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3 years ago

12

If petrochemicals and ALL products made from them, suddenly disappeared last night, describe one drastic change in YOUR life tha

t would have negatively affected YOU PERSONALLY when you woke up this morning. Be specific.

1 answer:

EastWind [94]3 years ago

7 0

I hope you get a 100 on your assignment!

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In water, Vanillin, C8H8O3, has a solubility of 0.070 moles of vanillin per liter of solution at 25C. What will be produced if 5

Rufina [12.5K]

Answer:

The full amount (5.00 g) will be dissolved in 1 L of water at 25°C.

Explanation:

The molecular weight (MW) of Vanillin (C₈H₈O₃) is calculated from the chemical formula as follows:

MW(C₈H₈O₃) = (12 g/mol x 8) + (1 g/mol x 8) + (16 g/mol x 3) = 152 g/mol

If 0.070 mol of C₈H₈O₃ are soluble per liter of water at 25°C, the maximum mass that can be dissolved in 1 L is:

0.070 mol x 152 g/mol = 10.64 g

Since 5.00 g is lesser than the maximum amount that can be dissolved (10.64 g), the added amount will be completely dissolved in 1 L of water at 25°C.

7 0

3 years ago

Which Group 15 element exists as diatomic molecules at STP?

ikadub [295]

Answer: The correct option is 2.

Explanation: Group 15 elements are Nitrogen, phosphorous, Arsenic, Antimony, Bismuth.

To know whether an element exits as a diatomic molecule or not, we look at the atomicity of an element.

Atomicity is the number of atoms of an element combining to form a molecule.

Atomicity of Nitrogen = 2

Atomicity of Phosphorous = 4

Atomicity of Bismuth = 1

Atomicity of Arsenic = 1

The element having atomicity 2 will exist as a diatomic molecule.

Hence, Nitrogen is a diatomic molecule $(N_2)$

4 0

3 years ago

Read 2 more answers

If the (H+) is 2.1×10^-12 MHCIO4, What is the PH? is the solution ACIDIC, BASIC or NEUTRAL.

Lilit [14]

Explanation:

The pH of a substance can be found by using the formula

$pH = - log[ H^{ + } ]$

where [ H+ ] is the hydrogen ion concentration in the substance

From the question

[ H+ ] = 2.1 × 10-¹² M

To find the pH substitute the value into the above formula

We have

$pH = - log(2.1 \times {10}^{ - 12} ) \\ = 11.6777807 \: \: \: \: \: \:$

We have the answer as

<h2>pH = 11.7 </h2>

The solution is basic since it lies in the basic region that is from 8 to 14

Hope this helps you

8 0

3 years ago

Avogadro's number is equal to?

Lerok [7]

Answer:

6.273×10²³

Explanation:

hope this is useful friend

4 0

4 years ago

Read 2 more answers

Name 8 ways why landfill is bad for earth

Sergio039 [100]

Answer:

1.Creates environmental hazards

2.Can contribute to global warming processe

3.Can pollute harmful and toxic things in the air

4.has harmful gases that can hurt the environment including the water and soil

5.A waste of space that is taking up the earth

6.full of rubbish and toxins that can effect the environment

7.can hurt humans and animals because of the toxic chemicals produced in the air

8.Make the land soil weaker because of the bad toxins and chemicals

4 0

3 years ago