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3 years ago

Determine the mass of 5.20 moles of C6H12 (gram-formula mass = 84.2 grams/mole).

1 answer:

7 0

5.20 mol C6H12* (84.2 g/mol C6H12)= 4.38*10^(2) g C6H12.

The answer should only have three significant figures, according to the numbers in the problem.

Hope this is helpful~

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For which one of the following reactions is the value of ΔH°rxn equal to ΔH°f for the product?

noname [10]

Answer:

The reaction D has the value of ΔH°rxn equal to ΔH°f for the product.

Explanation:

The ΔH°f for product is equal to ΔH°rxn when the reagents are in their elemental state (ΔH°f = 0) and form one mole of product.

We have to find the reagents that are in their elemental state and that only form one mole of product:

A) 2Ca (s) + O₂ (g) → 2CaO (s)

The reagents are in their elemental state but the reaction forms two mole of product.

B) C₂H₂ (g) + H₂ (g) → C₂H₄ (g)

C₂H₂ (g) is not in its elemental state.

C) 2C (graphite) + O₂ (g) → 2CO (g)

Graphite and Oxygen are in their elemental state but the reaction forms two mole of product.

D) 3Mg (s) + N₂ (g) → Mg₃N₂ (s)

Magnesium and Nytrogen are in their elemental state and the reaction forms one mole of product.

E) C (diamond) + O₂ (g) → CO₂ (g)

Diamond is not in its elemental state.

8 0

3 years ago

What should we do to reduce the risk when working with concentrated acids and bases

Solnce55 [7]

What should be done to reduce the risk when working with concentrated acids and bases are;

1) Ensure that the concentrated acids and bases are stored separately in safety cabinets.

2) If you don't have separate safety cabinets and the must be stored in same cabinet, then you must ensure that they are stored in separate compartments.

3) Lastly, the separate compartments or cabinets must have their separate spill containment compounds.

When working with strong acids and bases during neutralization reactions, usually the production of gases can make the solution which is corrosive to splash and get to people around there.

Due to how strong the acids and base are, these splashes from the neutralized solution could have potentially damaging effects on humans when it contacts them by either casing skin burns or even blindness.

Now, to reduce the risk of the adverse effects stated above, what could be done is;

1) Ensure that the concentrated acids and bases are stored separately in safety cabinets.

2) If you don't have separate safety cabinets and the must be stored in same cabinet, then you must ensure that they are stored in separate compartments.

3) Lastly, the separate compartments or cabinets must have their separate spill containment compounds.

Read more at; brainly.com/question/17372836

5 0

2 years ago

One of the pieces of evidence supporting energy quantization was the line spectra of elements. Why does this demonstrate energy

bezimeni [28]

Answer:

c) There are sharp emission lines demonstrating discrete energy levels.

Explanation:

When an element emits energy in the form of radiation, it produces a spectrum of colors on a photographic plate. This spectrum can either be continuous or discrete. In continuous spectrum the spectrum continues without any discrimination between two regions. This represents the continuous emission of radiation, and thus the continuous emission of energy without any break.

On the other hand, the line spectrum consists of discrete and sharp lines, which shows the emission of radiation in a certain amount in a certain time, with a break between emission. Hence, the line spectra supports the quantization of energy.

The correct option is:

c) There are sharp emission lines demonstrating discrete energy levels.

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4 years ago

Currently, as Earth's surface becomes warmer, we believe that the level of carbon dioxide in the atmosphere is _____.

tatyana61 [14]

A. Increasing

This is due to the greenhouse effect

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3 years ago

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A mass of 80 grams of Bromine would be

Elis [28]

I’m pretty sure it’s a

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3 years ago