 years ago
(a) Kw = 1.139 × 10⁻¹⁵ at 0°C and 5.474 × 10⁻¹⁴, find [H₃O⁺] and pH of water at 0°C and 50°C.
kondor19780726 [428]

The  value of [H₃O⁺] and  pH of water at 0°C and 50°C.

0°C value of [H₃O⁺] = 3.375 x 10⁻⁸

50°C value of [H₃O⁺]  = 2.340 x 10⁻⁷

pH of water at 0°C  =  pH = 7.4717

pH of water at 50°C  =  pH  = 6.6308

<h3>pH of water at different level:</h3>

Water with a pH less than 7 is considered acidic, while water with a pH greater than 7 is considered basic. The normal pH range for surface water systems is 6.5 to 8.5, and for groundwater systems is 6 to 8.5. Alkalinity is a measure of a water's ability to withstand a pH change that would cause it to become more acidic.

<h3>According to the given information:</h3>

0°C  =  Kw = 1.139 × 10⁻¹⁵

50°C = 5.474 × 10⁻¹⁴

Solving at  0°C  for  [H₃O⁺] and pH. water is neutral therefore its[H₃O⁺] [OH⁻]

are equal [H₃O⁺] = [OH⁻].

                                                Kw  =  [H₃O⁺] [OH⁻]

                                                  Kw  =  [H₃O⁺]²

                                                  [H₃O⁺] =  √Kw

                                                            =  √1.139 × 10⁻¹⁵

                                                            = 3.375 x 10⁻⁸

                                                pH = -log[H₃O⁺]

                                                      = -log 3.375 x 10⁻⁸

                                                      = 7.4717

Solving at  50°C  for  [H₃O⁺] and pH. water is neutral therefore its[H₃O⁺] [OH⁻]

are equal [H₃O⁺] = [OH⁻].

                                                 Kw  =  [H₃O⁺] [OH⁻]

                                                  Kw  =  [H₃O⁺]²

                                                  [H₃O⁺] =  √Kw

                                                             = √ 5.474 × 10⁻¹⁴

                                                            = 2.340 x 10⁻⁷ M

                                                 pH = -log[H₃O⁺]

                                                       =  -log2.340 x 10⁻⁷

                                                   pH  = 6.6308

The  value of [H₃O⁺] and  pH of water at 0°C and 50°C.

0°C value of [H₃O⁺] = 3.375 x 10⁻⁸

50°C value of [H₃O⁺]  = 2.340 x 10⁻⁷

pH of water at 0°C  =  pH = 7.4717

pH of water at 50°C  =  pH  = 6.6308

To know more about pH of water visit:

brainly.com/question/13822050

#SPJ4

I understand that the question you are looking for is:

Kw = 1.139 × 10⁻¹⁵ at 0°C and 5.474 × 10⁻¹⁴, find [H₃O⁺] and pH of water at 0°C and 50°C. find the  [H₃O⁺] and  pH of water at 0°C and 50°C.

 

3 0
2 years ago
Pls help I’ll mark brainliest pls pls pls
katovenus [111]
The tea was no longer hot or (brewed) so the 5th didn’t dissolve like the others because the tea was hot or warm enough anymore it cooled down. So the sugar won’t dissolve no more.
7 0
3 years ago
Read 2 more answers
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