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GalinKa [24]
3 years ago
14

Ka for acetylsalicylic acid (aspirin), hc9h7o4, is 3.00×10-4. ka for hydrocyanic acid, hcn, is 4.00×10-10. ka for benzoic acid,

c6h5cooh, is 6.30×10-5. what is the formula for the strongest acid?
Chemistry
1 answer:
Nataly_w [17]3 years ago
3 0
Ka is the acid-dissociation constant of each of these acids. It represents the proportion of a given amount of the acid that dissociates from the acid into H+ and it’s conjugate base when dissolved into solution.

The concentration of H+ determines the strength of the acids, so those acids with the biggest Ka values are the strongest acids.

Your order would be:
Aspirin (strongest)
Benzoic
Hydrocyanic (weakest)
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The answer is 25 grams for this question

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Use the reaction given below to solve the problem that follows: Calculate the mass in grams of aluminum oxide produced by the re
bearhunter [10]

Answer:  28.4 g of aluminum oxide is produced by the reaction of 15.0 g of aluminum metal

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}   

\text{Moles of} Al=\frac{15.0g}{27g/mol}=0.556moles

The balanced chemical equuation is:

4Al+3O_2\rightarrow 2Al_2O_3  

According to stoichiometry :

4 moles of Al produce == 2 moles of Al_2O_3

Thus 0.556 moles of Al will produce=\frac{2}{4}\times 0.556=0.278moles  of Al_2O_3

Mass of Al_2O_3=moles\times {\text {Molar mass}}=0.278moles\times 102g/mol=28.4g

Thus 28.4 g of aluminum oxide is produced by the reaction of 15.0 g of aluminum metal.

7 0
2 years ago
. How many moles of ammonia gas, NH3, are required to fill a volume of 50 liters at STP?
murzikaleks [220]
In STP every 22.4 litters is 1 mol
6 0
3 years ago
Read 2 more answers
How do you Convert 19mL to pL?
s2008m [1.1K]

Picoliter is a unit of measurement for liquids.

One picoliter = 1×10⁻⁹ mililiters

So:

19 mL ---- x pL

1×10⁻⁹ mL ---- 1 pL

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x = 1,9 × 10¹⁰ pL

or 19,000,000,000 pL

Answer: 1.9 × 10¹⁰ pL

7 0
1 year ago
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Kaylis [27]

Answer:

B, E

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