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ad-work [718]
3 years ago
6

Which combustion reaction is balanced correctly

Chemistry
2 answers:
steposvetlana [31]3 years ago
7 0

Answer:

the picture tells you how to do combustion

Explanation:

g100num [7]3 years ago
4 0
Is there a picture???
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A buffer is prepared by mixing 204.0 mL of 0.452 mol/L hydrochloric acid (HCI) and 500.0 mL of 0.400 mol/L sodium acetate (NaCHC
Alex73 [517]

Answer:

pH of buffer is 4.81

Explanation:

The reaction between HCl and sodium acetate will product acetic acid. The presence of weak acid (acetic acid) and its salt will make a buffer.

The reaction will be:

CH_{3}COONa + HCl --> CH_{3}COOH + NaCl

Thus one mole each of HCl and acetate will give one mole of acetic acid.

The moles of HCl present = molarity X volume = 0.452 X 0.204 =0.092

moles of acetic acid formed on reaction of HCl with acetate = 0.092

Initial moles of sodium acetate present = molarity X volume = 0.4X0.5 =0.2

moles of sodium acetate left =0.108 mol

the pKa of acetic acid =4.74

The pH of buffer is calculated using Henderson Hassalbalch's equation :

pH = pKa + log\frac{[salt]}{[acid]}

pH = 4.74 +log\frac{0.108}{0.092} =4.81

8 0
3 years ago
Metals exhibit
Deffense [45]

Answer:

B

Explanation:

This is because conductivity depends on the mobility of electrons.

3 0
3 years ago
1. Determine the molarity given 0.6762 mol KOH and a volume of<br> 500.00 mL.
astra-53 [7]

Answer:

1.352 M

Explanation:

Molarity is equal to the moles of the substance divided by the volume in Liters. First convert mL to L. 500.00 mL is 0.50000 L. Divide 0.6762 by 0.5 and remember to keep a maximum of 4 significant figures. :)

8 0
3 years ago
What is one use of the mineral gypsum fertilizer medicine wallboard electrical insulator
zvonat [6]

Answer:

Fertilizer

Explanation:

3 0
2 years ago
Read 2 more answers
Physical and chemical properties<br><br> what is density when mass is 5.2 and volume is 0.117
zimovet [89]
Density = mass / volume

D = 5.2 / 0.117

D = 44.44
3 0
3 years ago
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