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3 years ago

The combining of atoms is known as nuclear fusion. true false

1 answer:

7 0

True, nuclear fusion is a reaction in which multiple atoms come in contact to form new atom and subatomic particles. in a nuclear fusion, some of the mass is lost which defies the law of conservation of mass, but according to scientist the lost in mass is manifested in the production of huge amount of energy,

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24g of methane were burned in an excess of air. What mass of water would be produced in the reaction assuming complete combustio

expeople1 [14]

Answer:

54g of water

Explanation:

Based on the reaction, 1 mole of methane produce 2 moles of water.

To solve this question we must find the molar mass of methane in order to find the moles of methane added. With the moles of methane and the chemical equation we can find the moles of water produced and its mass:

Molar mass CH₄:

1C = 12g/mol*1

4H = 1g/mol*4

12g/mol + 4g/mol = 16g/mol

Moles methane:

24g CH₄ * (1mol / 16g) = 1.5 moles methane

Moles water:

1.5moles CH₄ * (2mol H₂O / 1mol CH₄) = 3.0moles H₂O

Molar mass water:

2H = 1g/mol*2

1O = 16g/mol*1

2g/mol + 16g/mol = 18g/mol

Mass water:

3.0moles H₂O * (18g / mol) =

<h3>54g of water</h3>

8 0

3 years ago

A 10 gram iron nail absorbed 125J of heat. What was the final temperature of the nail if the original temperature was 25°C?

valentina_108 [34]

Answer:

52.1 degrees C

Explanation:

We need to use the equation: q = mCΔT, where m is the mass in grams, C is the specific heat capacity, and ΔT is the change in temperature.

Here, m = 10 g and q = 125 J. The heat capacity of iron is about 0.461 J/(g * C). And, our initial temperature is 25. So:

125 J = (10 g) * (0.461 J/(g * C)) * (T_f - 25)

Solving for T_f (final temp), we get: 52.1 degrees C

Hope this helps!

7 0

3 years ago

Which of the following series of scientific steps is most likely in the correct order?

Leni [432]

Observation, hypothesis, experiment is the correct answer

4 0

3 years ago

Read 2 more answers

Question 1 (3 points)

Diano4ka-milaya [45]

4) decreases, decrease

Explanation:

If the weight of an object decreases the mass of the object decreases. Weight is a form of force that acts under the acceleration due to gravity.

Weight = mass x acceleration due to gravity

Acceleration due to gravity on earth is a constant value of 9.8m/s²

from the problem, we see that mass is directly proportional to the weight of an object.

If the weight increases, the mass increases. If the weight increases then mass will increase.

Learn more:

Acceleration brainly.com/question/3820012

#learnwithBrainly

7 0

3 years ago

What is the specific name of the covalent compound consisting of nine carbon atoms and 20 hydrogen atoms?

givi [52]

The compund C9H20 is chemically named Nonane.

8 0

3 years ago