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Ludmilka [50]
3 years ago
5

Arenediazoniums can undergo electrophilic aromatic substitutions with a wide variety of activated aromatic compounds to yield ne

w azo dyes.
a. True
b. False
Chemistry
1 answer:
mel-nik [20]3 years ago
4 0
B false
I did this last year and it’s false
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1. How much magnesium oxide is produced if 12.1 g of magnesium reacts with 16 g of oxygen
melamori03 [73]

Answer:

20.2g (3 s.f.)

Explanation:

Please see attached picture for full solution.

8 0
3 years ago
A saline solution contains 1.1% NaCl by mass. How much NaCl is present in 96.3 g of this solution
timurjin [86]

Answer:

= 1.0593 g

Explanation:

1.1% NaCl by mass, means;

1.1 g per 100 g = 0.011

Therefore; the amount of NaCl present in 93.6 g of the solution is;

= 0.011 × 96.3 g

<u>= 1.0593 g</u>

8 0
4 years ago
At 189k a sample of gas has a volume of 32.0cm. what does the gas occupy at 242k
sattari [20]
<h2>Answer:</h2>

At 189 K volume = 32.0 cm

As volume of gas is directly proportional to temperature.

As the temperature increase the volume of gas will also increase.

so

Volume at 1 K =  32/189

Volume at 242 K = 32/189 * 242 = 40.97 cm.

Gas occupy 40.97 cm volume at 242 K.



5 0
4 years ago
Why is the circulatory system so important? please explain in own yours I keep getting copy and paste please don’t do that it’s
expeople1 [14]

<u>Importance </u><u>of </u><u>Circulatory </u><u>System</u>

  • This system helps in transportation of respiratory gases like O2 and CO2, nutrients, hormones, enzymes, minerals, waste products.
  • It helps in storage of essential substances for future use.
  • It also generates heat to the body.

Hope you could understand.

If you have any query, feel free to ask.

7 0
3 years ago
Identify the effect of increasing acidity on the solubility of the given compounds Sr(OH)2 S r( O H) Subscript2 ZnS Z n S PbBr2
Dafna1 [17]

Answer:

Solubilities of Sr(OH)_{2},ZnS,Ca_{3}(PO_{4})_{2} and BaCO_{3} increases with increasing acidity

Explanation:

Sr(OH)_{2}\rightleftharpoons Sr^{2+}+2 OH^{-}

Concentration of OH^{-} decreases with increasing acidity. Therefore solubility of Sr(OH)_{2} increases to keep constant solubility product.

ZnS\rightleftharpoons Zn^{2+}+S^{2-}

Concentration of S^{2-} decreases with increasing acidity due to formation of H_{2}S. therefore solubility of ZnS increases to keep constant solubility product

PbBr_{2}\rightleftharpoons Pb^{2+}+2Br^{-}

Increasing acidity have no effect on this above equilibrium. Therefore solubility of PbBr_{2} remains constant.

Ca_{3}(PO_{4})_{2}\rightleftharpoons 3Ca^{2+}+2PO_{4}^{3-}

Concentration of PO_{4}^{3-} decreases with increasing acidity due to formation of H_{3}PO_{4}. Therefore solubility of Ca_{3}(PO_{4})_{2} increases to keep constant solubility product.

NaI\rightleftharpoons Na^{+}+I^{-}

Increasing acidity have no effect on this above equilibrium. Therefore solubility of NaI remains constant.

BaCO_{3}\rightleftharpoons Ba^{2+}+CO_{3}^{2-}

Concentration of CO_{3}^{2-} decreases with increasing acidity due to formation of H_{2}CO_{3}. Therefore solubility of BaCO_{3} increases to keep constant solubility product.

5 0
3 years ago
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