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3 years ago

CHEMISTRY HELP ASAPP

Chemistry

1 answer:

tensa zangetsu [6.8K]3 years ago

7 0

13% hope this helps my guys

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What is the pH of a 3.5 x 10-5 M solution of HCl?

Luden [163]

Answer:

pH = 4.45

Explanation:

We need to find the pH of $3.5\times 10^{-5}\ M$ solution of HCl. We know that, pH of a solution is given by :

$pH=-log[H]^+$

Put all the values,

$pH=-log[3.5\times 10^{-5}]\\\\pH=4.45$

So, the pH of the solution of HCl is 4.45.

5 0

3 years ago

2. C₂H6 + O2 H20 + CO2

kolbaska11 [484]

Answer:

$C_{2}H_{6} +O_{2} -> H_{2}O+CO_2$ is a combustion reaction

Explanation:

The reaction is a combustion since you have a hydrocarbon reacting with oxygen to form water and carbon dioxide.

The balanced equation is: $2C_{2}H_{6} +7O_{2} ->4H_{2}O+6CO_2$

If this helped, a brainliest answer would be greatly appreciated!

4 0

3 years ago

How many grams of Fe can be produced when 6.10 g of Fe2O3 reacts?

Arte-miy333 [17]

Tell you what - the more likely scenario is that iron reacts with oxygen to form 6.2g of Fe2O3. That's the rusting of iron; I don't know if you can "un-rust" iron back into pure iron and oxygen. So we'll go with this equation:

4Fe + 3O2 --> 2Fe2O3.

Iron (Fe) is our unknown. Okay, Fe2O3, which is iron(III) oxide, has a given mass of 6.2g, and according to the Periodic Table, it's molar mass, or grams per 1 mole, is 160g/mol (56+56+16+16+16). Do a 1-step molar conversion to get about 0.03875 moles. Apply this to the molar ratio of coefficients in the balanced equation: the ratio is 2:4, or 1:2, so you will double that to 0.0775 moles of iron. Now do a 1-step molar conversion with iron's Atomic Mass to get your grams of iron: 0.0775 moles x 56 grams per mole = 4.34 grams Fe.

4 0

3 years ago

You may have to recrystallize any or all of the components of your extraction mixture, benzoic acid, ethyl-4-aminobenzoate and f

hjlf

Answer:

the Recrystallization solvents are;

-Sodium Hydroxide Base (NaOH)

- Hydrochloric Acid (HCl)

- Sand bath when acidic and basic components are removed.

Explanation:

Recrystallization is simply a technique used to purify an impure compound in a solvent.

Now, we want to purify the mixture of benzoic acid, Ethyl-4-aminobenzoate and fluorenone.

For the benzoic acid, it can be separated out of the mixture by addition of sodium hydroxide base (NaOH).

The Ethyl - 4 - aminobenzoate will be separated from the mixture by the addition of Hydrochloric Acid (HCl).

The fluorenone would be separated out by heating the mixture in a sand bath after the basic and acidic components have already been extracted out.

Thus, the Recrystallization solvents are;

-Sodium Hydroxide Base (NaOH)

- Hydrochloric Acid (HCl)

- Sand bath when acidic and basic components are removed.

6 0

3 years ago

HELP PLEASE ! ! DUE TODAY

slega [8]

Answer:

B is the correct answer I say

5 0

3 years ago

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