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Fantom [35]
3 years ago
9

Which of these statements best explains why pure water has a pH of 7? Pure water contains only H2O molecules, but pH is based on

the concentration of H3O+ ions. Each molecule of water can dissociate to form 7 H3O+ ions. Water self-ionizes to form an equilibrium system that has [H3O+] = 1.0 × 10–7 M.
Chemistry
2 answers:
alexandr402 [8]3 years ago
8 0

Answer:

its c

Explanation:

on edge

Liula [17]3 years ago
5 0

Answer:water self-ionize to form an equilibrium system that has [h30+]=1.0x10^-7 M

Explanation:

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how many grams of potassium chloride, KCL(molar mass is 74.55g/mol) are produced if 25 grams of potassium chlorate KClo^3 decomp
JulsSmile [24]

Answer:

                     Mass = 15.20 g of KCl

Explanation:

                    The balance chemical equation for the decomposition of KClO₃ is as follow;

                                            2 KClO₃ = 2 KCl + 3 O₂

Step 1: Calculate moles of KClO₃ as;

Moles = Mass / M/Mass

Moles = 25.0 g / 122.55 g/mol

Moles = 0.204 moles

Step 2: Find moles of KCl as;

According to equation,

                  2 moles of KClO₃ produces  =  2 moles of KCl

So,

               0.204 moles of KClO₃ will produce  =  X moles of KCl

Solving for X,

                       X = 2 mol × 0.204 mol / 2 mol

                       X = 0.204 mol of KCl

Step 3: Calculate mass of KCl as,

Mass = Moles × M.Mass

Mass = 0.204 mol × 74.55 g/mol

Mass = 15.20 g of KCl

6 0
3 years ago
Every bronsted-lowry acid is also a lewis acid True or False
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X: glucose + oxygen ---- carbon dioxide + water
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Answer:

X

Explanation:

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1 year ago
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How many molecules of O2 are in 153.9 g O2?
MrRissso [65]

Answer:

2.895*10^24

Explanation:

mass of Oxygen give = 153.9g

molar mass of O2 molecule = 16*2=32g/mol

n= mole

To find the mole

n= mass/ molar mass

n= 153.9/32

n=4.81mol.

To find the number of molecules of o

Nm= number of molecule

Nn = Number of mole

NA = number of Avogados

Nm= Nn * NA

Nm= 4.81 *6.02*10^23

Nm= 2.895*10^24

3 0
3 years ago
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