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3 years ago

HELP PLEASE!!!! I GIVE 21 POINTS +++ BRAINLIEST!!!!!!!

1 answer:

8 0

It looks like they have the same effect as divers. Because of fear, whales rise up too quickly causing gas bubbles to enter they blood vessels and causing small gashes in their bones as well.

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Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below. 2HgO Rig

BigorU [14]

Taking into account the reaction stoichiometry, the correct answer is the third option: 15.63 moles of HgO are needed to produce 250 g of O₂.

In first place, the balanced reaction is:

2 HgO → 2 Hg + O₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

HgO: 2 moles
Hg: 2 moles
O₂: 1 moles

The molar mass of the compounds is:

HgO: 216.59 g/mole
Hg: 200.59 g/mole
O₂: 32 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

HgO: 2 moles× 216.59 g/mole= 433.18 grams
Hg: 2 moles× 200.59 g/mole= 401.18 grams
O₂: 1 mole× 32 g/mole= 32 grams

Then the following rule of three can be applied: if by reaction stoichiometry 32 grams of O₂ are produced by 2 moles of HgO, 250 grams of O₂ are produced from how many moles of HgO?

$moles of HgO=\frac{250 grams of O_{2} x2 moles of HgO}{32grams of O_{2}}$

moles of HgO= 15.625 moles≅ 15.63 moles

Finally, the correct answer is the third option: 15.63 moles of HgO are needed to produce 250 g of O₂.

Learn more about reaction stoichiometry:

5 0

3 years ago

The body metabolizes glucose (C6H12O6) by burning it with oxygen to produce carbon dioxide, water and energy. If 3 moles of gluc

zhannawk [14.2K]

Answer: 18g

Explanation:

1 mle of glucose combusts to give 6moles of CO2 and 6moles of H2O

C6H12O6 + 6O2-------- 6CO2 + 6H2O at STP.

Multiplying 6 by 3 moles we have 18 g of CO2

7 0

3 years ago

What would be a rule to help you identify foods containing carbohydrates?

abruzzese [7]

Answer:

In order to help identify foods containing carbohydrates,

-Anything that contains sugar, starch, or cellulose is a carbohydrate.

-Anything that contains fiber is a carbohydrate.

-Anything that is derived from plants is a carbohydrate.

-Anything that contains dairy or gluten is a carbohydrate.

5 0

3 years ago

Where does the object have the greatest potential and kinetic energy Help plzzz

Fittoniya [83]

Answer:

Explanation:

I believe it is one because the energy is stored right before it falls

7 0

3 years ago

How is the law of conservation of mass applied to ecology?

zmey [24]

Answer:

The Law of Conservation of Mass tells us that matter is neither created nor destroyed during a chemical reaction. ... The Law of Conservation of Mass applies as the total mass of the products is equal to the total mass of the reactants.

Explanation:

7 0

3 years ago

Read 2 more answers