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zloy xaker [14]
3 years ago
5

Plzz!!! I need help now this is science

Chemistry
1 answer:
Neko [114]3 years ago
5 0
1)300-100=200N
2)300+100=400N
3)200+100-300=300-300=0N
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One mole of carbon (12.0 g) in the form of crystalline graphite is burned at 25◦C and 1.000 atm pressure to form CO2(g). All of
iogann1982 [59]

Answer:

T₂ = 43.46 °C  

Explanation:

Given that:

The heat of the formation of carbon dioxide = - 393.5 kJ/mol (Negative sign suggests heat loss)

It means that energy released when 1 mole of carbon undergoes combustion = 393.5 kJ = 393500 J

Heat gain by water = Heat lost by the reaction

Thus,    

m_{water}\times C_{water}\times \Delta T=Q

For water:  

Mass of water  = 5100 g

Specific heat of water = 4.18 J/g°C  

T₁ = 25 °C  

T₂ = ?

Q = 393500 J

So,

5100\times 4.18\times (T_2-25)=393500  

T₂ = 43.46 °C  

6 0
3 years ago
Why do you think the transition metals are 10 columns wide?
Tasya [4]
The transition metals are 10 columns wide because they can hold no more than 10 electrons. This is why their width correlates with the number of electrons that are included in these metals. Transition metals include most commonly used metals, such as iron, copper, silver, and gold.
4 0
3 years ago
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When the law of conservation of energy is applied to heat, it is known as the _____ law of thermodynamics. a) zeroth b) first c)
Alex_Xolod [135]

Answer:

b     first

Explanation:

first law of thermodynamics: energy can neither be created or destroyed; however, when heat is added to a system, energy can be changed from one form to another.

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3 years ago
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Question 22 3 p Use Bowen's Reaction Series to describe how different igneous rocks form from a single body of magma. Which spec
Leokris [45]

Answer:

The Bowen's reaction series describes how minerals form in sequential order, forming at higher temperature to a lower temperature. There are two branches of crystallization, one is the continuous branch that is on the right and the other is the discontinuous branch that is on the left.

The minerals that are at the top of the Bowen's reaction series forms at a higher temperature.  

In the discontinuous branch, the first mineral to crystallize from the melt is Olivine that forms at a higher temperature of about 1400°C. After crystallization, some melt remains and undergoes fractional crystallization leading to the formation of Pyroxene. Again, with the remaining melt, it reacts and forms Amphibole, followed by Biotite (mica).

In the continuous branch, the first minerals to form are the calcium-rich minerals and successively forms sodium-rich minerals. These minerals that form at a higher temperature are basic in nature and gradually change into acidic minerals.

From both the branches, it commonly forms the mineral Potassium feldspar. After this, the remaining melt combines with the magma and forms Muscovite (Mica), and at a temperature of about 650°C, it forms a more resistant and stable mineral known as the Quartz.

4 0
3 years ago
How many grams of salt are in 5 l of a solution with a concentration of 3 g/L
inn [45]

Answer: 15 grams of salt are there in 5 L of solution.

Explanation:

Concentration of a solution is defined as the number of grams of solute dissolved per liter of the solution.

Given : Concentration of solution : 3 g/L

1 Liter of solution contains = 3 gram of salt

Thus 5 L of solution contains = \frac{3g}{1L}\times 5L=15g

Thus 15 grams of salt are there in 5 L of solution.

8 0
3 years ago
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