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olga_2 [115]
3 years ago
6

i need help with these. its balancing. the blank spaces are where u put the numbers. and the stuff on the sidd is how u show wor

k. i got lost and dont know what comes next​

Chemistry
1 answer:
zlopas [31]3 years ago
7 0
7. 1,2,2,2
8. 4,3,1
9. 1,4,1,2
10. 3,4,1,4
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A scientist triples the temperature of a gas at constant pressure. By what factor does the gas’s volume change?
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Aluminum sulfate, known as cake alum, has a wide range of uses, from dyeing leather and cloth to purifying sewage. In aqueous so
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Answer:

a) The chemical reaction is given as:

6NaOH(aq)+Al_2(SO_4)_3\rightarrow 2Al(OH)_3(s)+3Na_2SO_4(aq)

2.571 grams of aluminum hydroxide is precipitated.

Explanation:

a) The chemical reaction is given as:

6NaOH(aq)+Al_2(SO_4)_3\rightarrow 2Al(OH)_3(s)+3Na_2SO_4(aq)

b)

Moles of NaOH = n

Volume of the NaOH = 185.5 mL = 0.1855 L( 1 mL =0.001 L)

Molarity of the solution = 0.533 M

n=0.533 M\times 0.1855 mL=0.09887 mol

Moles of aluminum = n

15.8 g of aluminum sulfate per liter.

Volume of solution = 627 mL = 0.627 L (1 mL= 0.001 L)

Mass of aluminium sulfate in solution = 15.8 g/L × 0.627 L =9.9066 g

Moles of aluminum sulfate = \frac{9.9066 g}{342 g/mol}=0.02897 mol

Moles of NaOH = 0.09887 mol

According to reaction, 6 moles of NaOH reacts with 1 mole of aluminum sulfate, then 0.09887 moles of NaOH will recat with :

\frac{1}{6}\times 0.09887 mol=0.01648 mol

This means that sodium hydroxide moles are in limiting amount.So, amount of aluminum hydroxide will depend upon moles of sodium hydroxide.

According to reaction, 6 moles of sodium hydroxide gives 2 moles of aluminium hydroxide, then 0.09887 moles of sodium hydroxide will give :

\frac{2}{6}\times 0.09887 mol=0.03296 mol of aluminum hydroxide

Mass of 0.03296 moles of aluminum hydroxide:

0.03296 mol × 78 g/mol = 2.571 g

2.571 grams of aluminum hydroxide is precipitated.

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Give the formula for<br> heptafluorine tricarbide
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RnMxF7y− or RnMxF7y

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