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Tatiana [17]
3 years ago
7

Atoms are bonded together in a different order in

Chemistry
2 answers:
Savatey [412]3 years ago
4 0

Answer:

answer.A

Explanation:

that is my answer

Romashka-Z-Leto [24]3 years ago
3 0
The answer will be A I hope I helped
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What is the chemical formula for lead IV oxide
cupoosta [38]

Answer:

PbO2

Explanation:

7 0
3 years ago
PLEASE HELP!! I have to pass this class! Anything!!
Georgia [21]

Answer:

We'll have 8.0 moles Fe3O4 and 4.0 moles CO2

Explanation:

Step 1: data given

Number of moles Fe2O3 = 12.0 moles

Number of moles CO = 12.0 moles

Step 2: The balanced equation

3Fe2O3 +CO → 2Fe3O4 + CO2

Step 3: Calculate the limiting reactant

For 3 moles Fe2O3 we need 1 mol CO to produce 2 moles Fe3O4 and 1 mol CO2

Fe2O3 is the limiting reactant. It will completely be consumed (12.0 moles).

CO is in excess. There will react 12.0 / 3 = 4.0 moles

There will remain 12.0 - 4.0 = 8.0 moles

Step 4: Calculate moles products

For 3 moles Fe2O3 we need 1 mol CO to produce 2 moles Fe3O4 and 1 mol CO2

For 12.0 moles Fe2O3 we'll have 2/3 * 12.0 = 8.0 moles Fe3O4

For 12.0 moles Fe2O3 we'll have 12.0 / 3 = 4.0 moles CO2

We'll have 8.0 moles Fe3O4 and 4.0 moles CO2

6 0
4 years ago
A solution is made by dissolving
AVprozaik [17]

Answer:

0.342 m

Explanation:

From the question given above, the following data were obtained:

Mass of NaBr = 14.57 g

Mass of water = 415 g

Molar mass of NaBr = 102.89 g/mol

Molality of NaBr =?

Next, we shall determine the number of mole in 14.57 g of NaBr. This can be obtained as follow:

Mass of NaBr = 14.57 g

Molar mass of NaBr = 102.89 g/mol

Mole of NaBr =?

Mole = mass / molar mass

Mole of NaBr = 14.57 / 102.89

Mole of NaBr = 0.142 mole

Next, we shall convert 415 g of water to kg. This can be obtained as follow:

1000 g = 1 Kg

Therefore,

415 g = 415 g × 1 Kg / 1000 g

415 g = 0.415 Kg

Thus, 415 g is equivalent to 0.415 Kg.

Finally, we shall determine Molality of the solution as follow:

Mole of NaBr = 0.142 mole

Mass of water = 0.415 Kg

Molality of NaBr =?

Molality = mole / mass of water in Kg

Molality of NaBr = 0.142 / 0.415

Molality of NaBr = 0.342 m

Therefore, the molality of NaBr solution is 0.342 m.

5 0
3 years ago
Although the Statue of Liberty is made of copper (originally an orange-brown color), it is green because the copper has interact
kakasveta [241]
<span>Although the Statue of Liberty is made of copper (originally an orange-brown color), it is green because the copper has interacted with substances in the air to form new substances with different properties. This is an example of a B. chemical change.
That is because chemical change occurs when certain substances change their properties when they interact with other substances. This is why the color of copper changed, while its physical properties stayed the same.
</span>
8 0
3 years ago
For many purposes we can treat ammonia (NH) as an ideal gas at temperatures above its boiling point of -33.C. Suppose the temper
levacccp [35]

Answer:

In homeothermic (“warm-blooded”) animals, body temperature is carefully  

regulated. The hypothalamus, located in the brain, acts as the master ther-

mostat to keep body temperature constant to within a fraction of a degree  

Celsius in a healthy animal. If the body temperature starts to deviate much  

from the desired constant level, the hypothalamus causes changes in blood  

flow and initiates other processes, such as shivering or perspiration, to bring  

the temperature back to normal. What evolutionary advantage does a con-

stant body temperature give the homeotherms (e.g., birds and mammals)  

over the poikilotherms (e.g., reptiles and insects), whose body temperatures  

are not kept constant? What are the disadvantages?

Explanation: Basic chemical understanding as revealed upwards  

6 0
3 years ago
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