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ivanzaharov [21]
3 years ago
11

A hydrobromic acid (HBr) solution has a molar concentration of 0.055 M, Calculate the and pH of the solution. (Remember that Kw=

1.0x10-14M2.)
A) [H3O+]= 5.5x10-2M, [OH-]=1.82x10-13M, pH=1.26
B) [H3O+]= 3.8x10-13, [OH-]=2.6x10-2M, pH=12.42
C) [H3O+]= 4.8x10-3, [OH-]=1.6x10-12M, pH=9.2
D) [H3O+]= 1.0x10-8 [OH-]=1.0x10-6M, pH=8.0
E) cannot be calculated with the information given
Chemistry
1 answer:
seraphim [82]3 years ago
5 0

Answer: Im not sure but i think its B

Explanation: Its hard to explain so im

not gonna do it

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After use, non-biodegradable plastics last for many years in __________ sites. Many also pollute the ocean.
Len [333]

Answer:

Land fill

Explanation:

A landfill is a carefully managed waste disposal site. It is the oldest method of waste disposal. In a dumpsite, biodegradable materials decay overtime.

However, non-biodegradable materials such as plastics and other polymers tend to last many years in landfills. This category of wastes pose a great threat to the environment.

7 0
2 years ago
The substances are placed in separate containers at room temperature, and each container is gradually cooled. Which of these sub
Digiron [165]

Answer:

Benzene

Explanation:

You have to find the freezing point for each of these (make sure they're in Celsius). You might want to double check these but:

Benzene: 5.5

Water: 0

Butane: -138

Nitrogen: -210

4 0
3 years ago
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Why is peer review important when publishing experimental results? A. Peer review makes the experiment repeatable. B. Peer revie
MA_775_DIABLO [31]
The answer is D. At least that's what I think.
4 0
3 years ago
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If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form
tigry1 [53]

Answer:

709 g  

Step-by-step explanation:

a) Balanced equation

Normally, we would need a balanced chemical equation.

However, we can get by with a partial equation, as log as carbon atoms are balanced.

We know we will need an equation with masses and molar masses, so let’s <em>gather all the information</em> in one place.  

M_r:    30.07          236.74

           C₂H₆ + … ⟶ C₂Cl₆ + …  

m/g:    90.0

(i) Calculate the moles of C₂H₆

n = 90.0 g C₂H₆  × (1 mol C₂H₆ /30.07 g C₂H₆)

  = 2.993 mol C₂H₆

(ii) Calculate the moles of C₂Cl₆

The molar ratio is (1 mol C₂Cl₆/1 mol C₂H₆)

n = 2.993 mol C₂H₆ × (1 mol C₂Cl₆/1 mol C₂H₆)

  = 2.993 mol C₂Cl₆

(iii) Calculate the mass of C₂Cl₆

m = 2.993 mol C₂Cl₆ × (236.74 g C₂Cl₆/1 mol C₂Cl₆)

m = 709 g C₂Cl₆

The reaction produces 709 g C₂Cl₆.

6 0
2 years ago
What does it mean if a solution is a "weak acid "? Strong acid? Give logical ph values for each
galina1969 [7]

Answer:

A weak acid is an acid that partially dissociates into its ions in an aqueous solution or water. In contrast, a strong acid fully dissociates into its ions in water. At the same concentration, weak acids have a higher pH value than strong acids.

Explanation:

:)

5 0
2 years ago
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