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nata0808 [166]
2 years ago
15

What is the valency of aluminum in aluminum chloride? A. 1B.2C.3D.4​

Chemistry
2 answers:
viva [34]2 years ago
7 0
C ....:: the answer
Alinara [238K]2 years ago
5 0

Answer:

C.3

13AL

2.8.3

The number of electrons from the outermost shell is the valence of the element.

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How many moles of C2H2 are needed to react completely with 84 mol O2
Butoxors [25]

Balanced chemical equation:

2 C2H2 + 5 O2 = 4 CO2 + 2 H2O

2 moles C2H2 ---------------- 5 moles O2
moles C2H2 ------------------ 84 moles O2

moles C2H2 = 84 * 2 / 5

molesC2H2 = 168 / 5 => 33.6 moles of C2H2
4 0
3 years ago
How many significant digits are in 2804
docker41 [41]

Answer:

4 significant digits

Explanation:

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4 0
3 years ago
Enter your answer in the provided box. Find the pH of a buffer that consists of 0.34 M HBrO and 0.89 M KBrO (PK, of HBrO = 8.64)
11111nata11111 [884]

Answer : The  pH of buffer is 9.06.

Explanation : Given,

pK_a=8.64

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Concentration of KBrO = 0.89 M

Now we have to calculate the pH of buffer.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[Salt]}{[Acid]}

pH=pK_a+\log \frac{[KBrO]}{[HBrO]}

Now put all the given values in this expression, we get:

pH=8.64+\log (\frac{0.89}{0.34})

pH=9.06

Therefore, the pH of buffer is 9.06.

6 0
3 years ago
A sample of ideal gas at room temperature occupies a volume of 12.0 L at a pressure of 802 torr . If the pressure changes to 401
Blababa [14]

 The new  volume  is  2.4 L

<u><em> calculation</em></u>

The new volume is calculated using Boyle's  law formula

That  is  P₁V₁=P₂V₂

where,

p₁ =  802 torr

V₁ = 12.0 l

P₂ = 4010 torr

V₂=?

make  V₂ the subject of the formula  by diving  both side of equation by P₂

V₂ = P₁V₁/P₂

V₂  is therefore = {(12.0 l × 802 torr) 4010 torr}  = 2.4 L


7 0
2 years ago
An atom bonds with anotha r atom what is the best classification for this reaction
likoan [24]
A chemical bond is the best classification.
6 0
2 years ago
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