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maxonik [38]
3 years ago
5

This is a question in Seneca, plz help asap bc I can't skip it!!

Chemistry
1 answer:
Novosadov [1.4K]3 years ago
3 0

Answer:

Chromatography?

Explanation:

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Granite is a ________ that contains the mineral quartz. a. mineral c. rock b. glass d. mica
kow [346]
I think it would be C

7 0
3 years ago
Read 2 more answers
What does the treatment do for Down syndrome?
mojhsa [17]

Answer:

There is NO cure for Down Syndrome

Explanation:

Down syndrome cannot be cured. Early treatment programs can help improve skills. They may include speech, physical, occupational, and/or educational therapy. With support and treatment, many people with Down syndrome live happy, productive lives

6 0
3 years ago
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What mass of HCL, in grams, is required to react with 0.610 g of al(oh)3 ?
kompoz [17]

Answer: 0.8541 grams of HCl will be required.

Explanation: Moles can be calculated by using the formula:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Given mass of Al(OH)_3 = 0.610 g

Molar mass of Al(OH)_3 = 78 g/mol

\text{Number of moles}=\frac{0.610g}{78g/mol}

Number of moles of Al(OH)_3 = 0.0078 moles

The reaction between Al(OH)_3 and HCl is a type of neutralization reaction because here acid and base are reacting to form an salt and also releases water.

Chemical equation for the above reaction follows:

Al(OH)_3+3HCl\rightarrow AlCl_3+3H_2O

By Stoichiometry,

1 mole of  Al(OH)_3 reacts with 3 moles of HCl

So, 0.0078 moles of Al(OH)_3 will react with \frac{3}{1}\times 0.0078 = 0.0234 moles

Mass of HCl is calculated by using the mole formula, we get

Molar mass of HCl = 36.5 g/mol

Putting values in the equation, we get

0.0234moles=\frac{\text{Given mass}}{36.5g/mol}

Mass of HCl required will be = 0.8541 grams

3 0
3 years ago
If the solubility of sodium chloride is 36 grams per 100 grams of water, which of the following solutions would be considered un
Murrr4er [49]

Answer: If the solubility of sodium chloride is 36 grams per 100 grams of water then 5.8 moles of NaCl dissolved in 1 L of water solution would be considered unsaturated.

Explanation:

A solution which contains the maximum amount of solute is called a saturated solution. Whereas a solution in which more amount of solute is able to dissolve is called an unsaturated solution.

Now, the number of moles present in 36 g of NaCl (molar mass = 58.4 g/mol) is as follows.

No. of moles = \frac{mass}{molar mass}\\= \frac{36 g}{58.4 g/mol}\\= 0.616 mol

This shows that solubility of sodium chloride is 36 grams per 100 grams of water means a maximum of 0.616 mol of NaCl will dissolve in 100 mL of water.

So, a solution in which number of moles of NaCl are less than 0.616 mol per 100 mL then the solution formed will be an unsaturated solution.

  • As 5.8 moles of NaCl dissolved in 1 L (or 1000 mL) of water. So, moles present in 100 mL are calculated as follows.

Moles = \frac{5.8 mol}{1000 mL} \times 100 mL\\= 0.58 mol

  • Moles present in 100 mL of water for 3.25 moles of NaCl dissolved in 500 ml in water are as follows.

Moles = \frac{3.25 mol}{500 mL} \times 100 mL\\0.65 mol

  • Moles present in 100 mL of water for 1.85 moles of NaCl dissolved in 300 ml of water are as follows.

Moles = \frac{1.85 mol}{300 mL} \times 100 mL\\= 0.616 mol

Thus, we can conclude that if the solubility of sodium chloride is 36 grams per 100 grams of water then 5.8 moles of NaCl dissolved in 1 L of water solution would be considered unsaturated.

8 0
3 years ago
- What is the concentration of hydrogen ions if the pH is 12?
Xelga [282]

Answer:

There are

1.479

×

10

−

13

concentration of hydrogen ions

m

o

l

L

.

Explanation:

Because pH is a logarthmic scale, we can use the formula:

[

H

+

]

=

10

-pH

. Where...

=>

[

H

+

]

is the concentration of hydrogen ions in the solution.

=>

p

H

is the pH of the solution.

=> Where

10

is the base of the power - it's a logarithm formula.

We can now just sub in the values and solve for [

H

+

]

.

[

H

+

]

=

10

-pH

=

10

−

(

12.83

)

=

1.479108388

×

10

−

13

We can round (if required) to

1.479

×

10

−

13

.

Thus, there are

1.479

×

10

−

13

concentration of hydrogen ions

m

o

l

L

.

Hope this helps :)

5 0
2 years ago
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