2 years ago

Purpose Question:

Chemistry

2 answers:

SVETLANKA909090 [29]2 years ago

3 0

Answer:

I will take Aspirin if I had a headache

lubasha [3.4K]2 years ago

3 0

I believe it is Aspirin but i guess it depends on personal choice

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A 0.15 m solution of chloroacetic acid has a ph of 1.86. What is the value of ka for this acid?

dem82 [27]

Answer: $1.67\times 10^{-3}$

Explanation:

$ClCH_2COOH\rightarrow ClCH_2COO^-+H^+$

cM 0 0

$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Given: c = 0.15 M

pH = 1.86

$K_a$ = ?

Putting in the values we get:

Also $pH=-log[H^+]$

$1.86=-log[H^+]$

$[H^+]=0.01$

$[H^+]=c\times \alpha$

$0.01=0.15\times \alpha$

$\alpha=0.06$

As $[H^+]=[ClCH_2COO^-]=0.01$

$K_a=\frac{(0.01)^2}{(0.15-0.15\times 0.06)}$

$K_a=1.67\times 10^{-3]$

Thus the vale of $K_a$ for the acid is $1.67\times 10^{-3}$

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3 years ago

Water vapor also enters the atmosphere through —————(2 words), which takes place in many cells and produces water and carbon dio

yawa3891 [41]

Answer:

It is photosynthesis and transpiration 

hope it helps

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2 years ago

The "particles" of gases are actually atoms, or molecules. truefalse

kirill [66]

They are atoms. a molecule is made up of atoms.

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3 years ago

How many moles of lithium hydroxide are required to react with 19.2 mol CO2, the average amount exhaled by a person each day?

sladkih [1.3K]

Answer:

38.4 mol LiOH

Explanation:

Step 1: Write the balanced neutralization equation

2 LiOH + CO₂ ⇒ Li₂CO₃ + H₂O

Step 2: Establish the appropriate molar ratio

According to the balanced equation, the molar ratio of LiOH to CO₂ is 2:1.

Step 3: Calculate how many moles of lithium hydroxide are required to react with 19.2 mol CO₂

19.2 mol CO₂ × 2 mol LiOH / 1 mol CO₂ = 38.4 mol LiOH

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3 years ago

What is the oxidation number b in h3bo3?

Goryan [66]

H is positive 1 and o is negative 2 so 3+b-6=0 and solve for b to get b=3

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3 years ago