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3 years ago

15

Which of the following does not represent a molecular compound ?

1 answer:

SVETLANKA909090 [29]3 years ago

3 0

B) bal2 is the answer

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Mandarinka [93]

Answer. One of the key components of the softgel capsule is the plasticizer used to make the shell elastic and pliable and to minimize brittleness and cracking. The plasticizer usually accounts for 20-30% of the wet gel formulation which can impact the quality of the finished product.

Explanation:

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3 years ago

What does expunge mean?

trasher [3.6K]

It means is where something is removed or erased completely or something unwanted or unpleasant.

Hope this helps and the right meaning of expunge.

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3 years ago

Calculate the pH for the following weak acid. A solution of HCOOH has 0.12M HCOOH at equilibrium. The Ka for HCOOH is 1.8×10−4.

Shtirlitz [24]

Answer:

the pH of HCOOH solution is 2.33

Explanation:

The ionization equation for the given acid is written as:

$HCOOH\leftrightarrow H^++HCOO^-$

Let's say the initial concentration of the acid is c and the change in concentration x.

Then, equilibrium concentration of acid = (c-x)

and the equilibrium concentration for each of the product would be x

Equilibrium expression for the above equation would be:

$\Ka= \frac{[H^+][HCOO^-]}{[HCOOH]}$

$1.8*10^-^4=\frac{x^2}{c-x}$

From given info, equilibrium concentration of the acid is 0.12

So, (c-x) = 0.12

hence,

$1.8*10^-^4=\frac{x^2}{0.12}$

Let's solve this for x. Multiply both sides by 0.12

$2.16*10^-^5=x^2$

taking square root to both sides:

$x=0.00465$

Now, we have got the concentration of $[H^+] .$

$[H^+] = 0.00465 M$

We know that, $pH=-log[H^+]$

pH = -log(0.00465)

pH = 2.33

Hence, the pH of HCOOH solution is 2.33.

7 0

3 years ago

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Please mark all that apply!

Nitella [24]

Answer:

F G there you go the guy on top is right

Explanation:

F G

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3 years ago

Balance the following reaction. P4 + 3 O2 → 2P2O5

agasfer [191]

Answer:

P₄ + 5O₂ → 2P₂O₅

Explanation:

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3 years ago

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