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schepotkina [342]

3 years ago

5

The Tisza-Danube cyanide spill is an example of all of the following except a general pollution. b accidental pollution. c point

-source pollution. d transboundary pollution.

1 answer:

Serjik [45]3 years ago

4 0

Answer: Its B!

Explanation:

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What is the suitable way of investigating the different food colourings in some drinks ?

Firlakuza [10]

Answer:

by using the chromatography you can separate different color

6 0

2 years ago

A 5.22 × 10−3−mol sample of HY is dissolved in enough H2O to form 0.088 L of solution. If the pH of the solution is 2.37, what i

OleMash [197]

Answer:

3.07 × 10⁻⁴

Explanation:

Step 1: Calculate the concentration of H⁺

We will use the definition of pH.

$pH = -log [H^{+} ]\\\[ [H^{+} ] = antilog -pH = antilog -2.37 = 4.27 \times 10^{-3} M$

Step 2: Calculate the concentration of HY

5.22 × 10⁻³ mol of HY are dissolved in 0.088 L. The concentration of the acid (Ca) is:

$Ca = \frac{5.22 \times 10^{-3} mol }{0.088L} = 0.0593M$

Step 3: Calculate the acid dissociation constant (Ka)

We will use the following expression.

$Ka = \frac{[H^{+}]^{2} }{Ca} = \frac{(4.27 \times 10^{-3} )^{2} }{0.0593} = 3.07 \times 10^{-4}$

6 0

3 years ago

True or false lightning is a strong electrical current moving through air

victus00 [196]

Answer:

electrons is the answer to your question

5 0

3 years ago

Read 2 more answers

Andrei [34K]

Answer:

1. FeSO4+2NaOH→Na2SO4+Fe(OH)2

2. Fe(NO3)3+3NaOH→Fe(OH)3+3NaNO3

3. 382 g NaNO3

Explanation:

1. This is a double displacement reaction so perform exchanges with specimens and balance accordingly.

2. This is a double displacement reaction so perform exchanges with specimens and balance accordingly.

3. Start with 1.5 mol of Fe(NO3)3 then include mole to mole ratio of NaNO3 to Fe(NO3)3 then multiply by molar mass of Fe(NO3)3.

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3 years ago

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What characteristics does an acid have

elena55 [62]

Answer:

acid is corrosive in nature

acid changes blue litmus to red

acid reacts with base to produce salt and water

4 0

3 years ago